NEWSLETTER 02/2021 08.02.2021

Please acknowledge use of the database www.shark-references.com in your publications, and cite: 

Pollerspöck, J. & Straube, N. 2021, Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali), www.shark-references.com, World Wide Web electronic publication, Version 2021

new papers from team shark-references:

New research about teeth and rostral denticles of extant and extinct sawsharks, co-authord by JP from team shark-references ????
more information and ordering: http://www.palaeontos.be/33/det33.html
REINECKE T., POLLERSPÖCK J., MOTOMURA H., BRACHER H., DUFRAING L., GÜTHNER T. & VON DER HOCHT F., 2020. Sawsharks (Pristiophoriformes, Pristiophoridae) in the Oligocene and Neogene of Europe and their relationships with extant species based on teeth and rostral denticles. ISSN: 1377-4654
107 textpages, 44 textfigures, 5 tables.
Abstract: In the fossil record, sawsharks (family Pristiophoridae BLEEKER, 1859) include the genera Pristiophorus MÜLLER & HENLE, 1837, Pliotrema REGAN, 1906 and Ikamauius KEYES, 1979, which are mainly or exclusively represented by isolated lateral denticles of their saw-like rostra or less commonly (Pristiophorus) also by tiny oral teeth. We studied a large collection of fossil pristiophorid rostral denticles and oral teeth obtained from numerous localities exposing marine deposits of Rupelian to Tortonian age (Lower Oligocene to Upper Miocene) in the North Alpine Foreland Basin, North Sea Basin, Northeastern Atlantic and Central/northern Mediterranean Sea. In order to interprete the perceptible differences in tooth and denticle morphology of the fossil material, we conducted a parallel study on oral dentitions and rostral denticles in extant taxa of the Pristiophoridae. Representative samples of upper/lower oral teeth and of lateral/ventral rostral denticles are illustrated to document the heterodonty of teeth and characteristic features of denticles. In all species a gradient monognathic heterodonty is conspicuous. A dignathic heterodonty, typical of Pristiophorus spp., is mainly constituted by teeth in anteriormost files of the lower jaw that are larger and more strongly cambered labially than corresponding teeth in the upper dentition. Four new species are described: Pristiophorus borealis sp nov. from the Sülstorf Formation, early to middle Chattian, Mecklenburg, northeastern Germany; Pristiophorus austriacus sp nov. from the Ebelsberg Formation, Upper Egerian regional stage (Aquitanian), Upper Austria; Pristiophorus ungeri sp nov. from the Neuhofen Formation, lower Ottnangian regional stage (middle Burdigalian), Lower Bavaria, southern Germany and Pristiophorus tortonicus sp nov. from the Upper Mica Clay, early Tortonian, Schleswig-Holstein, northern Germany. For Pristiophorus suevicus JAEKEL, 1890, previously based on a lateral rostral denticle from the conglomeratic Baltringen Horizon, Baltringen Formation (middle Ottnangian, Burdigalian of southwestern Germany), we present a detailed description of oral teeth recovered from lower Ottnangian deposits of the North Alpine Foreland Basin. Palaeoenvironmental data of Paleogene and Neogene lithostratigraphic units (in a European geographical context) that commonly yield pristiophorid teeth/denticles suggest a preference of extinct sawsharks for middle to outer neritic and upper bathyal settings with soft (clayey, silty) bottoms, in agreement with the large depth range of most extant species on the middle to deep shelf and upper slope and the existence of a clear deep-water species (Pristiophorus schroederi) in the family.

Another paper co-authord by JP from team shark-referenes!
For more information and ordering please visit http://www.palaeontos.be/33/det33.html
HÖLTKE O., UNGER E., POLLERSPÖCK J. & RASSER M.W., 2020. The elasmobranch fauna from the Upper Marine Molasse (Lower Miocene, Burdigalian) of Ursendorf (SW-Germany). 53 textpages, 7 textfigures, 2 tables, 9 plates. ISSN: 1377-4654
85 textpages, 8 textfigures, 61 tables
Abstract:The Early Ottnangian (Early Miocene, Burdigalian) marine deposit of Ursendorf (Baden-Württemberg, South Germany) belongs to the Upper Marine Molasse (UMM) unit in the Northern Alpine Foreland Basin. The outcropping sediments mainly consist of coarse-grained, poorly sorted sands, partly showing large-scale cross-bedding. In these sediments, 24 genera of sharks and rays could be identified (Aetobatus, Araloselachus, Carcharias, Carcharhinus, Carcharodon, Carcharoides, Centrophorus, Dasyatis, Echinorhinus, Galeocerdo, Hemipristis, Isurus, Otodus (Megaselachus), Mitsukurina, Myliobatis, Notorynchus, Odontaspis, Pachyscyllium, Physogaleus, Pseudocarcharias, Raja, Rhinoptera, Squatina, Taeniurops), five of which are extinct (Araloselachus, Carcharoides, Otodus (Megaselachus), Pachyscyllium, Physogaleus). Nearly all the taxa fed on invertebrates (squid, shrimps, etc.) and/or bony fishes. One taxon (Galeocerdo) is a more ‘generalistic’ feeder on invertebrates and fishes as well as on seabirds, snakes, turtles and marine mammals. Otodus (Megaselachus) and possibly also Carcharodon mainly preyed on marine mammals as well as bony fishes. The invertebrate remnants found in the same sediments (Mollusca, Bryozoa, etc.) as well as the bony fish teeth (Sparidae) indicate a typical soft-bottom community in temperate shallow water below the storm wave base. The rich invertebrate fauna and the bony fishes were a rich food supply for the sharks and rays. In order to compare Ursendorf with 16 other UMM localities in South Germany and Switzerland, a cluster analysis was conducted. In all of the three calculated indices, the Ursendorf shark fauna is most similar to that of Ballendorf, Baltringen, Ulm-Ermingen and Walbertsweiler (all in Baden-Württemberg), Benken (Switzerland) and Neuburg am Inn-Höch (Bavaria). This similarity can be explained by palaeogeographic and palaeoenvironmental features.


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New Images

Many thanks to the following people for providing images:

Frederik Mollen (Elasmobranch Research Belgium) for the images of Squatina squatina (LINNAEUS, 1758)

Marta D. Palacios, Mexico for images of Mobula munkiana NOTARBARTOLO DI SCIARA, 1987

Вячеслав Смелков for some images of Archaeolamna kopingensis (DAVIS, 1890) and Cretolamna appendiculata (AGASSIZ, 1843)

Dr. Simon Weigmann, Elasmobranch Research Laboratory, Hamburg, Germany for a image of 
Bathyraja arctowskii (DOLLO, 1904)

Otto Bismarck Fazzano Gadig, Laboratório de Pesquisa de Elasmobrânquios, UNESP, Brazil for a image of Mitsukurina owstoni JORDAN, 1898 and Mustelus norrisi SPRINGER, 1939

Missing papers:

Many thanks to all friends of shark-references, who sent us some missing papers last month!

Shark-References would kindly like to ask you for your contribution to this project.

At the moment we are looking for some of the following papers:

Extinct Chondrichthyes:

MATSUMOTO, H. (1936) Upper Miocene vertebrates from Kumanodô, Natori district, province of Rikuzen. Dobutsugaku Zasshi, 48: 475–480, 5 fig.

ALVINERIE, J. & ANDREIEFF, P. & ANGLADA, R. & AUBERT, J. & CAPPETTA, H. & CARALP, M. & CARATINI, C. & CARBONNEL, G. & CATZIGRAS, F. & COURME-RAULT, M.-D. & CHATEAUNEUF, J.-J. & DEMARCQ, G. & DUCASSE, O. & FATTON, E. & GLAÇON, G. & LABRACHERIE, M. & LAURIAT, A. & LE CALVEZ, Y. & LORENZ, C. & MAGNE, J. & MARGEREL, J.-P. & POIGNANT, A. & PUJOL, C. & ROGER, J. & ROMAN, J. & BLONDEAU, A. & MULLER, C. (1973) A propos de la limite oligo-miocène: résultats préliminaires d'une recherche collective sur les gisements d'Escornébéou (Saint-Géours-de-Maremne, Landes, Aquitaine méridionale). Présence de Globigerinoides dans les faunes de l'Oligocène supérieur. Comptes rendus sommaires des séances de la Société géologique de France: 75–76

BOYD, B.M. (2016) Fossil sharks and rays of Gainesville creeks; Alachua County, Florida: Hogtown group; (middle Miocene to lower Pliocene). Florida Paleontological Society, Special Publication

Extant Chondrichthyes:

KAMOHARA, T. (1943) Some unrecorded and two new fishes from Prov. Tosa, Japan. Bulletin of the Biogeographical Society of Japan, 13 (17): 125–137

DE BUEN, F. (1950) Contribuciones a la Ictiología. II. El tiburón vitamínico de la costa uruguaya Galeorhinus vitaminicus nov. sp., y algunas consideraciones generales sobre su biología. Publicaciones Cientificas, Servicio Oceanografico y de Pesca, Ministerio de Industrias y Trabajo, Montevideo No. 4: 153–162.

CADENAT, J. (1951) Initiations Africaines. III. Poissons de Mer du Sénégal. Institute Francais d'Afrique Noire. Initiations Africaines. III. Poissons de Mer du Sénégal.: 1–345

WEIBEZAHN, F.H. (1953) Una nueva especie de Scyliorhinus de Venezuela (Chondrichthyes - Elasmobranchii). Novedades cientificas. Serie zoológica. Museo de Historia Natural La Salle, 9: 1–7.

SMITH, J.L.B. (1958) The mystery killer, the new shark Carcharhinus vanrooyeni. Veld & Vlei, 3 (9): 12–14, 28.

SICCARDI, E. (1961) Cetorhinus en el Atlantico sur (Elasmobranchii: Cetorhinidae). Actas y trabajos del Primer Congreso Sudamericano de Zoologia, 4 (5): 251–263

GUBANOV, E.P. & SCHLEIB, N.A. (1980) Sharks of the Arabian Gulf. Kuwait Ministry of Public Works, Agracultural Department, Fisheries Division. Sharks of the Arabian Gulf.: 1–69

DOLGANOV, V.N. (1983) Rukovodstvo po opredeleniyu khryashchevykh ryb dal'nevostochnykh morei SSSR i sopredel'nykh vod. [Manual for identification of cartilaginous fishes of Far East seas of USSR and adjacent waters.] TINRO, Vladivostok. Rukovodstvo po opredeleniyu khryashchevykh ryb dal'nevostochnykh morei SSSR i sopredel'nykh vod.: 92 pp.

ROBERTS, T.R. (2020) The first two species of South American freshwater stingrays of the genus Potamotrygon, reported from the Orinoco Basin of Colombia by François Roulin in 1829. Aqua, International Journal of Ichthyology, 26 (3-4): 92-112

Please support www.shark-references.com and send missing papers (not listed papers or papers without the info-symbol) to juergen.pollerspoeck@shark-references.com or nicolas.straube@shark-references.com



Upcoming Meetings:

NEW information!
After discussions with the EEA Board, we have decided to postpone this year’s European Elasmobranch Association Annual Meeting entirely until 2021. The good news is that it will be at the same venue, around the same time, just one year on! We hope to see you all there.

The 24th Annual Scientific Meeting of the European Elasmobranch Association will be held by the Dutch member group Nederlandse Elasmobranchen Vereniging (NEV) in Leiden, the Netherlands between 28th and 30th October, 2020. The venue is the fascinating Naturalis Biodiversity Center.

Looking forward to seeing you in Leiden!


Puebla, México, 19 - 23/04/2021

The Sociedad Mexicana de Peces Cartilaginosos, A. C. (SOMEPEC), is a non-profit organization that organizes the IX National Symposium of Sharks and Rays, and II Latin American Congress Sharks, Rays and Chimeras.

La Sociedad Mexicana de Peces Cartilaginosos, A. C. (SOMEPEC), es una organización sin fines de lucro, que busca promover el estudio científico de los tiburones y rayas, así como uso racional. Fiel a su objetivo de crear espacios para el intercambio de experiencias y avances de las diferentes líneas de investigación sobre tiburones y rayas, que se desarrollan en México y el resto del mundo, organiza el IX Simposium Nacional de Tiburones y Rayas, y II Congreso Latinoamericano de Tiburones, Rayas y Quimeras.



Extant Chondrichthyes:

ROBERTS, T.R. (2020): The first two species of South American freshwater stingrays of the genus Potamotrygon, reported from the Orinoco Basin of Colombia by François Roulin in 1829. Aqua, International Journal of Ichthyology, 26 (3-4): 92-112
New species: Potamotrygon roulini
Abstract: French naturalist and explorer François Désiré Roulin (1796-1874) reported the first two known species of the freshwater potamotrygonid stingray genus Potamotrygon from the Orinoco basin, Upper Rio Meta in the Province of San Martin near Bogota, Colombia (Roulin 1829a,b). These were known to the local Indians as Pastenague or Raya tachetée, and Raya cascabel or Pastenague noire. They regarded the former as toxic and inedible, the latter as non-toxic and edible. The Pastenague noire was described and named Pastenagus humboldtii Roulin, 1829b), based on a specimen 424 mm disc width that was not kept. Roulin did not obtain any material of the Pastenague tachetée. In 1877 Garman named the genus Potamotrygon, selecting Potamotrygon humboldtii (Roulin 1829), earliest named species in the genus as its type species. At the same time he indicated Potamotrygon histrix (Müller and Henle in Valenciennes 1839, type locality Buenos Aires, Argentina) as identical with P. humboldtii. No additional specimens of P. humboldtii have been reported. Jordan selected Trygon hystrix Müller & Henle 1841 [=Trygon hystrix Müller & Henle 1839] as type species of Potamotrygon (Jordan, 1919: 389). This type species designation has been accepted by subsequent authors including Séret & McEachran, 1987: 6. At the request of the author, Heiko Bleher visited Roulin’s Orinocan collecting locality in 2015 in order to collect his two supposed species of Potamotrygon. Unfortunately, the region has now been completely destroyed by deforestation, palm oil plantations and oil drilling and Bleher was able to succeed only in obtaining a single specimen of the undescribed Pastinague tachetée. This specimen is described here as Potamotrygon roulini new species.

STEHMANN, M.F.W. & WEIGMANN, S. & NAYLOR, G.J.P. (2021): First complete description of the dark-mouth skate Raja arctowskii Dollo, 1904 from Antarctic waters, assigned to the genus Bathyraja (Elasmobranchii, Rajiformes, Arhynchobatidae) Marine Biodiversity, 51: 18
Species (first complete description): Raja arctowskii
Abstract: The dark-mouth skate, Raja arctowskii Dollo, 1904 from Antarctic waters is an extraordinary case in skate taxonomy. For more than 100 years, this species has been known only from three empty egg capsules and the species as such has remained undescribed due to the lack of specimens that could be assigned to Dollo’s small capsules. Since trawled egg capsules and an egg capsule containing a near-term embryo became available, it finally was possible to connect specimens with the empty egg capsules and completely describe Dollo’s R. arctowskii with detailed external morphology, skeletal features, clasper morphology, and clasper skeleton and assign it to the genus Bathyraja Ishiyama, 1958aBathyraja arctowskii is one of the smallest known species of Bathyraja, attaining only a 61 cm total length (TL). It is characterized by an at least partly, usually completely medium to dark grayish pigmented mouth cavity, as well as the often dark underside of the nasal curtain from very small juvenile stages onwards. It further differs from most congeners in Antarctic and Subantarctic waters in the absence of thorns on the dorsal disc. It appears to be a wide-ranging, circumantarctic species found in the Atlantic, Pacific, and Indian Ocean sectors of the Southern Ocean. The species seems to be locally common at least in the Atlantic sector, with up to 94 juvenile to subadult specimens caught in one single haul.

Extinct Chondrichthyes:

no news this month :-)

VAN DER SPUY, L. & SMIT, N.J. & SCHAEFFNER, B.C. (2020): Four new species of Acanthobothrium van Beneden, 1849 (Cestoda: Onchoproteocephalidea) from the spotted skate, Raja straeleni Poll, off the Western Cape, South Africa. Folia Parasitologica, 67: 2020.036
New species: Acanthobothrium microhabentes, Acanthobothrium microtenuis, Acanthobothrium crassus, Acanthobothrium dolichocollum
Abstract: The examination of eight spotted skates, Raja straeleni Poll, resulted in the discovery of four new species of Acanthobothrium van Beneden, 1849, namely A. microhabentes sp. n., A. microtenuis sp. n., A. crassus sp. n., and A. dolichocollum sp. n., located off the Western Cape of South Africa. With a total of over 200 valid species of Acanthobothrium recognised worldwide, the use of an integrative approach becomes imperative in the interest of simplifying interspecific comparisons between congeners. In accordance with this, the four new species were incorporated into the category classification system established by Ghoshroy and Caira in 2001, where they were identified as category 2 species, which, at present, includes 47 recognised species of Acanthobothrium. Nevertheless, each of the four new species exhibits postovarian testes, a most intriguing and highly unusual feature among Acanthobothrium, instantly differentiating them from most congeners. This feature has been reported in 12 congeners, which have previously been considered to be restricted to waters of the Indo-Pacific Ocean. Not only do the four new congeners represent the first species of Acanthobothrium reported from southern Africa, but they also represent the first reported species with postovarian testes from the southern Atlantic Ocean. Regarding the legitimacy of the four new species, only two other category 2 species are reported to exhibit this feature, namely A. popi Fyler, Caira et Jensen, 2009, and A. bobconniorum Fyler et Caira, 2010, to which the four congeners were compared to. Acanthobothrium microhabentes sp. n. is the smallest of the congeners and differs from A. popi and A. bobconniorum by having fewer testes and postovarian testes, a shorter body, fewer proglottids, a shorter scolex, and longer cephalic peduncle. Acanthobothrium microtenuis sp. n. differs from A. popi and A. bobconniorum by having fewer testes and postovarian testes, a shorter scolex, longer cephalic peduncle, and the possession of columnar spinitriches on the anterior region of the terminal proglottid. Acanthobothrium crassus sp.n. differs from A. popi and A. bobconniorum by having fewer postovarian testes, a narrower cirrus-sac, larger vitelline follicles, and a longer cephalic peduncle. Acanthobothrium dolichocollum sp. n. is the longest of the four new species and differs from A. popi and A. bobconniorum by having fewer postovarian testes, more postporal testes, a larger body, more proglottids, larger testes and vitelline follicles, and an exceptionally long cephalic peduncle. Apart from differences in overall size, the four new species differ in a combination of measurements for the scolex, vitelline follicles, muscular pad and cephalic peduncle, and the number of proglottids and testes. The four species were recovered from a previously unexplored host and locality, expanding the host associations and geographical distribution of the genus.
GALLAGHER, K.A. & CAIRA, J.N. (2020): A New Species of Acanthobothrium (Cestoda: Onchoproteocephalidea) from the Smalleye Pygmy Shark, Squaliolus aliae (Chondrichthyes: Squaliformes: Dalatiidae), from Taiwan. Journal of Parasitology, 106 (6): 818-827
New species: Acanthobothrium katherineae
Abstract: The cestode fauna of Squaliolus aliae was examined for the first time following the collection of elasmobranch specimens from Taiwan in 2005, 2013, and 2017. This small shark was found to host 2 tapeworm species. These consist of Acanthobothrium katherineae n. sp., which is new to science and is described herein, and a second species, in the genus Scyphophyllidium, which also appears to be new, but which is represented by insufficient material for formal description. Acanthobothrium katherineae is a category 5 species. It can be distinguished from 5 of the 19 other category 5 species in that it is apolytic, retaining proglottids on its strobila until they are gravid. This new species differs from the remaining 14 category 5 species in its combination of the following features: It is a smaller worm, has fewer than 100 proglottids, has a relatively short cephalic peduncle, and differs in bothridial size and loculus ratio. Sequence data for the D1–D3 region of the 28S rDNA gene were generated for one specimen of A. katherineae. This sequence, along with comparable sequence data for adults of 14 described and 2 undescribed species as well as specimens of 6 undescribed larval members of the genus, was included in a maximum likelihood phylogenetic analysis. The resulting tree places the shark-hosted A. katherineae within a clade of stingray-hosted species, with Acanthobothrium romanowi as its sister taxon. Acanthobothrium katherineae is 1 of only 19 Acanthobothrium species known to parasitize sharks. The tree resulting from this study, which is preliminary given the relatively poor taxon sampling of the diversity in the genus, included 3 of the shark-parasitizing Acanthobothrium species and suggests that all 3 represent host-switching events. This is the first report of an Acanthobothrium species from the family Dalatiidae and the first report of a Scyphophyllidium species from the order Squaliformes. These findings suggest that other members of the Squaliformes, many of which have not previously been examined for parasites, may host additional novel cestode taxa.
TREVISAN, B. & CAIRA, J.N. (2020): Three New Species of Rhinebothrium (Cestoda: Rhinebothriidea) from the Leopard Whipray, Himantura leoparda, in Australia. Journal of Parasitology, 106 (6): 789-801
New species: Rhinebothrium leopardensis, Rhinebothrium nandoi, Rhinebothrium ruhnkei
Abstract: xamination of 4 specimens of the leopard whipray Himantura leoparda, a dasyatid stingray from northern Australia, led to the discovery of 3 new species of Rhinebothrium. Rhinebothrium leopardensis n. sp., Rhinebothrium nandoi n. sp., and Rhinebothrium ruhnkei n. sp. are described, increasing the diversity of the genus to 51 species globally. All 3 new species differ from their congeners in terms of testis number, proglottid number, loculus number, and size. With respect to one another, R. leopardensis n. sp. has bothridia that are weakly constricted at their centers and has a greater number of proglottids than the other 2 species (93–108 vs. 11–15, and 48–78, respectively). Rhinebothrium nandoi n. sp. is the smallest of the 3 species found in H. leoparda (3.6–5 vs. 10–15 mm and 10.1–15.8 mm in total length [TL], respectively) and bears bothridia that are constricted at their centers. Rhinebothrium ruhnkei n. sp. bears bothridia that are conspicuously constricted at their centers and has more testes than R. leopardensis and fewer than R. nandoi (7–10 vs. fewer than 7 and 21–33, respectively). Before this study, 56% (27 of 48) of Rhinebothrium species had been described from the freshwater river systems of South America and the marine waters surrounding South and North America. In contrast, despite the remarkably diverse nature of its batoid fauna, only 19 species were known from the Indo-Pacific region. Our work increases this number to 22, emphasizing the highly underestimated nature of Rhinebothrium diversity in this region of the globe. The discovery of these 3 new species was not unexpected, given the relatively poor status of our current knowledge of the cestode faunas of dasyatid stingrays in the Indo-Pacific region, and given the fact that it is common for a single batoid species to host 2 or more species of Rhinebothrium. Our results suggest that additional work on the cestode faunas of the batoids, especially dasyatids, from the Indo-Pacific region is likely to be highly productive in terms of contributing to the knowledge of Rhinebothrium diversity.
SANTOS, J.V. & MARQUES, F.P.L. & TREVISAN, B. (2020): The First Report and Description of a New Species of Rhinebothrium from a Dasyatid Stingray from the Brazilian Northeastern Coast with a Review of the Distribution of the Genus Throughout Endemic Marine Ecoregions. Journal of Parasitology, 106 (6): 809-817
New species: Rhinebothrium ramosi
Abstract: Here we describe a new species of RhinebothriumLinton, 1890, from Hypanus guttatus (Bloch and Schneider). Rhinebothrium ramosi n. sp. can be differentiated from all 51 valid species of the genus by having 4–5 testes and uterus that extends throughout the entire length of the proglottid. Only 8 of the above species closely resemble R. ramosi in total length (Rhinebothrium bunburyenseRhinebothrium chollaenseRhinebothrium corbataiRhinebothrium dasyatidisRhinebothrium kruppiRhinebothrium lintoniRhinebothrium margaritense, and Rhinebothrium reydai). Despite the resemblance, R. bunburyenseR. corbataiR. dasyatidisR. lintoni, and R. margaritense can be distinguished from the new species by possessing a larger number of proglottids. The remaining 3 species (R. chollaenseR. kruppi, and R. reydai) overlap in total length and number of proglottids with R. ramosi. However, they can be distinguished from the new species by possessing a single posterior-most bothridial loculus instead of arranged as a pair, as found in the new species. This is the first report of the genus from the coastal waters of Brazil and brings to 52 the number of valid species for this genus. Additionally, we use the patterns of infection and distribution for species of Rhinebothrium to make predictions of expected diversity within the genus, especially for unsurveyed hosts in endemic marine ecoregions of the world.
GOLZARIANPOUR, K. & MALEK, M. & GOLESTANINASAB, M. & SARAFRAZI, A. & KOCHMANN, J. (2021): Two new enigmatic species of Rhinebothrium (Cestoda: Rhinebothriidae) from the Persian Gulf: notes on generic traits and host specificity. Systematics and Biodiversity, in press
New species: Rhinebothrium klimpeli, Rhinebothrium atabaki
Abstract: In the course of a three-year study conducted from January 2017 till November 2019, a total of 279 individuals belonging to 11 batoid species off northern coasts of the Persian Gulf and the Gulf of Oman were examined for the genus Rhinebothrium Linton, 1890 (Rhinebothriidea: Rhinebothriidae). Infection of Maculabatis randalli (Last, Manjaji-Matsumoto & Moore, 2012), M. arabica Manjaji-Matsumoto & Last et al., 2016, and Pateobatis fai (Jordan & Seale, 1906) with rhinebothriid cestodes is reported for the first time. In total, seven rhinebothriid species were recognized. Rhinebothrium klimpeli sp. nov. from Pateobatis fai and Rhi. atabaki sp. nov. from Maculabatis randalli are described herein. Both species differ from one another and their congeners on the basis of various characteristics of the scolex and proglottids. In order to create a DNA Barcoding library for local species and perform a phylogenetic analysis, different marker genes for seven species of Rhinebothrium were partially sequenced here for the first time; nuclear small subunit rDNA (SSU) and large subunit rDNA (LSU), and the Cytochrome c oxidase subunit I (COI) gene. Both Bayesian inference and maximum likelihood phylogenetic analyses using nuclear markers confirmed species boundaries recognized by morphological characteristics. Furthermore, both new species are classified into the genus Rhinebothrium based on molecular data. The description of Rhi. klimpeli sp. nov. leads us to modify the diagnosis of the genus Rhinebothrium in introducing the character 'bearing pre- and postvaginal testes' and 'lacking postovarian testes'. Rhinebothrium verticillatum (Subhapradha, 1955) is redescribed herein with designation of the neotype identified from the type host Rhynchobatus laevis (Bloch & Schneider, 1801) deposited at the Collection of the Zoological Museum, University of Tehran (ZUTC). All parasite species except Rhi. verticillatum were found in more than one host species from different families. Among them, Rhi. atabaki sp. nov. infects seven of 11 host species and seems to have the lowest host specificity. Furthermore, some implications for host specificity of rhinebothriid species are discussed.


PLEASE send your new papers to
juergen.pollerspoeck@shark-references.com or 

Latest Research Articles

Extant Chondrichthyes:

AJEMIAN, M.J. & LAMBOY, C. & IBRAHIM, A. & DEGROOT, B.C. & BASSOS-HULL, K. & MANN, D.A. & CHERUBIN, L. (2021) Capturing shell-crushing by large mobile predators using passive acoustics technology. Journal of Experimental Marine Biology and Ecology, 535: 151497 https://dx.doi.org/10.1016/j.jembe.2020.151497
ÁLVARO-BERLANGA, S. & CALATAYUD-PAVÍA, C.E. & CRUZ-RAMÍREZ, A. & SOTO-JIMÉNEZ, M.F. & LIÑÁN-CABELLO, M.A. (2021) Trace elements in muscle tissue of three commercial shark species: Prionace glauca, Carcharhinus falciformis, and Alopias pelagicus off the Manzanillo, Colima coast, Mexico. Environmental Science and Pollution Research, in press https://dx.doi.org/10.1007/s11356-020-12234-5
AMINI, S. & RAZI, H. & SEIDEL, R. & WERNER, D. & WHITE, W.T. & WEAVER, J.C. & DEAN, M.N. & FRATZL, P. (2020) Shape-preserving erosion controlled by the graded microarchitecture of shark tooth enameloid. Nature Communications, 11 (1): 5971 https://dx.doi.org/10.1038/s41467-020-19739-0
ANNA, Z. & HINDAYANI, P. & SURYANA, A.A.H. & IHSAN, Y.N. & SALSABILA, A. (2020) Sustainability Study of Scalloped Hammerhead Shark (Sphyrna lewini) in Indramayu Waters. Sustainability, 12 (24): 10459 https://dx.doi.org/10.3390/su122410459
BASUSTA, N. & BASUSTA, A. & TIRASIN, E.M. & SULIKOWSKI, J.A. (2020) Age and growth of the blackchin guitarfish Glaucostegus cemiculus (Geoffroy Saint-Hilaire, 1817) from Iskenderun Bay (Northeastern Mediterranean). Journal of Applied Ichthyology, 36 (6): 880-887 https://dx.doi.org/10.1111/jai.14144
BENNETT, R.H. & EBERT, D.A. & SITOE, J.J. & FERNANDO, S. & HARRIS, M. & VAN BEUNINGEN, D. & DAVIDS, A. (2021) Range extension of the Critically Endangered shorttail nurse shark Pseudoginglymostoma brevicaudatum (Orectolobiformes: Ginglymostomatidae) to include Mozambique, with implications for management. Marine Biodiversity, 51: 7 https://dx.doi.org/10.1007/s12526-020-01137-w
BEVACQUA, L. & REINERO, F.R. & BECERRIL-GARCÍA, E.E. & ELORRIAGA-VERPLANCKEN, F.R. & JUARISTI-VIDEGARAY, D. & MICARELLI, P. & GALVÁN-MAGAÑA, F. & CURIEL-GODOY, P. & GIGLIO, G. & TRIPEPI, S. & BARCA, D. & SPERONE, E. (2021) Trace elements and isotopes analyses on historical samples of white sharks from the Mediterranean Sea. The European Zoological Journal, 88 (1): 132-141 https://dx.doi.org/10.1080/24750263.2020.1853265
BUTCHER, P.A. & COLEFAX, A.P. & GORKIN, R.A. & KAJIURA, S.M. & LÓPEZ, N.A. & MOURIER, J. & PURCELL, C.R. & SKOMAL, G.B. & TUCKER, J.P. & WALSH, A.J. & WILLIAMSON, J.E. & RAOULT, V. (2021) The Drone Revolution of Shark Science: A Review. Drones, 5: 8 https://dx.doi.org/10.3390/drones5010008
BYRNES, E.E. & DALY, R. & LEOS-BARAJAS, V. & LANGROCK, R. & GLEISS, A.C. (2021) Evaluating the constraints governing activity patterns of a coastal marine top predator. Marine Biology, 168: 11 https://dx.doi.org/10.1007/s00227-020-03803-w
CABALLERO, S. & GALEANO, A.M. & LOZANO, J.D. & VIVES, M. (2020) Description of the microbiota in epidermal mucus and skin of sharks (Ginglymostoma cirratum and Negaprion brevirostris) and one stingray (Hypanus americanus). PeerJ, 8: e10240 https://dx.doi.org/10.7717/peerj.10240 PMCID: PMC7747685
CAPPA, G. & BARCELLA, B. & PETTENAZZA, P. (2020) Extraction procedure of a stingray spine. Journal of Travel Medicine, 27 (6): taaa137 https://dx.doi.org/10.1093/jtm/taaa137
CAPRETZ BATISTA DA SILVA, J.P. & DATOVO, A. (2020) A reappraisal of the pectoral skeleton of lantern sharks (Elasmobranchii: Squaliformes: Etmopteridae). Journal of Morphology, in press https://dx.doi.org/10.1002/jmor.21312
CARBONARA, P. & BELLODI, A. & PALMISANO, M. & MULAS, A. & PORCU, C. & ZUPA, W. & DONNALOIA, M. & CARLUCCI, R. & SION, L. & FOLLESA, M.C. (2020) Growth and Age Validation of the Thornback Ray (Raja clavata Linnaeus, 1758) in the South Adriatic Sea (Central Mediterranean). Frontiers in Marine Science, 7: 586094 https://dx.doi.org/10.3389/fmars.2020.586094
CARRENO, A. & LLORET, J. (2021) The vulnerability of fish and macroinvertebrate species with bioactive potential in a Mediterranean marine protected area. Aquatic Conservation-Marine and Freshwater Ecosystems, in press https://dx.doi.org/10.1002/aqc.3498
CATTANO, C. & TURCO, G. & DI LORENZO, M. & GRISTINA, M. & VISCONTI, G. & MILAZZO, M. (2021) Sandbar shark aggregation in the central Mediterranean Sea and potential effects of tourism. Aquatic Conservation-Marine and Freshwater Ecosystems, in press https://dx.doi.org/10.1002/aqc.3517
CAVE, E.J. & KAJIURA, S.M. (2020) Electrosensory Impairment in the Atlantic Stingray, Hypanus sabinus, After Crude Oil Exposure. Zoology, 143: 125844 https://dx.doi.org/10.1016/j.zool.2020.125844
COLLINS, C. & LETESSIER, T.B. & BRODERICK, A. & WIJESUNDARA, I. & NUNO, A. (2020) Using perceptions to examine human responses to blanket bans: The case of the thresher shark landing-ban in Sri Lanka. Marine Policy, 121: 104198 https://dx.doi.org/10.1016/j.marpol.2020.104198
COUPER, A. & WALTERS, R. (2021) The great white bite: A critique of the Western Australian government's shark hazard mitigation drum line program. Journal of Sociology, in press https://dx.doi.org/10.1177/1440783320964556
CURNICK, D.J. & ANDRZEJACZEK, S. & JACOBY, D.M.P. & COFFEY, D.M. & CARLISLE, A.B. & CHAPPLE, T.K. & FERRETTI, F. & SCHALLERT, R.J. & WHITE, T. & BLOCK, B.A. & KOLDEWEY, H.J. & COLLEN, B. (2020) Behavior and Ecology of Silky Sharks Around the Chagos Archipelago and Evidence of Indian Ocean Wide Movement. Frontiers in Marine Science, 7: 596619  https://dx.doi.org/10.3389/fmars.2020.596619
DALMAU, M.S. & VELANDIA, M.C. & DÍAZ, J.M. & NAVIA, A.F. & MEJÍA-FALLA, P.A. (2020) Presencia de la raya chupare del Pacífico Styracura pacifica en Colombia y ampliación de su distribución geográfica en el Pacífico Oriental Tropical [Occurrence of the Pacific chupare stingray Styracura pacifica in Colombia and extension of its geographical range in the Tropical Eastern Pacific]. Boletín de Investigaciones Marinas y Costeras, 49 (2): 179-184 https://dx.doi.org/10.25268/bimc.invemar.2020.49.2.1028
DE VINCENZI, G. & MICARELLI, P. & VIOLA, S. & BUFFA, G. & SCIACCA, V. & MACCARRONE, V. & CORRIAS, V. & REINERO, F.R. & GIACOMA, C. & FILICIOTTO, F. (2021) Biological Sound vs. Anthropogenic Noise: Assessment of Behavioural Changes in Scyliorhinus canicula Exposed to Boats Noise. Animals 2021, 11 (1): 174 https://dx.doi.org/10.3390/ani11010174
DEARDEN, R.P. & MANSUIT, R. & CUCKOVIC, A. & HERREL, A. & DIDIER, D. & TAFFOREAU, P. & PRADEL, A. (2021) The morphology and evolution of chondrichthyan cranial muscles: A digital dissection of the elephantfish Callorhinchus milii and the catshark Scyliorhinus canicula. Journal of Anatomy, in press https://dx.doi.org/10.1111/joa.13362
DEGROOT, B.C. & BASSOS-HULL, K. WILKINSON, K.A. & LOWERRE-BARBIERI, S. & POULAKIS, G.R. & AJEMIAN, M.J.  (2021) Variable migration patterns of whitespotted eagle rays Aetobatus narinari along Florida’s coastlines. Marine Biology, 168: 18 https://dx.doi.org/10.1007/s00227-021-03821-2
DI BENEDITTO, A.P. & MOREIRA, S.C. & SICILIANO, S. (2021) Endangered whale sharks in southeastern Brazil: Records and management issues. Ocean & Coastal Management, 201: 105491 https://dx.doi.org/10.1016/j.ocecoaman.2020.105491
DOMINGUES, R.R. & MASTROCHIRICO, V.A. & MENDES, N.J. & HASHIMOTO, D.T. & COELHO, R. & DA CRUZ, V.P. & ANTUNES, A. & FORESTI, F. & MENDONCA, F.F. (2020) Comparative eye and liver differentially expressed genes reveal monochromatic vision and cancer resistance in the shortfin mako shark (Isurus oxyrinchus). Genomics, 112 (6): 4817-4826 https://dx.doi.org/10.1016/j.ygeno.2020.08.037
DRYMON, J.M. & SCHWEISS, K.E. & SEUBERT, E.A. & LEHMAN, R.N. & DALY-ENGEL, T.S. & PFLEGER, M. & PHILLIPS, N.M. (2021) Swimming against the flow-Environmental DNA can detect bull sharks (Carcharhinus leucas) across a dynamic deltaic interface. Ecology and Evolution, 11 (1): 22-28 https://dx.doi.org/10.1002/ece3.7101 PMCID: PMC7790648
DULVY, N.K. & YAN, H.F. (2020) Conservation: Goldilocks Nations for Restoring Reef Sharks. Current Biology, 30 (23): R1415-R1418 https://dx.doi.org/10.1016/j.cub.2020.08.060
ELLIS, J.R. & BARKER, J. & PHILLIPS, S.R.M. & MEYERS, E.K.M. & HEUPEL, M. (2021) Angel sharks (Squatinidae): A review of biological knowledge and exploitation. Journal of Fish Biology, in press https://dx.doi.org/10.1111/jfb.14613
EVAGELOPOULOS, A. & BATJAKAS, I.E. & KOUTSOUBAS, D. (2021) Structure and Diversity of the Demersal Fish Assemblages off Psara Island (Central Aegean Sea) Caught by Experimental Bottom Trawling. Thalassas, in press https://dx.doi.org/10.1007/s41208-020-00277-x
FRAZIER, B.S. & BETHEA, D.M. & HUETER, R.E. & MCCANDLESS, C.T. & TYMINSKI, J.P. & DRIGGERS, W.B. (2020) Growth rates of bonnetheads (Sphyrna tiburo) estimated from tag-recapture data. Fishery Bulletin, 118 (4): 329-345 https://dx.doi.org/10.7755/fb.118.4.3
FUJINAMI, Y. & SHIOZAKI, K. & HIRAOKA, Y. & SEMBA, Y. & OHSHIMO, S. & KAI, M. (2021) Seasonal migrations of pregnant blue sharks Prionace glauca in the northwestern Pacific. Marine Ecology Progress Series, 658:163-179 https://dx.doi.org/10.3354/meps13557
GAJIC, A. & ALIC, A. & KAHRIC, A. & BILALOVIC, N. & SUPIC, J. & BESIROVIC, H. (2020) Melanomacrophage centeres and diseases occurring in lesser-spotted catsharks, Scyliorhinus canicula (L.), from the southern Adriatic Sea - importance for monitoring. Acta Adriatica, 61 (2): 175-184  https://dx.doi.org/10.32582/aa.61.2.5
GARZÓNPEÑA, L.V. & BARRERAGARCÍA, A. & DELGADOHUERTAS, A. & POLOSILVA, C. (2021) Isotopic enrichment in Rhizoprionodon porosus (Poey, 1861) and Carcharhinus porosus (Ranzani, 1840) embryos. Journal of Fish Biology, in press  https://dx.doi.org/10.1111/jfb.14651
GIARETA, E.P. & PRADO, A.C. & LEITE, R.D. & PADILHA, E. & DOS SANTOS, I.H. & WOSIAK, C.D.D. & WOSNICK, N. (2021) Fishermen's participation in research and conservation of coastal elasmobranchs. Ocean & Coastal Management, 199: 105421 https://dx.doi.org/10.1016/j.ocecoaman.2020.105421
GLAUS, K.B.J. & APPLEYARD, S.A. & STOCKWELL, B. & BRUNNSCHWEILER, J.M. & SHIVJI, M. & CLUA, E. & MARIE, A.D. & RICO, C. (2020) Insights Into Insular Isolation of the Bull Shark, Carcharhinus leucas (Müller and Henle, 1839), in Fijian Waters. Frontiers in Marine Science, 7: 586015  https://dx.doi.org/10.3389/fmars.2020.586015
GONZÁLEZ-GONZÁLEZ L.V. & CRUZ-ESCALONA, V.H. & EHEMANN, N.R. & DE LA CRUZ-AGÜERO, G. & ABITIA-CÁRDENAS, L.A. & MEJÍA-FALLA, P.A. & NAVIA, A.F. (2020) Riqueza y abundancia relativa de los batoideos de la pesquería artesanal en el archipiélago Espíritu Santo, BCS, México. [Richness and relative abundance of batoids from the artisanal fishery in the Espiritu Santo archipelago, BCS, Mexico] Hidrobiológica, 30 (1): 37-47 https://dx.doi.org/10.24275/uam/izt/dcbs/hidro/2020v30n1/Gonzalez
GRANT, S.M. & MUNDEN, J.G. & HEDGES, K.J. (2020) Effects of monofilament nylon versus braided multifilament nylon gangions on catch rates of Greenland shark (Somniosus microcephalus) in bottom set longlines. PeerJ, 8: e10407 https://dx.doi.org/10.7717/peerj.10407 PMCID: PMC7719291
ISAJLOVIC, I. & DULCIC, J. & PICCINETTI, C. & VRGOC, N. & MANFREDI, C. & DRAGICEVIC, B. (2020) Additional records of Norwegian skate Dipturus nidarosiensis (Storm, 1881) (Pisces: Rajidae) in the Adriatic Sea. Acta Adriatica, 61 (2): 217-222 https://dx.doi.org/10.32582/aa.61.2.11
JAMES, K.C. & NATANSON, L.J. (2021) Positional and ontogenetic variation in vertebral centra morphology in five batoid species. Marine and Freshwater Research, in press https://dx.doi.org/10.1071/mf20183
JU, Y.R. & CHEN, C.F. & CHEN, C.W. & WANG, M.H. & JOUNG, S.J. & YU, C.J. & LIU, K.M. & TSAI, W.P. & VANSON LIU, S.Y. & DONG, C.D. (2021) Profile and consumption risk assessment of trace elements in megamouth sharks (Megachasma pelagios) captured from the Pacific Ocean to the east of Taiwan. Environmental Pollution, 269: 116161 https://dx.doi.org/10.1016/j.envpol.2020.116161
KADAR, J.P. & LADDS, M.A. & DAY, J. & LYALL, B. & BROWN, C. (2020) Assessment of Machine Learning Models to Identify Port Jackson Shark Behaviours Using Tri-Axial Accelerometers. Sensors, 20 (24): E7096 https://dx.doi.org/10.3390/s20247096
KIM, J. & JANG, S.M. & CHOI, E. & JO, E. & LEE, S.J. & KIM, S.H. & CHI, Y.M. & KIM, J.H. & PARK, H. (2021) The complete mitochondrial genome of Eaton's skate, Bathyraja eatonii (Rajiformes, Arhynchobatidae). Mitochondrial DNA Part B-Resources, 6 (1): 91-92 https://dx.doi.org/10.1080/23802359.2020.1847608
KNEEBONE, J. & BOWLBY, H. & MELLO, J.J. & MCCANDLESS, C.T. & NATANSON, L.J. & GERVELIS, B. & SKOMAL, G.B. & KOHLER, N. & BERNAL, D. (2020) Seasonal distribution and habitat use of the common thresher shark (Alopias vulpinus) in the western North Atlantic Ocean inferred from fishery-dependent data. Fishery Bulletin, 118 (4): 399-412 https://dx.doi.org/10.7755/fb.118.4.8
KOMABA, K. & GOTO, H. (2021) A polyaniline/shark skin composite and its conductivity based on polaron hopping. Polymer-Plastics Technology and Materials, in press https://dx.doi.org/10.1080/25740881.2020.1867172
LE CROIZIER, G. & LORRAIN, A. & SONKE, J.E. & HOYOS-PADILLA, E.M. & GALVÁN-MAGAÑA, F. & SANTANA-MORALES, O. & AQUINO-BALEYTÓ, M. & BECERRIL-GARCÍA, E.E. & MUNTANER-LÓPEZ, G. & KETCHUM, J. & BLOCK, B. & CARLISLE, A. & JORGENSEN, SJ. & BESNARD, L. & JUNG, A. & SCHAAL, G. & POINT, D. (2020) The Twilight Zone as a Major Foraging Habitat and Mercury Source for the Great White Shark. Environmental Science & Technology, 54 (24): 15872–15882 https://dx.doi.org/10.1021/acs.est.0c05621
LEAR, K.O. & MORGAN, D.L. & WHITTY, J.M. & BEATTY, S.J. & GLEISS, A.C. (2021) Wet season flood magnitude drives resilience to dry season drought of a euryhaline elasmobranch in a dry-land river. Science of The Total Environment, 750 (1): 142234 https://dx.doi.org/10.1016/j.scitotenv.2020.142234
LEGASPI, C. & MIRANDA, J. & LABAJA, J. & SNOW, S. & PONZO, A. & ARAUJO, G. (2020) In-water observations highlight the effects of provisioning on whale shark behaviour at the world's largest whale shark tourism destination. Royal Society Open Science, 7 (12): 200392 https://dx.doi.org/10.1098/rsos.200392
MARQUEZ-FARIAS, J.F. (2020) Length at maturity of the Pacific angel shark (Squatina californica) in the artisanal elasmobranch fishery in the Gulf of California in Mexico. Fishery Bulletin, 118 (4): 359-364 https://dx.doi.org/10.7755/fb.118.4.5
MARTINEZ-ESCAURIAZA, R. & HERMIDA, M. & VILLASANTE, S. & GOUVEIA, L. & GOUVEIA, N. & PITA, P. (2020) Importance of recreational shore angling in the archipelago of Madeira, Portugal (northeast Atlantic). Scientia Marina, 84 (4): 331-+ https://dx.doi.org/10.3989/scimar.05046.30A
MARTINS, M.F. & COSTA, P.G. & BIANCHINI, A. (2021) Maternal transfer of polycyclic aromatic hydrocarbons in an endangered elasmobranch, the Brazilian guitarfish. Chemosphere, 263: 128275 https://dx.doi.org/10.1016/j.chemosphere.2020.128275
MARTINS, M.F. & COSTA, P.G. & GADIG, O.B.F. & BIANCHINI, A. (2020) Metal contamination in threatened elasmobranchs from an impacted urban coast. Science of The Total Environment, 757: 143803 https://dx.doi.org/10.1016/j.scitotenv.2020.143803
MITCHELL, C.D. & CRISCITIELLO, M.F. (2020) Comparative study of cartilaginous fish divulges insights into the early evolution of primary, secondary and mucosal lymphoid tissue architecture. Fish & Shellfish Immunology, 107: 435-443 https://dx.doi.org/10.1016/j.fsi.2020.11.006
MORALES, N.A. & HEIDEMEYER, M. & BAUER, R. & HERNANDEZ, S. & ACUNA, E. & FRIEDLANDER, A.M. & GAYMER, C.F. (2021) Residential movements of top predators in Chile's most isolated marine protected area: Implications for the conservation of the Galapagos shark, Carcharhinus galapagensis, and the yellowtail amberjack, Seriola lalandi. Aquatic Conservation-Marine and Freshwater Ecosystems, in press https://dx.doi.org/10.1002/aqc.3472
MOREIRA, R.A. & DE CARVALHO, M.R. (2020) Phylogenetic significance of clasper morphology of electric rays (Chondrichthyes: Batoidea: Torpediniformes). Journal of Morphology, in press https://dx.doi.org/10.1002/jmor.21315
MOURA, V.L. & RABELO, J.N. & BEZERRA, M.F. & DA SILVA, G.B. & FARIA, V.V. & REZENDE, C.E. & BASTOS, W.R. & DE LACERDA, L.D. (2020) Ecological and biological factors associated to mercury accumulation in batoids (Chondrichthyes: Batoidea) from northeastern Brazil. Marine Pollution Bulletin, 161: 111761 https://dx.doi.org/10.1016/j.marpolbul.2020.111761
MURGIER, J. & MCLEAN, M. & MAIRE, A. & MOUILLOT, D. & LOISEAU, N. & MUNOZ, F. & VIOLLE, C. & AUBER, A. (2021) Rebound in functional distinctiveness following warming and reduced fishing in the North Sea. Proc Biol Sci., 288 (1942): 20201600 https://dx.doi.org/10.1098/rspb.2020.1600
NIELLA, Y. & RAOULT, V. & GASTON, T. & PEDDEMORS, V.M. & HARCOURT, R. & SMOOTHEY, A.F. (2020) Overcoming multi-year impacts of maternal isotope signatures using multi-tracers and fast turnover tissues in juvenile sharks. Chemosphere, 269: 129393 https://dx.doi.org/10.1016/j.chemosphere.2020.129393
NORRIS, S.B. & REISTAD, N.A. & RUMBOLD, D.G. (2021) Mercury in neonatal and juvenile blacktip sharks (Carcharhinus limbatus). Part II: Effects assessment. Ecotoxicology, in press https://dx.doi.org/10.1007/s10646-020-02325-x
OLEKSYN, S. & TOSETTO, L. & RAOULT, V. & WILLIAMSON, J.E. (2021) Drone-Based Tracking of the Fine-Scale Movement of a Coastal Stingray (Bathytoshia brevicaudata). Remote Sensing, 13 (1): 40 https://dx.doi.org/10.3390/rs13010040
PAHL, K.B. & YURKOWSKI, D.J. & WINTNER, S.P. & CLIFF, G. & DICKEN, M.L. & HUSSEY, N.E. (2020) Determining the appropriate pre-treatment procedures and the utility of liver tissue for bulk stable isotope (δ(13) C and δ(15) N) studies in sharks. Journal of Fish Biology, in press https://dx.doi.org/10.1111/jfb.14635
PALACIOS, M.D. & HOYOS-PADILLA, E.M. & TREJO-RAMÍREZ, A. & CROLL, D.A. & GALVÁN-MAGAÑA, F. & ZILLIACUS, K.M. & O'SULLIVAN, J.B. & KETCHUM, J.T. & GONZÁLEZ-ARMAS, R. (2021) Description of first nursery area for a pygmy devil ray species (Mobula munkiana) in the Gulf of California, Mexico. Scientific Reports, 11 (1): 132 https://dx.doi.org/10.1038/s41598-020-80506-8 PMCID: PMC7794486
PANTOJA-ECHEVARRIA, L.M. & TAMBURIN, E. & MARMOLEJO-RODRIGUEZ, A.J. & GALVAN-MAGANA, F. & ELORRIAGA-VERPLANCKEN, F.R. & DELGADO-HUERTAS, A. & TRIPP-VALDEZ, A. & ARREOLA-MENDOZA, L. & LARA, A. (2020) Stable isotopic inferences on trophic ecology and habitat use of brown smooth-hound Mustelus henlei in the west coast of Baja California Sur, Mexico. Regional Studies in Marine Science, 40: 101520 https://dx.doi.org/10.1016/j.rsma.2020.101520
PEGADO, T. & BRABO, L. & SCHMID, K. & SARTI, F. & GAVA, T.T. & NUNES, J. & CHELAZZI, D. & CINCINELLI, A. & GIARRIZZO, T. (2020) Ingestion of microplastics by Hypanus guttatus stingrays in the Western Atlantic Ocean (Brazilian Amazon Coast). Marine Pollution Bulletin, in press 111799 https://dx.doi.org/10.1016/j.marpolbul.2020.111799
PÉREZ-ROJAS, J.G. & TORRES-PALACIOS, K. & URIBE, A. & NAVIA, A.F. & MEJÍA-FALLA, P.A. (2020) Evaluation of staining techniques for the observation of growth bands in tropical elasmobranch vertebrae. Scientia Marina, 84 (4): 343-354 https://dx.doi.org/10.3989/scimar.05045.03A
PURUSHOTTAMA, G.B. & RAJE, S.G. & THAKURDAS, AKHILESH, K.V. & KIZHAKUDAN, S.J. & ZACHARIA, P.U. (2020) Reproductive biology and diet composition of Rhynchobatus laevis (Bloch and Schneider, 1801) (Rhinopristiformes:Rhinidae) from the northern Indian Ocean. Indian Journal of Fisheries, 67 (4): 13-23 https://dx.doi.org/10.21077/ijf.2020.67.4.95636-02
PUTRA, M.I.H. & SETYAWAN, E. & LAGLBAUER, B.J.L. & LEWIS, S. & DHARMADI, D. & SIANIPAR, A. & ENDER, I. (2020) Predicting mobulid ray distribution in coastal areas of Lesser Sunda Seascape: Implication for spatial and fisheries management. Ocean & Coastal Management, 198: 105328 https://dx.doi.org/10.1016/j.ocecoaman.2020.105328
REIS, M. & FIGUEIRA, W.F. (2020) Age, growth and reproductive biology of two endemic demersal bycatch elasmobranchs: Trygonorrhina fasciata and Dentiraja australis (Chondrichthyes: Rhinopristiformes, Rajiformes) from Eastern Australia. Zoologia, 37: e49318 https://dx.doi.org/10.3897/zoologia.37.e49318
REISTAD, N.A. & NORRIS, S.B. & RUMBOLD, D.G. (2021) Mercury in neonatal and juvenile blacktip sharks (Carcharhinus limbatus). Part I: exposure assessment. Ecotoxicology, in press https://dx.doi.org/10.1007/s10646-020-02322-0
RIZO-FUENTES, M.A. & CORREA-CARDENAS, C.A. & LASSO, C.A. & MORALES-BETANCOURT, M.A. & BARRAGAN-BARRERA, D.C. & CABALLERO, S. (2020) Phylogeography, genetic diversity and population structure of the freshwater stingray, Paratrygon aiereba (Müller & Henle, 1841) (Myliobatiformes: Potamotrygonidae) in the Colombian Amazon and Orinoco basins. Mitochondrial DNA Part A, 32 (1): 20-33 https://dx.doi.org/10.1080/24701394.2020.1844679
ROBERTS, T.R. (2020) The first two species of South American freshwater stingrays of the genus Potamotrygon, reported from the Orinoco Basin of Colombia by François Roulin in 1829. Aqua, International Journal of Ichthyology, 26 (3-4): 92-112
SANTOS, P.R.S. & ALVES, M.N. & SEVERO, M.M. (2021) Coastal sharks and rays in a marine protected area in southern Brazil. Journal of Fish Biology, in press https://dx.doi.org/10.1111/jfb.14665
SARDENNE, F. & BODIN, N. & MEDIEU, A. & ANTHA, M. & ARRISOL, R. & LE GRAND, F. & BIDEAU, A. & MUNARON, J.M. & LE LOC'H, F. & CHASSOT, E. (2020) Benefit-risk associated with the consumption of fish bycatch from tropical tuna fisheries. Environmental Pollution, 267: 115614 https://dx.doi.org/10.1016/j.envpol.2020.115614
SCANNELLA, D. & GERACI, M.L. & FALSONE, F. & COLLOCA, F. & ZAVA, B. & SERENA, F. & DI MAI, F. & VITALE, S. (2020) A new record of a great white shark, Carcharodon carcharias (Chondrichthyes: Lamnidae) in the Strait of Sicily, Central Mediterranean Sea. Acta Adriatica, 61 (2): 231-238 https://dx.doi.org/10.32582/aa.61.2.13
SCHAEFER, K. & FULLER, D. & CASTILLO-GENIZ, J.L. & GODINEZ-PADILLA, C.J. & DREYFUS, M. & AIRES-DA-SILVA, A. (2021) Post-release survival of silky sharks (Carcharhinus falciformis) following capture by Mexican flag longline fishing vessels in the northeastern Pacific Ocean. Fisheries Research, 234: 105779 https://dx.doi.org/10.1016/j.fishres.2020.105779
SCHAKMANN, M. & BECKER, V. & SØGAARD, M. & JOHANSEN, J.L. & STEFFENSEN, J.F. & DOMENICI, P. (2021) Latencies of mechanically-stimulated escape responses in the Pacific spiny dogfish, Squalus suckleyi. Journal of Experimental Biology, in press https://dx.doi.org/10.1242/jeb.230698
SCHMID, K. & DA SILVA, F.R.M. & DOS SANTOS, B.J.V. & BEZERRA, N.P.A. & GARLA, R.C. & GIARRIZZO, T. (2020) First fish fauna assessment in the Fernando de Noronha Archipelago with BRUVS: Species catalog with underwater imagery. Biota Neotropica, 20 (4): e20201014 https://dx.doi.org/10.1556/1676-0611-bn-2020-1014
SCHWIETERMAN, G.D. & WINCHESTER, M.M. & SHIELS, H.A. & BUSHNELL, P.G. & BERNAL, D. & MARSHALL, H.M. & BRILL, R.W. (2021) The effects of elevated potassium, acidosis, reduced oxygen levels, and temperature on the functional properties of isolated myocardium from three elasmobranch fishes: clearnose skate (Rostroraja eglanteria), smooth dogfish (Mustelus canis), and sandbar shark (Carcharhinus plumbeus). Journal of Comparative Physiology B, 191: 127–141 https://dx.doi.org/10.1007/s00360-020-01328-8
SEIXAS, M.J. & MARTINS, E. & REIS, R.L. & SILVA, T.H. (2020) Extraction and Characterization of Collagen from Elasmobranch Byproducts for Potential Biomaterial Use. Marine Drugs, 18 (12): E617 https://dx.doi.org/10.3390/md18120617
SHERMAN, C.S. & HEUPEL, M.R. & JOHNSON, M. & KAIMUDDIN, M. & QAMAR, L.M.S. & CHIN, A. & SIMPFENDORFER, C.A. (2020) Repeatability of baited remote underwater video station (BRUVS) results within and between seasons. Plos One, 15 (12): e0244154 https://dx.doi.org/10.1371/journal.pone.0244154
SHIPLEY, O.N. & LEE, C.S. & FISHER, N.S. & STERNLICHT, J.K. & KATTAN, S. & STAATERMAN, E.R. & HAMMERSCHLAG, N. & GALLAGHER, A.J. (2021) Metal concentrations in coastal sharks from The Bahamas with a focus on the Caribbean Reef shark. Scientific Reports, 11 (1): 218 https://dx.doi.org/10.1038/s41598-020-79973-w PMCID: PMC7794238
SMALLEGANGE, I.M. & AVILES, M.F. & EUSTACHE, K. (2020) Unusually Paced Life History Strategies of Marine Megafauna Drive Atypical Sensitivities to Environmental Variability. Frontiers in Marine Science, 7: 597492 https://dx.doi.org/10.3389/fmars.2020.597492
SOLDO, A. (2020) Length-weight relationships for the fifty littoral and coastal marine fish species from the Eastern Adriatic sea. Acta Adriatica, 61 (2): 205-210 https://dx.doi.org/10.32582/aa.61.2.9
SOUZA-ARAUJO, J. & SOUZA-JUNIOR, O.G. & GUIMARÃES-COSTA, A. & HUSSEY, N.E. & LIMA, M.O. & GIARRIZZO, T. (2021) The consumption of shark meat in the Amazon region and its implications for human health and the marine ecosystem. Chemosphere, 265: 129132 https://dx.doi.org/10.1016/j.chemosphere.2020.129132
STEFANNI, S. & CATARINO, D. & RIBEIRO, P.A. & FREITAS, M. & MENEZES, G.M. & NEAT, F. & STANKOVIĆ, D. (2021) Molecular Systematics of the Long-Snouted Deep Water Dogfish (Centrophoridae, Deania) With Implications for Identification, Taxonomy, and Conservation. Frontiers in Marine Science, 7: 1126    https://dx.doi.org/10.3389/fmars.2020.588192
STEHMANN, M.F.W. & WEIGMANN, S. & NAYLOR, G.J.P. (2021) First complete description of the dark-mouth skate Raja arctowskii Dollo, 1904 from Antarctic waters, assigned to the genus Bathyraja (Elasmobranchii, Rajiformes, Arhynchobatidae) Marine Biodiversity, 51: 18 https://dx.doi.org/10.1007/s12526-020-01124-1
TIKTAK, G.P. & BUTCHER, D. & LAWRENCE, P.J. & NORREY, J. & BRADLEY, L. & SHAW, K. & PREZIOSI, R. & MEGSON, D. (2020) Are concentrations of pollutants in sharks, rays and skates (Elasmobranchii) a cause for concern? A systematic review. Marine Pollution Bulletin, 160: 111701 https://dx.doi.org/10.1016/j.marpolbul.2020.111701
TUTKEN, T. & WEBER, M. & ZOHAR, I. & HELMY, H. & BOURGON, N. & LERNAU, O. & JOCHUM, K.P. & SISMA-VENTURA, G. (2020) Strontium and Oxygen Isotope Analyses Reveal Late Cretaceous Shark Teeth in Iron Age Strata in the Southern Levant. Frontiers in Ecology and Evolution, 8: 570032 https://dx.doi.org/10.3389/fevo.2020.570032
VAN DER HEEVER, G.M. & VAN DER LINGEN, C.D. & LESLIE, R.W. & GIBBONS, M.J. (2020) Spatial and ontogenetic variability in the diet and trophic ecology of two co-occurring catsharks (Scyliorhinidae) off South Africa. African Journal of Marine Science, 42 (4): 423-438 https://dx.doi.org/10.2989/1814232x.2020.1835713
VANDERWRIGHT, W.J. & BIGMAN, J.S. & ELCOMBE, C.F. & DULVY, N.K. (2020) Gill slits provide a window into the respiratory physiology of sharks. Conservation Physiology, 8 (1): coaa102 https://dx.doi.org/10.1093/conphys/coaa102 PMCID: PMC7720089
WHEELER, C.R. & RUMMER, J.L. & BAILEY, B. & LOCKWOOD, J. & VANCE, S. & MANDELMAN, J.W. (2021) Future thermal regimes for epaulette sharks (Hemiscyllium ocellatum): growth and metabolic performance cease to be optimal. Scientific Reports, 11 (1): 454 https://dx.doi.org/10.1038/s41598-020-79953-0
ZHANG, W. & QIN, P. & GONG, X. & HUANG, L. & WANG, C. & CHEN, G. & CHEN, J. & WANG, L. & LV, Z. (2020) Identification of circRNAs in the Liver of Whitespotted Bamboo Shark (Chiloscyllium plagiosum). Frontiers in Genetic, 11: 596308 https://dx.doi.org/10.3389/fgene.2020.596308 PMCID: PMC7759564
ZHANG, Y. & GAO, H. & LI, H. & GUO, J. & OUYANG, B. & WANG, M. & XU, Q. & WANG, J. & LV, M. & GUO, X. & LIU, Q. & WEI, L. & REN, H. & XI, Y. & GUO, Y. & REN, B. & PAN, S. & LIU, C. & DING, X. & XIANG, H. & YU, Y. & SONG, Y. & MENG, L. & LIU, S. & WANG, JU. & JIANG, Y. & SHI, J. & LIU, SHA. & SABIR, J.S.M. & SABIR, M.J. & KHAN, M. & HAJRAH, N.H. & MING-YUEN & LEE, S. & XU, X. & YANG, H. & WANG, JI. & FAN, G. & YANG, N. & LIU, X. (2020) The White-Spotted Bamboo Shark Genome Reveals Chromosome Rearrangements and Fast-Evolving Immune Genes of Cartilaginous Fish. iScience., 23 (11): 101754 https://dx.doi.org/10.1016/j.isci.2020.101754 PMCID: PMC7677710

Extinct Chondrichthyes:

BALLELL, A. & FERRÓN, H.G. (2021) Biomechanical insights into the dentition of megatooth sharks (Lamniformes: Otodontidae). Scientific Reports, 11: 1232 https://dx.doi.org/10.1038/s41598-020-80323-z
CORTES-SANCHEZ, M. & SIMON-VALLEJO, M.D. & CORRAL, J.C. & LOZANO-FRANCISCO, M.D. & VERA-PELAEZ, J.L. & JIMENEZ-ESPEJO, F.J. & GARCIA-ALIX, A. & DE LAS HERAS, C. & SANCHEZ, R.M. & GARCIA, M.D.B. & BARANDIARAN-MAESTU, I. & MORALES-MUNIZ, A. (2020) Fossils in Iberian prehistory: A review of the palaeozoological evidence. Quaternary Science Reviews, 250: 106676 https://dx.doi.org/10.1016/j.quascirev.2020.106676
DE REZENDE, J.M.P. & FIGUEROA, R.T. & PONCIANO, LCMD & GALLO, V. (2021) A new late devonian fish fauna from Northeastern Brazil. Historical Biology, in press https://dx.doi.org/10.1080/08912963.2020.1868452
EVERAERT, S. & MUNSTERMAN, D.K. & DE SCHUTTER, P.J. & BOSSELAERS, M. & VAN BOECKEL, J. & CLEEMPUT, G. & BOR, T.J. (2020) Stratigraphy and palaeontology of the lower Miocene Kiel Sand Member (Berchem Formation) in temporary exposures in Antwerp (northern Belgium). Geologica Belgica, 23 (3-4): 167-198 https://dx.doi.org/10.20341/gb.2020.025
HODNETT, J.-P. & ELLIOTT, D.K. & SANTUCCI, V.L. (2020) The Holocephalans (Chondrichthyes) of the Mississippian (Visean) Redwall Limestone, Grand Canyon National Park, Arizona. New Mexico Museum of Natural History and Science, Bulletin, 82: 141-144   
KUTSCHER, M. & KANKEL, U. (2020) Haireste (Selachii) in einem Unterkreide-Geschiebe [Remains of a shark from a glacial erratic (Lower Cretaceous, Gault)]. Geschiebekunde aktuell, 36 ( 4): 123-130   
STUMPF, S. & LÓPEZROMERO, F.A. & KINDLIMANN, R. & LACOMBAT, F. & POHL, B.& KRIWET, J. (2021) A unique hybodontiform skeleton provides novel insights into Mesozoic chondrichthyan life. Papers in Palaeontology, in press https://dx.doi.org/10.1002/spp2.1350
TUTKEN, T. & WEBER, M. & ZOHAR, I. & HELMY, H. & BOURGON, N. & LERNAU, O. & JOCHUM, K.P. & SISMA-VENTURA, G. (2020) Strontium and Oxygen Isotope Analyses Reveal Late Cretaceous Shark Teeth in Iron Age Strata in the Southern Levant. Frontiers in Ecology and Evolution, 8: 570032 https://dx.doi.org/10.3389/fevo.2020.570032
VILLALOBOS-SEGURA, E. & KRIWET, J. & VULLO, R. & STUMPF, S. & WARD, D.J. & UNDERWOOD, C.J. (2021) The skeletal remains of the euryhaline sclerorhynchoid †Onchopristis (Elasmobranchii) from the ‘Mid’-Cretaceous and their palaeontological implications. Zoological Journal of the Linnean Society, in press: zlaa166 https://dx.doi.org/10.1093/zoolinnean/zlaa166



DIPPENAAR, S.M. (2020) Lernaeopoda species (Lernaeopodidae: Siphonostomatoida) from South Africa with the redescription of Lernaeopoda musteli Thomson, 1890. Marine Biodiversity, 50: 21 https://dx.doi.org/10.1007/s12526-020-01044-0
DIPPENAAR, S.M. & KALMAN PASSARELLI, J. (2020) A redescription of the female of Lernaeopoda bivia Leigh-Sharpe, 1930 (Lernaeopodidae: Siphonostomatoida) and a first description of the male. Systematic Parasitology 97: 675-679 https://dx.doi.org/10.1007/s11230-020-09933-5
GALLAGHER, K.A. & CAIRA, J.N. (2020) A New Species of Acanthobothrium (Cestoda: Onchoproteocephalidea) from the Smalleye Pygmy Shark, Squaliolus aliae (Chondrichthyes: Squaliformes: Dalatiidae), from Taiwan. Journal of Parasitology, 106 (6): 818-827 https://dx.doi.org/10.1645/20-15
GOLZARIANPOUR, K. & MALEK, M. & GOLESTANINASAB, M. & SARAFRAZI, A. & KOCHMANN, J. (2021) Two new enigmatic species of Rhinebothrium (Cestoda: Rhinebothriidae) from the Persian Gulf: notes on generic traits and host specificity. Systematics and Biodiversity, in press https://dx.doi.org/10.1080/14772000.2020.1832606
SANTOS, J.V. & MARQUES, F.P.L. & TREVISAN, B. (2020) The First Report and Description of a New Species of Rhinebothrium from a Dasyatid Stingray from the Brazilian Northeastern Coast with a Review of the Distribution of the Genus Throughout Endemic Marine Ecoregions. Journal of Parasitology, 106 (6): 809-817 https://dx.doi.org/10.1645/19-194
TREVISAN, B. & CAIRA, J.N. (2020) Three New Species of Rhinebothrium (Cestoda: Rhinebothriidea) from the Leopard Whipray, Himantura leoparda, in Australia Journal of Parasitology, 106 (6): 789-801 https://dx.doi.org/10.1645/19-192
VAN DER SPUY, L. & SMIT, N.J. & SCHAEFFNER, B.C. (2020) Four new species of Acanthobothrium van Beneden, 1849 (Cestoda: Onchoproteocephalidea) from the spotted skate, Raja straeleni Poll, off the Western Cape, South Africa. Folia Parasitologica, 67: 2020.036  https://dx.doi.org/10.14411/fp.2020.036




Megalodons gave birth to large newborns that likely grew by eating unhatched eggs in womb

Date: January 10, 2021
Source: Taylor & Francis Group
Summary: A new study shows that the gigantic Megalodon or megatooth shark, which lived nearly worldwide roughly 15-3.6 million years ago and reached at least 50 feet (15 meters) in length, gave birth to babies larger than most adult humans.

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Future too warm for baby sharks

Date: January 12, 2021
Source: ARC Centre of Excellence for Coral Reef Studies
Summary: As climate change causes the world's oceans to warm, baby sharks are born smaller, exhausted, undernourished and into environments that are already difficult for them to survive in.

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How teeth functioned and evolved in giant mega-sharks

Date: January 13, 2021
Source: University of Bristol
Summary: Researchers find that the evolution of teeth in the giant prehistoric shark Megalodon and its relatives was a by-product of becoming huge, rather than an adaptation to new feeding habits.

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Spectacular fossil discovery: 150 million-year-old shark was one of the largest of its time

Date: January 14, 2021
Source: University of Vienna
Summary: A team led by Sebastian Stumpf from the University of Vienna describes an well-preserved skeleton of the ancient shark Asteracanthus. This rare fossil find comes from the famous Solnhofen limestones in Bavaria, which was formed in a tropical-subtropical lagoon landscape during the Late Jurassic, about 150 million years ago. The almost complete skeleton shows that Asteracanthus was two-and-a-half meters long, which makes this ancient shark one of the largest of its time.

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Southern Africa's most endangered shark just extended its range by 2,000 kilometers

Date: January 26, 2021
Source: Wildlife Conservation Society
Summary: A team of marine scientists has confirmed that southern Africa's most threatened endemic shark - the Critically Endangered shorttail nurse shark (Pseudoginglymostoma brevicaudatum) - has been found to occur in Mozambique; a finding that represents a range extension of more than 2,000 kilometers (1,242 miles).

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