NEWSLETTER 10/2023 29.10.2023

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

Pollerspöck, J. & Straube, N. 2023, Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali), www.shark-references.com, World Wide Web electronic publication, Version 2023


We started to change our old (and unique!) citation style to adapt to the APA citation style (for information please see: https://www.mendeley.com/guides/apa-citation-guide) to make the usage of references listed in shark references easier and more compatible with a widely accepted reference style adopted by several international scientific journals. The transition is ongoing, so far 26252 (last month: 26178) references are changed.


Since we were asked several times, if we could help distributing chondrichthyan-related job opportunities, we would like to try this out as a new category in the newsletter besides postings on our Facebook page. This category definitely depends on the community sharing job openings, so please do not hesitate and send us vacancies or similar.
Right now, we have four interesting job openings. We will keep it simple and just crosslink:


We welcome our new partner "Science Saves Sharks"!
Science Saves Sharks was established in 2022 by postgraduate genetic students doing research on sharks and rays. The alarming state of shark and ray populations encouraged us to take action by providing an educational platform on social media focused on science-based information on Chondrichthyans. Our aim is to create awareness for these extraordinary creatures as well as foster collaboration between researchers and other organisations. Today, we’ve extended our activities to include fundraiser events and school outreaches, where we hope to inspire future generations to get involved in marine conservation.

Would you like to become a shark-reference partner? Please contact us per E-mail!

Partner in Google-Maps



NEW SECTION: From now on, we will report last month’s most popular three papers from our Shark References Facebook page:

If you would like us to post information about your newly published work, please send us a picture and the paper as a pdf to nicolas.straube@shark-references.com or juergen.pollerspoeck@shark-references.com.

Nr. 1 (107 Likes/Emojis, 60 Shares):

Marramà, G. & Villalobos-Segura, E. & Zorzin, R. & Kriwet, J. & Carnevale, G. 2023 The evolutionary origin of the durophagous pelagic stingray ecomorph. Palaeontology, 66(4), Article e12669
Stingrays (Myliobatiformes) are a diverse clade of batoid fishes commonly known to possess venomous tail stings. Current hypotheses suggest that stingrays experimented with a transition from a benthic to a pelagic/benthopelagic habitat coupled with a transition from a non-durophagous diet to extreme durophagy. However, there is no study detailing macroevolutionary patterns to understand how and when habitat shift and feeding specialization arose along their evolutionary history. A new exquisitely preserved fossil stingray from the Eocene Konservat-Lagerstätte of Bolca (Italy) exhibits a unique mosaic of plesiomorphic features of the rajobenthic ecomorph, and derived traits of aquilopelagic taxa, that helps to clarify the evolutionary origin of durophagy and pelagic lifestyle in stingrays. A scenario of early evolution of the aquilopelagic ecomorph is proposed based on new data, and the possible adaptive meaning of the observed evolutionary changes is discussed. The body plan of †Dasyomyliobatis thomyorkei gen. et sp. nov. is intermediate between the rajobenthic and more derived aquilopelagic stingrays, supporting its stem phylogenetic position and the hypothesis that the aquilopelagic body plan arose in association with the evolution of durophagy and pelagic lifestyle from a benthic, soft-prey feeder ancestor.
Many thanks to Giuseppe Marramà for sharing.
Images by the author and Fabrizio Lavezzi (artworks).

Nr. 2 (88 Likes/Emojis, 11 Shares):

Torres, Y. & Charvet, M. & Faria, V.V. & Charvet, P. (2023) Dots in the dark: dorsal polychromatism in the endemic Xingu Freshwater Stingray. Journal of Zoology, in press
DOI: 10.1111/jzo.13106
Polychromatism refers to the presence of two or more color patterns within a species. Several species exhibit polychromatic patterns, including some elasmobranchs such as the Xingu Freshwater Stingray (Potamotrygon leopoldi), a threatened, endemic freshwater stingray species that is exploited in the international aquarium trade. Analysis of polychromatic patterns can provide insight into evolutionary mechanisms and be a useful tool for monitoring international trade. In this context, the present study analyzed intraspecific color variation in P. leopoldi. A total of 241 individuals collected in two areas along the Xingu River in Brazil were used for the study. Four dorsal color patterns of P. leopoldi were described. Size differences between color classes were statistically significant, suggesting that these color variations are associated with ontogenetic color changes. In addition, two color morphs specific to each locality were identified and described. Moreover, the occurrence of polychromatic forms in a Potamotrygoninae species may contribute to the understanding of diversification in this group, since some mechanisms of speciation are associated with polychromatism. Analysis of color variation in P. leopoldi is expected to help improve trade monitoring, especially given the existence of look-alike species.
Many thanks to Patricia Charvet for sharing her latest paper and the two images of an adult (small white spots) and juvenile (yellow spots) Potamotrygon leopoldi!

Nr. 3 (70 Likes/Emojis, 11 Shares):

Many thanks to K. Silambarasan for sharing:
First record of the crocodile shark Pseudocarcharias kamoharai (Chondrichthyes: Lamniformes) in the coastal waters of Andhra Pradesh, India
The crocodile shark Pseudocarcharias kamoharai is recorded for the first time from the Visakhapatnam waters, Andhra Pradesh, India, based on three female specimens collected in December 2017 from commercial gillnetters. The morphological, morphometric and meristic characteristics of the specimens are provided in the present paper.
Zoosystematica Rossica, Vol. 32, No. 2, pp. 217–222
DOI 10.31610/zsr/2023.32.2.217
Shark references: https://shark-references.com/.../Pseudocarcharias-kamoharai


New Images

Many thanks to the following people for providing images:

Frederik H. Mollen (Elasmobranch Research Belgium) for images of  Torpedo fuscomaculata Peters, 1855

K. Silambarasan for images of Pseudocarcharias kamoharai (Matsubara, 1936)

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:

new entry: Priem, R. (1920) Poissons fossils du Miocène d’Egypte. Burdigalien de Moghara, „Désert libyque“. In Fourtau: Contribution à l’étude des vertébrés miocènes de l’Egypte. Cairo 1920, pp. 8-15.

new entry: Arambourg, C. & Joleaud, L. (1943) Vertébrés fossiles du basin du Niger. Bulletin Direction des Mines, 7, 1–74

new entry:  Arambourg, C. (1954) Les Poissons Crétacés du Jebel Tselfat (Maroc). Notes et Mémoires du Service Géologique du Maroc, 118: 188 pp 18 Taf.

Numano, M. (1993) Some Neogene shark-teeth from Mogami area, Yamagata Prefecture. Applied Geology of Yamagata, 13: 32–49

new entry:  Schmitz, L. (2003) Fischzähne (Neoselachii; Actinopterygii) aus dem Unter-Barremium von NW-Deutschland. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 227, 175–199

Extant Chondrichthyes:

new entry: Trois, E.F. (1877 ) Notizie sopra l'Echinorhinus spinosus osservato per la prima volta nell'Adriatico. Atti del Reale Istituto Veneto di S. L. A., Serie 5(3), 1179-1183

Chu, Y.-T.  (1930) A new species of the swallow ray (Pteroplatea) from China. China Journal, 12(6): 357

new entry: Cipria, G.  (1937) Embrione di Echinorhinus spinosus Gmelin. Memorie R Comitato Talassografico Italiano, 245, 3–7 

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

Deng, S.-M. & Xiong, G.-Q. & Zhan, H.-X. (1988) The deep water fishes of the east China Sea. Xue Lin Publishing house: 356 pp.

new entry: Barry, J.P. & Maher, N. (2000) Observations of the prickly shark, Echinorhinus cookei, from the oxygen minimum zone in Santa Barbara Basin, California. California Fish and Game, 86(3), 213–215

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:


Indo-Pacific Fish Conference and the Australian Society for Fish Biology

20-24 November 2023, Auckland, New Zealand
Keep me updated

We look forward to welcoming you to the University of Auckland, located in the heart of Auckland city.  We invite you to come and meet the people that live and work here, explore our beautiful city and hope that you leave with lasting friends, partnerships and memories.

The Organising Committee look forward to welcoming you to the 11th Indo-Pacific Fish Conference (IPFC) and Annual Conference of the Australian Society for Fish Biology, to be held 20-24 November 2023 at the University of Auckland, New Zealand.

The Indo-Pacific Fish Conference (IPFC), held every four years, is undoubtedly one of the world’s premier ichthyological conferences and is eagerly anticipated by marine, estuarine and freshwater fish enthusiasts alike.

The Australian Society for Fish Biology (ASFB), founded in 1971, aims to promote research, education and management of fish and fisheries across the Indo-Pacific.

We are excited to bring these two conference together in a joint meeting that will reflect the extraordinary biological, environmental and cultural diversity of the vast Indo-Pacific region.

Auckland is a modern city offering a variety of cultural experiences, accommodation and entertainment options for every taste and budget. The city is a key regional hub, with transport connections to multiple cities across New Zealand, Australia, the Pacific and beyond.

The University of Auckland is an internationally recognised university that provides outstanding conference facilities and conference support within easy walking distance of the city centre. An exciting programme of conference field trips will allow attendees to sample the diversity of regional marine and freshwater ecosystems. Before or after the conference, delegates could explore Auckland’s magnificent Hauraki Gulf and its beautiful islands. The jewel of the gulf is Waiheke Island, a haven of vineyards, olive groves, beaches and fine dining, just a 40-minute ferry ride from downtown Auckland. For an exciting day trip, discover the history and sandy coves of Rotoroa Island, explore the open wildlife sanctuary of Tiritiri Matangi Island or climb the volcanic cone of Rangitoto Island for incredible views from the summit. If you have a little more time, travel south for a summer holiday to discover the majestic Milford and Doubtful Sounds, encounter marine life in Abel Tasman National Park, enjoy New Zealand’s beautiful Bay of Islands, or maybe plan a field trip or tropical holiday on one of the many Pacific islands that are only a short flight away from Auckland.

We look forward to welcoming you to Auckland in 2023!


The 8th edition of the
International Meeting on the Valorization and Preservation of Paleontological Heritage (RIV3P8)
November 23 - 25, 2023 (El Jadida - Morocco)


You can, also, download the 1st circular at https://drive.google.com/drive/folders/1jr1QuKXfsuP3_dee7HKoy_7CB8A9s_Fm?usp=share_link

Would you be so kind, dear colleague, to assure a large diffusion around your colleagues paleontologists, archaeologists and prehistorians, and anyone interested in the enhancement and preservation of geoheritage (natural and cultural) from the perspective of sustainable development (see the attached poster).. Many thanks in advance. The registration is open till September 15, 2023.


White Sharks Global

Port Lincoln, South Australia, Australia

Sunday 12th to Friday 17th of November 2023


The organising committee is pleased to announce the upcoming White Sharks Global conference (Sunday 12th – Friday 17th of November 2023) in Port Lincoln, South Australia, home of the world’s first white shark tourism industry.
White Sharks Global is the first international white shark conference in 13 years and will provide a forum for the white shark community and stakeholders to meet, share ideas, and update information and report on recent scientific studies. This conference and associated workshops will facilitate in-depth discussions of key challenges related to white sharks.
For more information visit: whitesharksglobal.com and follow @WhiteSharksGlob or contact info@whitesharksglobal.com
The last white shark-focused conference was in Hawaii 13 years ago in early 2010 and a lot has research and studies have happened since. 
We have planned for five days of conference, with one day free in the middle to allow for a dive trip to the Neptune Islands Group Marine Park. There will be several focused workshops (e.g., supporting the recovery of white shark populations, supporting the management of white shark tourism, managing human-shark conflict), contributed talk sessions (5- and 15-min talks), and poster sessions. Based on previous events and our survey, we are expecting ~150 attendants from across the globe, including research scientists, students, resource managers, public safety officials, wildlife tourism operators, environmental consultants, natural history-based production companies, and television network representatives from countries all over the world such as South Africa, United States, Australia, Mexico, New Zealand, and Canada.
[On behalf of the organising committee: Charlie Huveneers (Australia), Christopher Lowe (California), Alison Towner (South Africa), Oscar Sosa-Nishizaki (Mexico), Lauren Meyer (Australia), and Greg Skomal (northwest Atlantic)]



Extant Chondrichthyes:
Marrero, M. & Pascual-Alayón, P.J. & Martin, M.V. & Casañas, I. & Mafalda, F. & Hernández, M. (2023) Taxonomic status of deep-sea sharks Deania calceus and D. hystricosa (Centrophoridae). Regional Studies in Marine Science, 67, Article 103220
Abstract: The taxonomic status and identification of the deep-sea sharks of the genus Deania have been controversial mainly due to morphological similarities between some of its species. The aim of this work was to update the taxonomic status of Deania hystricosa (and other putative species, such as D. calceus and D. profundorum) and the validity as a true taxa using specimens from the Atlantic (East-Central and Southeast) and the North Atlantic (Cantabrian Sea) as determined by analysis of sequences of COI and 16 S rRNA genes and comparative analysis of meristics of skin on different body parts. Traditionally, individuals of the genus Deania, including D. hystricosaD. quadrispinosaD. calceus and D. profundorum, were classified according to the length of the denticle crown. In our study, this character was found to be significantly dependent on the sexual maturity stage or length of the individual and the area of the body where the denticles were taken. Here, 23 individuals of these species were caught during campaigns carried out in the Atlantic Ocean (East-Central and Southeast) and in the North Atlantic (Cantabrian Sea), in order to be analysed for the mitochondrial genes 16 S ribosomal RNA (16 S rRNA) and cytochrome oxidase subunit I (COI). Phylogenetic analysis of concatenated sequences showed two clearly differentiated groups: one consisting of the species D. profundorum, and the other one consisting of the species belonging to D. calceus and D. hystricosa. The genetic differences measured between D. profundorum group and calceus-hystricosa group (3.9%) were within the range of congeneric species, whereas those differences obtained between D. calceus and D. hystricosa (0.2%) were within the range of intraspecific variation of any of the 3 species analyzed. These results suggest that D. calceus and D. hystricosa are synonyms.

Extinct Chondrichthyes:
no taxonomic news this month!

Munoz, G. & Hernandez, S. & Lopez, Z. (2023) A new parasitic copepod species of Tautochondria (Siphonostomatoida: Hyponeoidae), found in the narrowmouthed catshark Schroederichthys bivius from the Strait of Magellan. Parasitology International, 92, Article 102694
New species: Tautochondria magellanica
Abstract: Hyponeoidae is a copepod family that is rare around the world, with only three species described until now. Recently, a hyponeoid copepod was found in the narrowmouthed catshark, Schroederichthys bivius, from Chile, which has not been formally described. The objective of this study is to describe morphologically a new species of Hyponeoidae, from samples of the Strait of Magellan, Southern Chile. Also, a genetic analysis, based on the COI gene, was used to determine the relatedness of the new hyponeoid species to other copepods from Siphonostomatoida, which were available in the GenBank platform. The new species belongs to the genus Tautochondria and is here described as T. magellanica n. sp. This species differs from T. dolichoura mainly in the presence of long process at each side of the buccal cone, the absence of lobes on the head and short processes on the genital complex. According to the genetic sequences, T. magellanica n. sp. was not closely related to any other species. Therefore, this result confirms that Hyponeoidae is a separate family. However, the relatedness to other genera in Siphonostomatoida is still unknown.

Rangel, L.F. & Elloumi, A. & Quilichini, Y. &  Santos, M.J. & Bahri, S. (2023) Morphological and molecular characterization of Chloromyxum dasyatidis n. sp. (Myxosporea: Chloromyxidae) in the common stingray Dasyatis pastinaca (Linnaeus) from Tunisian waters (Central Mediterranean Sea). Systematic Parasitology, in press
New species: Chloromyxum dasyatidis
Abstract: A new species of Chloromyxum Mingazzini, 1890, C. dasyatidis n. sp., is described from the gallbladder of the elasmobranch fish Dasyatis pastinaca (Linnaeus) from the Mediterranean coast off Tunisia. Mature myxospores were subspherical measuring 13.0 ± 0.3 (12.5–13.9) µm in length, 11.3 ± 0.5 (10.2–12.2) µm in width, and 11.8 ± 0.5 (11.4–12.7) µm in thickness. Four pyriform polar capsules 4.4 ± 0.3 (4.0–4.9) µm long and 3.5 ± 0.3 (3.0–3.8) µm wide. Valves were ornamented by 5 to 7 elevated surface ridges and displayed short caudal filaments. Chloromyxum dasyatidis n. sp. had an overall prevalence of infection of 38.5%, with significant seasonal variation, being more prevalent during summer (60.0%) and autumn (70.8%). Phylogenetically, this species grouped within the Chloromyxum sensu stricto lineage, forming a small clade together with the genetically more similar species C. acuminatum and C. myolibati, both from stingray hosts.
Stephan, D. & Bueno, V.M. & Caira, J.N. (2023) Novelty and Phylogenetic Relationships within the Serendipeidae (Cestoda: “Tetraphyllidea”). Journal of Parasitology, 109(4), 423–435
New species: Nanoduplicibothrium leanneae, Nanoduplicibothrium megaphallum, Duplicibothrium bilai
Abstract: Nanoduplicibothrium n. gen. is erected for the subgroup containing the smallest members of the “tetraphyllidean” family Serendipeidae with bothridia fused lengthwise in 2 pairs that lack both a distinct row of posterior loculi and a cephalic peduncle. Two new species in this genus are described. These are Nanoduplicibothrium leanneae n. gen. n. sp. from Rhinoptera bonasus off South Carolina and Nanoduplicibothrium megaphallum n. sp. from Rhinoptera jayakari off Mozambique. Two species currently assigned to Duplicibothrium are transferred to the new genus as Nanoduplicibothrium paulum n. comb and Nanoduplicibothrium jillae n. comb. and the diagnosis of Duplicibothrium is emended so that it aligns with the revised membership of the group. Duplicibothrium bilai n. sp. is also described from R. jayakari off Mozambique. The description of these species provides formal names for 3 species included in previously published molecular phylogenetic work under the provisional names Duplicibothrium n. sp. 2, Duplicibothrium n. sp. 4, and Duplicibothrium n. sp. 5, respectively. Erection of the new genus substantially reduces the number of instances of congeners in the family parasitizing the same host species because in most instances the pairs of species now represent 1 species each in Nanoduplicibothrium and Duplicibothrium. Sequence data for the D1–D3 region of the 28S rDNA gene were generated for Serendip for the first time from an undescribed species from Aetomylaeus asperrimus collected off Panama. This finding also expands the known host associations of the Serendipeidae beyond the Rhinopteridae to include a species of Myliobatidae. A maximum-likelihood phylogenetic analysis of all species of serendipeids for which data for the D1–D3 region of the 28S rDNA gene are available confirms the reciprocal monophyly of NanoduplicibothriumDuplicibothrium, and Serendip. The phylogenetic placement of the fourth genus in the family—the monotypic Glyphobothrium—remains to be determined.


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

Latest Research Articles

Extant Chondrichthyes:
Abrantes, J. & Varsani, A. & Pereira, P. & Maia, C. & Farias, I. & Verissimo, A. & Neves, F. (2023):  Identification and characterization of a polyomavirus in the thornback skate (Raja clavata). Virology Journal, 20(1), Article 190  https://dx.doi.org/10.1186/s12985-023-02149-1
Boldrocchi, G. & Robinson, D. & Caprodossi, S. & Mancuso, E. & Omar, M. & Schmidt, J.V. (2023):  Annual Recurrence of the Critically Endangered Bowmouth Guitarfish (Rhina ancylostomus) in Djibouti Waters. Biology, 12(10), Article 1302  https://dx.doi.org/10.3390/biology12101302
Boube, T. & Azam, C.S. & Guilbert, A. & Huveneers, C. & Papastamatiou, Y.P. & Mourier, J. & Trujillo, J.E. & Femmami, N. & Kunovsky, A. & Bersani, F. & Laurent, E. & Bousseyroux, A. & Thellier, T. & Follin, Y. & Pavy, T. & Jeandel, V. & Mataarere, A. & Burlot, M. & Bouyeure, J. & Rigoreau, B. & Rigoreau, L. & Lenormand, A. & Chalabi, F. & Hayek, M. & Jeandel, J.M. & Stenger, P.L. (2023):  First insights into the population characteristics and seasonal occurrence of the great hammerhead shark, Sphyrna mokarran (Rüppell, 1837) in the Western Tuamotu archipelago, French Polynesia. Frontiers in Marine Science, 10, Article 1234059  https://dx.doi.org/10.3389/fmars.2023.1234059
Butcher, P.A. & Lee, K.A. & Brand, C.P. & Gallen, C.R. & Green, M. & Smoothey, A.F. & Peddemors, V.M.  (2023):  Capture Response and Long-Term Fate of White Sharks (Carcharodon carcharias) after Release from SMART Drumlines. Biology, 12(10), Article 1329  https://dx.doi.org/10.3390/biology12101329
Cady, T. & Bemis, K.E. & Baeza, J.A. (2023):  The mitochondrial genome of the endangered Spiny Butterfly Ray Gymnura altavela (Linnaeus 1758) (Myliobatiformes: Gymnuridae) provides insights into cryptic lineages. Mitochondrial DNA Part A, in press  https://dx.doi.org/10.1080/24701394.2023.2251577
Cahill, B.V. & Eckert, R.J. & Bassos-Hull, K. & Ostendorf, T.J. & Voss, J.D. & Degroot, B.C. & Ajemian, M.J. (2023):  Diet and Feeding Ecology of the Whitespotted Eagle Ray (Aetobatus narinari) from Florida Coastal Waters Revealed via DNA Barcoding. Fishes, 8(8), Article 388  https://dx.doi.org/10.3390/fishes8080388
Calle-Moran, M.D. & Aragon-Noriega, E.A. (2023):  Reproductive biology of the crocodile shark, Pseudocarcharias kamoharai, in the Ecuadorian Pacific Ocean. Regional Studies in Marine Science, 66, Article 103135  https://dx.doi.org/10.1016/j.rsma.2023.103135
Capape, C. & Reynaud, C. & Hemida, F. (2023):  Occurrence of round fantail stingray Taeniurops grabatus (Chondrichthyes: Dasyatidae) from the Algerian coast (southwestern Mediterranean Sea). Cahiers De Biologie Marine, 64(2), 183–186  https://dx.doi.org/10.21411/cbm.a.1c44b285
Chen, A.L. & Wu, T.H. & Shi, L.F. & Clusin, W.T. & Kao, P.N. (2023):  Calcium-Activated Big-Conductance (BK) Potassium Channels Traffic through Nuclear Envelopes into Kinocilia in Ray Electrosensory Cells. Cells, 12(17), Article 2125  https://dx.doi.org/10.3390/cells12172125
Crawford, L.M. & Gelsleichter, J. & Newton, A.L. & Hoopes, L.A. & Lee, C.-S. & Fisher, N.S. & Adams, D.H. & Giraudo, M. & McElroy, A.E. (2023):  Associations between total mercury, trace minerals, and blood health markers in Northwest Atlantic white sharks (Carcharodon carcharias) Marine Pollution Bulletin, 195, Article 115533  https://dx.doi.org/10.1016/j.marpolbul.2023.115533
Dixon, O.F.L. & Gallagher, A.J. (2023):  Blue carbon ecosystems and shark behaviour: an overview of key relationships, network interactions, climate impacts, and future research needs. Frontiers in Marine Science, 10, Article 1202972  https://dx.doi.org/10.3389/fmars.2023.1202972
Doherty, P.D. & De Bruyne, G. & Moundzoho, B.D. & Dilambaka, E. & Okondza, G.N. & Atsango, B.C. & Ngouembe, A. & Akendze, T.R. & Parnell, R.J. & Cournarie, M. & Malonga, R. & Missamou, A. & Godley, B.J. & Metcalfe, K. (2023):  Artisanal fisheries catch highlights hotspot for threatened sharks and rays in the Republic of the Congo. Conservation Science and Practice, Article e13017  https://dx.doi.org/10.1111/csp2.13017
Dolton, H.R. & Jackson, A.L. & Deaville, R. & Hall, J. & Hall, G. & McManus, G. & Perkins, M.W. & Rolfe, R.A. & Snelling, E.P. & Houghton, J.D.R. & Sims, D.W. & Payne, N.L. (2023):  Regionally endothermic traits in planktivorous basking sharks Cetorhinus maximus. Endangered Species Research, 51, 227–232  https://dx.doi.org/10.3354/esr01257
Dominguez-Sanchez, P.S. & Sirovic, A. & Fonseca-Ponce, I.A. & Zavala-Jimenez, A.A. & Rubin, R.D. & Kumli, K.R. & Ketchum, J.T. & Galvan-Magana, F. & Wells, R.J.D. & Stewart, J.D. (2023):  Occupancy of acoustically tagged oceanic manta rays, Mobula birostris, in Bahia de Banderas, Mexico. Marine Biology, 170(10), Article 128  https://dx.doi.org/10.1007/s00227-023-04278-1
Enríquez-García, A.B. & Cruz-Escalona, V.H. & Carriquiry, J.D. & Ehemann, N.R. & Mejía-Falla, P.A. & Marín-Enríquez, E. & Treinen-Crespo, C. & Vélez-Tacuri, J.R. & Navia, A.F. (2023):  Trophic assessment of three sympatric batoid species in the Southern Gulf of California. PeerJ, 11, Article e16117  https://dx.doi.org/10.7717/peerj.16117
Germon, I. & Delachanal, C. & Mougel, F. & Martinand-Mari, C. & Debiais-Thibaud, M. & Borday-Birraux, V. (2023):  Interference with the retinoic acid signalling pathway inhibits the initiation of teeth and caudal primary scales in the small-spotted catshark Scyliorhinus canicula. Peerj, 11, Article e15896  https://dx.doi.org/10.7717/peerj.15896
Grant, M.I. & Kyne, P.M. & James, J. & Hu, Y. & Mukherji, S. & Amepou, Y. & Baje, L. & Chin, A. & Johnson, G. & Lee, T.G. & Mahan, B. & Wurster, C. & White, W.T. & Simpfendorfer, C.A. (2023):  Elemental analysis of vertebrae discerns diadromous movements of threatened non-marine elasmobranchs. Journal of Fish Biology, in press  https://dx.doi.org/10.1111/jfb.15537
Hagood, M.E. & Alexander, J.R.S. & Porter, M.E. (2023):  Relationships in Shark Skin: Mechanical and Morphological Properties Vary between Sexes and among Species. Integrative and Comparative Biology, Article icad111  https://dx.doi.org/10.1093/icb/icad111
Hernandez-Aparicio, A. & Galvan-Magana, F. & Simental-Anguiano, M.D. (2023):  Feeding habits of the sharpnose shark Rhizoprionodon longurio on the west coast of the Gulf of California, Mexico. Journal of the Marine Biological Association of the United Kingdom, 103, Article e66  https://dx.doi.org/10.1017/s0025315423000553
Horton, T.W. & Exeter, O. & Garzon, F. & Gordon, C. & Hood, A. & Righton, D. & Witt, M.J. & Hawkes, L.A. & Silva, J.F. (2023):  Best practices for catch-and-release shark angling: current scientific understanding and future research. Fisheries Research, 267, Article 106760  https://dx.doi.org/10.1016/j.fishres.2023.106760
Kiyatake, I. & Johnson, T.L. & Cottrant, E. & Kitadani, Y. & Onda, K. & Murata, M. & Drobniewska, N.J. & Paulet, T.G. & Nishida, K. (2023):  A comparison of the growth and development of pyjama sharks (Poroderma africanum) in wild and captive populations. Journal of Fish Biology, in press  https://dx.doi.org/10.1111/jfb.15555
Kurbanov, Y.K. & Vinogradskaya, A.V. (2023):  First Data on Ecology and Biology of Arctoraja sexoculata (Arhynchobatidae) from the Area off Kuril Islands. Journal of Ichthyology, 63, 697–706  https://dx.doi.org/10.1134/S0032945223040124
Kurtay, E. & Akyol, O. & Özgül, A. & Capapé, C. (2023):  Record of a bull ray Aetomylaeus bovinus (Myliobatidae) in a sea-cage tuna farm in the Aegean coast of Türkiye (Eastern Mediterranean Sea). Journal of the Black Sea Mediterranean Environment, 29(2), 217-223
Leurs, G. & Verkuil, Y.I. & Hijner, N. & Saalmann, F. & Dos Santos, L. & Regalla, A. & Pontes, S.L. & Yang, L. & Naylor, G.J.P. & Olff, H. & Govers, L.L. (2023):  Addressing data-deficiency of threatened sharks and rays in a highly dynamic coastal ecosystem using environmental DNA. Ecological Indicators, 154, Article 110795  https://dx.doi.org/10.1016/j.ecolind.2023.110795
Li, C.-Y.J. & Tsai, W.-P. & Ranatunga, R.R.M.K.P. & Samidon, M. & Liu, S.Y.V. (2023):  Genetic stock structure of the silky shark Carcharhinus falciformis in the Indo-Pacific Ocean. PLoS ONE, 18(10), Article e0292743  https://dx.doi.org/10.1371/journal.pone.0292743
Liu, Z.F. & Niu, Y.Y. & Fu, Z. & Dean, M. & Fu, Z.Y. & Hu, Y.M. & Zou, Z.Y. (2023):  3D relationship between hierarchical canal network and gradient mineralization of shark tooth osteodentin. Acta Biomaterialia, 168, 185–197  https://dx.doi.org/10.1016/j.actbio.2023.07.007
Marrero, M. & Pascual-Alayón, P.J. & Martin, M.V. & Casañas, I. & Mafalda, F. & Hernández, M. (2023):  Taxonomic status of deep-sea sharks Deania calceus and D. hystricosa (Centrophoridae). Regional Studies in Marine Science, 67, Article 103220  https://dx.doi.org/10.1016/j.rsma.2023.103220
Mead, L.R. & Alvarado, D.J. & Meyers, E. & Barker, J. & Sealey, M. & Caro, M.B. & Toledo, H. & Pike, C. & Gollock, M. & Piper, A. & Schofield, G. & Herraiz, E. & Jacoby, D.M.P. (2023):  Spatiotemporal distribution and sexual segregation in the Critically Endangered angelshark Squatina squatina in Spain’s largest marine reserve. Endangered Species Research, 51, 233–248  https://dx.doi.org/10.3354/esr01255
Micarelli, P. & Reinero, F.R. & Marsella, A. & Vernelli, E. & Vittorini, E. & Monteleone, L. & Vailati, M. & Marsili, L. & Tinti, F. & Sperone, E.  (2023):  Attempts to locate and sample the white shark, Carcharodon carcharias (Lamniformes: Lamnidae), along the Italian coasts in the Mediterranean Sea. Acta Adriatica, 64, in press  https://dx.doi.org/10.32582/aa.64.2.6
Navia, A.F. & Tobón-López, A. & Segura, C.E. & Córdoba, D.F. & Amariles, D.F. & Caicedo, J.A. & Mejía-Falla, P.A. (2023):  Confirmación de la presencia y distribución latitudinal de Echinorhinus cookei en la zona costera del Pacífico Oriental Tropical [Confirmation of the presence and latitudinal distribution of Echinorhinus cookei in the coastal zone of the Tropical Eastern Pacific]. Boletín de Investigaciones Marinas y Costeras, 52 (2), 173–178  https://dx.doi.org/10.25268/bimc.invemar.2023.52.2.1276
Nijman, V. (2023):  Illegal Trade in Protected Sharks: The Case of Artisanal Whale Shark Meat Fisheries in Java, Indonesia. Animals, 13(16), Article 2656  https://dx.doi.org/10.3390/ani13162656
Oliveira, M.M.E. & Lopes, A.P. & Pinto, T.N. & da Costa, G.L. & Goes-Neto, A. & Hauser-Davis, R.A. (2023):  A Novel One Health Approach concerning Yeast Present in the Oral Microbiome of the Endangered Rio Skate (Rioraja agassizii) from Southeastern Brazil. Microorganisms, 11(8), Article 1969  https://dx.doi.org/10.3390/microorganisms11081969
Palandacic, A. & Kapun, M. & Greve, C. & Schell, T. & Kirchner, S. & Kruckenhauser, L. & Szucsich, N. & Bogutskaya, N. (2023):  From historical expedition diaries to whole genome sequencing: A case study of the likely extinct Red Sea torpedo ray. Zoologica Scripta, in press  https://dx.doi.org/10.1111/zsc.12632
Rafrafi-Nouira, S. & Cherif, M. & Reynaud, C. & Capape, C. (2023):  Captures of common angelshark Squatina squatina (Squatinidae) from the northern Tunisian coast (Central Mediterranean Sea). Cahiers De Biologie Marine, 64(3), 203–207  https://dx.doi.org/10.21411/cbm.a.7e50396f
Shipley, O.N. & Olin, J.A. & Scott, C. & Camhi, M. & Frisk, M.G. (2023):  Emerging human-shark conflicts in the New York Bight: A call for expansive science and management. Journal of Fish Biology, in press  https://dx.doi.org/10.1111/jfb.15539
Silambarasan, K. & Kar, A.B. & Prasad, G.V.A. & Pattnayak, S.K. (2023):  First record of the crocodile shark Pseudocarcharias kamoharai (Chondrichthyes: Lamniformes) in the coastal waters of Andhra Pradesh, India Zoosystematica Rossica, 32(2), 217–222  https://dx.doi.org/10.31610/zsr/2023.32.2.217
Song, N. & Ma, S.Y. & Zhao, X. & Zhao, J.B. & Zhao, L.L. (2023):  Genomic Characteristics of Okamejei kenojei and the Implications to Its Evolutionary Biology Study. Marine Biotechnology, in press  https://dx.doi.org/10.1007/s10126-023-10242-3
Thomas, P.A. & Peele, E.E. & Yopak, K.E. & Brown, C. & Huveneers, C. & Gervais, C.R. & Kinsey, S.T. (2023):  Intraspecific variation in muscle growth of two distinct populations of Port Jackson sharks under projected end-of-century temperatures. Comparative Biochemistry and Physiology a-Molecular & Integrative Physiology, 283, Article 111467  https://dx.doi.org/10.1016/j.cbpa.2023.111467
Tserkova, F.M. & Mihneva, V.V. & Petrova-Pavlova, E.P. (2023):  Biological Parameters and Biomass and Abundance Indices of Two Demersal Species, Turbot (Scophthalmus maximus) and Thornback Ray (Raja clavata), Estimated by a Trawl Survey in Western Black Sea. Fishes, 8(8), Article 400  https://dx.doi.org/10.3390/fishes8080400
Vaz, D.F.B. & Avery, T.M. & Gabler-Smith, M.K. & Lauder, G.V. (2023):  The Denticle Multiverse: Morphological Diversity of Placoid Scales across Ontogeny in the Portuguese Dogfish, Centroscymnus coelolepis, and Its Systematic Implications. Diversity, 15(11), Article 1105 j  https://dx.doi.org/10.3390/d15111105
Veron, P. & Rozanski, R. & Marques, V. & Joost, S. & Deschez, M.E. & Trenkel, V.M. & Lorance, P. & Valentini, A. & Polanco, F.A. & Pellissier, L. & Eme, D. & Albouy, C. (2023):  Environmental DNA complements scientific trawling in surveys of marine fish biodiversity. ICES Journal of Marine Science, in press  https://dx.doi.org/10.1093/icesjms/fsad139
Yacoubi, L. & El Zrelli, R.B. & Hsu, H.H. & Lin, Y.J. & Savoca, D. & Gopalan, J. & Nazal, M. & Bhuyan, M.S. & Arculeo, M. & Rabaoui, L.J. (2023):  Bioaccumulation of trace elements and hydrocarbons in chondrichthyans of the western Arabian Gulf: Environmental and human health risk assessment and implications for conservation. Science of the Total Environment, 901, Article 165990  https://dx.doi.org/10.1016/j.scitotenv.2023.165990
Zhu, J.Z. & Geng, Z. & Zhu, J.F. & Richard, K. (2023):  Reproductive Biology and Distribution of the Blue Shark (Prionace glauca) in the Western Indian Ocean. Biology, 12(8), Article 1128  https://dx.doi.org/10.3390/biology12081128

Extinct Chondrichthyes:
Clinton, J.M. Visaggi, C.C. & Perez, V.J. & Tweet, J.S. & Santucci, V.L. (2023):  Fossil chondrichthyans and other new paleontological resources at gulf islands national seashore. New Mexico Museum of Natural History and Science Bulletin, 94, 143–154
Collareta, A. & Casati, S. & Di Cencio, A. (2023):  The Palaeobiology of the False Mako Shark, Parotodus benedenii (Le Hon, 1871): A View from the Pliocene Mediterranean Sea. Journal of Marine Science and Engineering, 11(10), Article 1990  https://dx.doi.org/10.3390/jmse11101990
Collareta, A. & Casati, S. & Di Cencio, A. & Bianucci, G. (2023):  The Deep Past of the White Shark, Carcharodon carcharias, in the Mediterranean Sea: A Synthesis of Its Palaeobiology and Palaeoecology.  Life, 13, Article 2085  https://dx.doi.org/10.3390/life13102085
Cortés, D. & Larsson, H.C.E. (2023):  Top of the food chains: an ecological network of the marine Paja Formation biota from the Early Cretaceous of Colombia reveals the highest trophic levels ever estimated. Zoological Journal of the Linnean Society, in press, zlad092  https://dx.doi.org/10.1093/zoolinnean/zlad092
de Lange, B. & Chenal, E. & Diependaal, H.J. & Reumer, J.W.F. (2023):  Fish remains from the Rhaetian (Late Triassic) of Winterswijk, the Netherlands (Pisces: Chondrichthyes and Actinopterygii). Netherlands Journal of Geosciences, 102, Article e10  https://dx.doi.org/10.1017/njg.2023.10
Feichtinger, I. & Pollerspöck, J. & Kranner, M. & Ćorić, S. & Auer, G. & Guinot, G. & Harzhauser, M. (2023):  “The Land That Time Forgot” – Was geschah an der K/Pg Grenze in Waidach (Österreich). Book of Abstracts, 28. Jahrestagung ÖPG, Wien, 23.–24.11.2023
Greenfield, T. (2023):  Of Megalodons and Men: Reassessing the ‘Modern Survival’ of Otodus Megalodon: Refuting the ‘modern survival’ of Otodus megalodon. Journal of Scientific Exploration, 37(3), 330–347  https://dx.doi.org/10.31275/20233041
Hodnett, J.-P.M. & Muskelly, C.O. & Shell, R.C. & Deline, B. (2023):  Early-middle mississippian Stethacanthus (Chondrichthyes; Symmoriiformes) from the Lavender Shale Member of the Fort Payne Formation, northwestern Georgia. New Mexico Museum of Natural History and Science Bulletin, 94, 227–231
Li, J.C. & Sun, Z.Y. & Cuny, G. & Jiang, D.Y. (2023):  Early Triassic chondrichthyans from the Zuodeng Section, Guangxi Province, South China: Palaeobiological and palaeobiogeographical implications. Palaeogeography Palaeoclimatology Palaeoecology, 624, Article 111635  https://dx.doi.org/10.1016/j.palaeo.2023.111635
Pollerspöck, J. & Nielsen, K.A. & Feichtinger, I. & Straube, N. (2023):  Extinct meets Extant – Eocene echinorhiniform sharks from Denmark [Poster abstract]. Book of Abstracts, 28. Jahrestagung ÖPG, Wien, 23.–24.11.2023
Villafaña, J.A. & Chávez-Hoffmeister, M.F. & Cumplido, N. & Campos-Medina, J. & Oyanadel-Urbina, P. & Rivadeneira, M.M. (2023):  The fossil distribution of two pelagic lamniform sharks Alopias vulpinus and Lamna nasus, from South America. Historical Biology, in press  https://dx.doi.org/10.1080/08912963.2023.2259409

Morales-Ávila, J.R. & Jaime-Rivera, M. & Hernández-Saavedra, N.Y. & Leyva-Valencia, I. & Salinas-Zavala, C.A. & Hernández-Trujillo, S. & Palm, H.W. (2023):  Insights into the trophic interactions of the endemic shark Cephalurus cephalus: diet composition and first infection records of Anisakis and other nematodes. Marine Biodiversity, 53, Article 69  https://dx.doi.org/10.1007/s12526-023-01375-8
Rangel, L.F. & Elloumi, A. & Quilichini, Y. &  Santos, M.J. & Bahri, S. (2023):  Morphological and molecular characterization of Chloromyxum dasyatidis n. sp. (Myxosporea: Chloromyxidae) in the common stingray Dasyatis pastinaca (Linnaeus) from Tunisian waters (Central Mediterranean Sea). Systematic Parasitology, in press  https://dx.doi.org/10.1007/s11230-023-10111-6
Stephan, D. & Bueno, V.M. & Caira, J.N. (2023):  Novelty and Phylogenetic Relationships within the Serendipeidae (Cestoda: “Tetraphyllidea”). Journal of Parasitology, 109(4), 423–435  https://dx.doi.org/10.1645/22-124
Warren, M.B. & Bullard, S.A. (2023):  Systematic Revision of the Fish Blood Flukes with Diagnoses of Chimaerohemecidae Yamaguti, 1971, Acipensericolidae N. Fam., Sanguinicolidae Poche, 1926, Elopicolidae N. Fam., and Aporocotylidae Odhner, 1912. Journal of Parasitology, 109(4), 401–418  https://dx.doi.org/10.1645/23-13


Beyond Jaws

New episode of the podcast Beyond Jaws!

In this episode of the Beyond Jaws podcast, co-hosts Andrew Lewin and Dr. David Ebert discuss their love for books and introduce a book called "The Lives of Sharks" by Daniel Abel and Dr. Dean Grubbs. They invite Dean onto the show to discuss the book, its unique approach, and what sets it apart from other shark books. The hosts also explore the history and growth of shark science, from the early misconceptions to the public's fascination with sharks fueled by the movie "Jaws." Tune in to learn more about the fascinating world of sharks and the work of shark scientists.


Both Beyond Jaws audio and video shows can be followed and subscribed. Beyond Jaws is supported by the Save Our Seas Foundation.


Watch how hammerhead sharks get their hammer

Date: September 28, 2023
Source: University of Florida
Summary: The first-ever look at hammerhead shark development shows how they develop their hammer in stunning detail.

Tens of thousands of endangered sharks and rays caught off Congo

Date: October 11, 2023
Source: University of Exeter
Summary: Tens of thousands of endangered sharks and rays are caught by small-scale fisheries off the Republic of the Congo each year, new research shows.


New IUCN Shark News Newsletter is out!
Download: https://www.iucnssg.org/shark-news.html