NEWSLETTER 09/2017 04.09.2017

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

Pollerspöck, J. & Straube, N. 2017, Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali), www.shark-references.com, World Wide Web electronic publication, Version 2017

New images for our project "#Toothmorphology" (https://shark-references.com/post/523)!

Three new species and for two species new images!

Please support our project and send your images of teeth or jaws to juergen.pollerspoeck@shark-references.com!

Squalus acanthias LINNAEUS, 1758 new images!
Ginglymostoma cirratum (BONNATERRE, 1788) new images!
Carcharhinus acronotus (POEY, 1860) new!
Carcharhinus albimarginatus (RÜPPELL, 1837) new!
Carcharhinus amblyrhynchos (BLEEKE

Nico (nicolas.straube@shark-references.com) and Jürgen (juergen.pollerspoeck@shark-references.com)



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

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New images at shark-references:

Many thanks to the following persons for the permission to use their images:

Cassie Rigby for the amazing image of an egg case of the Pale spotted catshark (Asymbolus pallidus)

Sebastien Enault from Kraniata for the image of Galeorhinus galeus (School Shark)

Martin Stehmann for images of Dipturus nidarosiensis (STORM, 1881), the Norwegian skate

Muhammad Iqbal, Indonesia for the image of Fluvitrygon oxyrhynchus

Kv Akhilesh and Vinu Jacob for the image of Cruriraja andamanica
João Pedro Fontenelle (JPfishing) for the images of three new described freshwater stingrays (Potamotrygon adamastorPotamotrygon amazonaPotamotrygon garmani)

Nicolas Roberto Ehemann for a image of the endemic Spot-on-spot round ray Urobatis concentricus!

David EbertPaul Clerkin & Jenny Kemper for the images of Chimaera buccanigellaChimaera didierae and Chimaera willwatchi

Vera Schluessel for a image of Chiloscyllium griseum


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.

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:

The Dutch Elasmobranch Society is pleased to host the 21st EEA Annual Scientific Conference from 12-14 October in Amsterdam, the Netherlands. 

14. Tagung der Gesellschaft für Ichthyologie (GfI)
(German fish society)


24. -26. November 2017



Zoologischen Forschungsmuseum Alexander Koenig in Bonn

museum koenig logo

Zoologisches Forschungsmuseum Alexander Koenig, Adenauerallee 160, 53113 Bonn

More at: http://www.ichthyologie.de/index.php/de/gfi-tagungen/gfi-tagung-2017

Indo-Pacific Fish Conference
2-6 October 2017, Tahiti, French Polynesia

João Pessoa, 3-8 June, 2018
The Sharks International Conference is the first truly international event devoted to elasmobranchs, and its first two editions were held respectively in Cairns, Australia in 2010 and Durban, South Africa in 2014. The city of João Pessoa was chosen as the venue for this important event, which will also congregate members of the Brazilian Society for the Study of Elasmobranchs (SBEEL) and the American Elasmobranch Society (AES) in 2018.
João Pessoa, founded in August 5, 1585, is the capital of Paraíba state, northeastern Brazil. It is located in the easternmost portion of the Americas, where a cape named Ponta do Seixas enters the Atlantic Ocean. Its coastline extends for 24 kilometers, with nine beaches. The downtown area and neighbouring municipalities present many historical and tourist sites.
More information and an internet site of the event will soon be available. We hope to have many participants from all over the world.

Extant Chondrichthyes:

BORSA, P. & ARLYZA, I.S. & HOAREAU, T.B. & SHEN, K.-N. (2017): Diagnostic description and geographic distribution of four new cryptic species of the blue-spotted maskray species complex (Myliobatoidei: Dasyatidae; Neotrygon spp.) based on DNA sequences. Chinese Journal of Oceanology and Limnology, in press
New species: Neotrygon bobwardi, Neotrygon malaccensis, Neotrygon moluccensis, Neotrygon westpapuensis
Abstract: Nine morphologically similar but genetically distinct lineages in the blue-spotted maskray species complex, previously Neotrygon kuhlii (Müller and Henle) qualify as cryptic species. Four of these lineages have been previously described as Neotrygon australiae Last, White and Séret, Neotrygon caeruleopunctata Last, White and Séret, Neotrygon orientale Last, White and Séret, and Neotrygon varidens (Garman), but the morphological characters used in the descriptions offered poor diagnoses and their geographic distributions were not delineated precisely. The objective of the present work is to complete the description of the cryptic species in the complex. Here, an additional four lineages are described as new species on the basis of their mitochondrial DNA sequences: Neotrygon bobwardi, whose distribution extends from the northern tip of Aceh to the western coast of Sumatera; Neotrygon malaccensis, sampled from the eastern part of the Andaman Sea and from the Malacca Strait; Neotrygon moluccensis, from the eastern half of the Banda Sea; and Neotrygon westpapuensis from the central portion of northern West Papua. The geographic distributions of N. australiaeN. coeruleopunctataN. orientale, and N. varidens are updated. For each species, a diagnosis is provided in the form of a combination of private or partly-private nucleotides at 2–4 nucleotide sites along a 519-base pair fragment of the CO1 gene. We believe that the present taxonomic revision will provide information relevant to the sound management and conservation of cryptic species of the blue-spotted maskray in the Coral Triangle region.

CLERKIN, P.J. & EBERT, D.E. & KEMPER, J.M. (2017): New species of Chimaera (Chondrichthyes: Holocephali: Chimaeriformes: Chimaeridae) from the Southwestern Indian Ocean. Zootaxa, 4312 (1): 1–37
New species: Chimaera willwatchi, Chimaera didierae, Chimaera buccanigella
Abstract: Three new species of Chimaera are described from the Southwestern Indian Ocean. Chimaera willwatchi sp. nov. is distinguished by its large body, blocky head with square snout, well-defined suborbital ridges, and a strong dorsal spine exceeding first dorsal apex; body brown-purple in color, slight iridescent sheen, heavily mottled around mouth and ventral surface, posterior edge of pelvic fins and first dorsal fin with prominent white margin, and anterior edge of second dorsal fin with white margin. Chimaera didierae sp. nov. can be distinguished by its light tan body color, slender body, short trunk, long tail, relatively robust spine, very small unpaired fins, and extremely deciduous skin.Chimaera buccanigella sp. nov. is distinguished by its light tan body color, stocky body, short trunk, tapering rapidly into a long tail, long, very straight spine, skin not deciduous. The three Chimaera species were collected from seamounts of Walters Shoal, the Madagascar Ridge, and the Southwestern Indian Ridge in an area within 34o30’S–44o05’E and 39o30’S–58o15’E. This is the first record of the genus in the Southwestern Indian Ocean, and brings the global total to 19 species. The new species presented here are distinguishable from their congeners by a combination of coloration, morphology, meristic, and structure of the mitochondrial NADH2 gene.

FONTENELLE, J.P. & DE CARVALHO, M.R. (2017): Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography. Zootaxa, 4310 (1): 1–63
New species: Potamotrygon adamastor, Potamotrygon amazona, Potamotrygon garmani
AbstractPotamotrygon scobina Garman, 1913, described from Cametá, rio Tocantins, lower Amazon basin, is taxonomically reviewed through an extensive morphological study of internal and external features. Specimens identified as P. scobina from different locations of the Amazon basin were also studied. The identity of P. scobina, its morphology, and distribution are redefined. In addition, three new species closely related to P. scobina are described from Brazil: Potamotrygon adamastor, sp. nov., from rio Uraricoera, rio Branco system, upper Amazon basin; Potamotrygon amazona, sp. nov., from rio Juruá, upper Amazon basin; and Potamotrygon garmani, sp. nov., from the mid to upper rio Tocantins. These three new species do not occur sympatrically with P. scobina, as far as known. Together with P. scobina and P. limaiFontenelle, Silva & Carvalho, 2014, the new species have three angular cartilages of different sizes, a condition not seen in any other potamotrygonin (which have either one or two angulars). Diagnostic characters in combination are primarily morphometric proportions, especially tail length and width, dermal denticles and tail thorns (their relative size, number, morphology, and distribution), tooth size and number of rows, and color pattern.

Extinct Chondrichthyes:

LEUZINGER, L. & CUNY, G. & POPOV, E. & BILLON-BRUYAT, J.-P. (2017): A new chondrichthyan fauna from the Late Jurassic of the Swiss Jura (Kimmeridgian) dominated by hybodonts, chimaeroids and guitarfishes. Papers in Palaeontology, in press
New species: Asteracanthus udulfensis
Abstract: The fossil record of chondrichthyans (sharks, rays and chimaeroids) principally consists of isolated teeth, spines and dermal denticles, their cartilaginous skeleton being rarely preserved. Several Late Jurassic chondrichthyan assemblages have been studied in Europe based on large bulk samples, mainly in England, France, Germany and Spain. The first study of this kind in Switzerland is based on controlled excavations in Kimmeridgian deposits related to the construction of the A16 motorway in the Swiss Jura (Porrentruy, NW Switzerland). This study is based on more than 2000 isolated chondrichthyan remains (teeth, dental plates, spines and dermal denticles) and adds to our knowledge of the chondrichthyan distribution at a regional scale in Europe. We describe and identify this new fauna, define a new species of hybodont with crushing-type dentition (Asteracanthus udulfensis sp. nov.) and report for the first time the carcharhiniform Corysodon cirinensis in Switzerland. By the Late Jurassic, modern neoselachian sharks had overtaken hybodonts in European marine realms, the latter being gradually confined to brackish or freshwater environments. However, while the associated fauna of the Porrentruy platform indicates marine conditions, neoselachian sharks are surprisingly rare. The chondrichthyan assemblage is largely dominated by hybodonts, guitarfishes (rays) and chimaeroids that are all known to be euryhaline. This unexpected chondrichthyan faunal composition questions the presence of fresh to brackish water in the vicinity of the platform, and the occurrence of salinity fluctuations within a general context marine. This could explain the scarcity of neoselachian sharks and the extended success of hybodonts in the Porrentruy area as late as the Late Jurassic.


TREVISAN, B. & MARQUES, F.P.L. (2017): Species diversity of Rhinebothrium Linton, 1890 (Eucestoda: Rhinebothriidea) from Styracura (Myliobatiformes: Potamotrygonidae), including the description of a new species. Zootaxa, 4300 (3): 421-437
New species: Rhinebothrium reydai,
Abstract: The present study contributes to the knowledge of the cestode fauna of species of Styracura de Carvalho, Loboda & da Silva, which is the putative sister taxon of freshwater potamotrygonids—a unique group of batoids restricted to Neotropical freshwater systems. We document species of Rhinebothrium Linton, 1890 as a result of the examination of newly collected specimens of Styracura from five different localities representing the eastern Pacific Ocean and the Caribbean Sea. Overall, we examined 33 spiral intestines, 11 from the eastern Pacific species Styracura pacifica (Beebe & Tee-Van) and 22 from the Caribbean species Sschmardae (Werner). However, only samples from the Caribbean were infected with members of RhinebothriumRhinebothrium tetralobatum Brooks, 1977, originally described from Sschmardae—as Himantura schmardae (Werner)—off the Caribbean coast of Colombia based on six specimens is redescribed. This redescription provides the first data on the microthriches pattern, more details of internal anatomy (i.e., inclusion of histological sections) and expands the ranges for the counts and measurements of several features. We describe a new species of Rhinebothrium from Sschmardae collected off the Caribbean coast of Panama. Rhinebothrium reydai n. sp. is diagnosed by possessing four testes per proglottid, acraspedote proglottids, single anterior-most and porterior-most loculi, and bothridia divided into 34–44 loculi. Collectively, these features distinguish the new species from all 41 species of Rhinebothrium currently recognized as valid, with the exception of R. chollaensis Friggens & Duszynski, 2005. The latter species, a parasite of Urobatis halleri (Cooper) from the eastern Pacific Ocean, has a similar morphology in comparison to Rreydai n. sp., but can be distinguished by being apolytic instead of euapolytic and by the morphology of the aporal lobe of the ovary, which reaches the mid-lateral margin of the cirrus sac, whereas in R. reydai n. sp. the aporal lobe only reaches the posterior margin, since the cirrus sac takes approximately ¾ of the proglottid in width. Also, in Rreydai n. sp., the first square proglottid occurs within the anterior third of the strobila (13–30%), whereas in Rchollaensis it occurs near the middle of the strobila (42–62%). Further, we discuss the patterns of infection and biogeographical distribution for species of Rhinebothrium in species of Styracura. The apparent disjunctive distribution of Rtetralobatum and Rreydai n. sp. in the Caribbean Sea throughout their host distribution, S. schmardae, and the absence of species of Rhinebothrium in the eastern Pacific sister-host, Spacifica, reveal the importance of sample size and biogeographical representation for documenting the parasite fauna of host lineages.

PLEASE send your new papers tojuergen.pollerspoeck@shark-references.comor nicolas.straube@shark-references.com   

Latest Research Articles

Extant Chondrichthyes:
AKYOL, O. & AYDıN, I. & EL KAMEL-MOUTALIBI, O. & CAPAPÉ, C. (2017) Bull ray, Aetomylaeus bovinus (Geoffroy Saint-Hilaire, 1817) (Myliobatidae) in the Mediterranean Sea and captures of juveniles from Izmir Bay (Aegean Sea, Turkey). Journal of Applied Ichthyology, in press  http://dx.doi.org/10.1111/jai.13420
ALINEJAD, M. & MOTAMEDZADEGAN, A. & REZAEI, M. & MAC REGENSTEIN, J. (2017) Gelatin Films Containing Hydrolysates from Whitecheek Shark (Carcharhinus dussumieri) Meat. Journal of Aquatic Food Product Technology, 26 (4): 420-430  http://dx.doi.org/10.1080/10498850.2016.1201713
BARKER, A.M. & FRAZIER, B.S. & BETHEA, D.M. & GOLD, J.R. & PORTNOY, D.S. (2017) Identification of young-of-the-year great hammerhead shark Sphyrna mokarran in northern Florida and South Carolina. Journal of Fish Biology, in press  http://dx.doi.org/10.1111/jfb.13356
BITON-PORSMOGUER, S. & BANARU, D. & BOUDOURESQUE, C.F. & DEKEYSER, I. & BEAREZ, P. & MIGUEZ-LOZANO, R. (2017) Compared diet of two pelagic shark species in the northeastern Atlantic Ocean. Vie Et Milieu, 67 (1): 21-25 
BOLDROCCHI, G. & KISZKA, J. & PURKIS, S. & STORAI, T. & ZINZULA, L. & BURKHOLDER, D. (2017) Distribution, ecology, and status of the white shark, Carcharodon carcharias, in the Mediterranean Sea. Reviews in Fish Biology and Fisheries, 27 (3): 515–534  http://dx.doi.org/10.1007/s11160-017-9470-5
BOND, M.E. & VALENTIN-ALBANESE, J. & BABCOCK, E.A. & ABERCROMBIE, D. &  LAMB, N.F. & MIRANDA, A. & PIKITCH, E.K. & CHAPMAN, D.D. (2017) Abundance and size structure of a reef shark population within a marine reserve has remained stable for more than a decade. Marine Ecology Progress Series, 576: 1–10  http://dx.doi.org/10.3354/meps12241
BORSA, P. & ARLYZA, I.S. & HOAREAU, T.B. & SHEN, K.-N. (2017) Diagnostic description and geographic distribution of four new cryptic species of the blue-spotted maskray species complex (Myliobatoidei: Dasyatidae; Neotrygon spp.) based on DNA sequences. Chinese Journal of Oceanology and Limnology, in press  http://dx.doi.org/10.1007%2Fs00343-018-7056-2
BRACCINI, M. & RENSING, K. & LANGLOIS, T. & MCAULEY, R. (2017) Acoustic monitoring reveals the broad-scale movements of commercially important sharks. Marine Ecology Progress Series, 577: 121-129  http://dx.doi.org/10.3354/meps12251
BRACCINI, M. &TAYLOR, S. & BRUCE, B. & MCAULEY, R. (2017) Modelling the population trajectory of West Australian white sharks. Ecological Modelling, 360: 363-377  http://dx.doi.org/10.1016/j.ecolmodel.2017.07.024
BRINTON, C.P. & CURRAN, M.C. (2017) Tidal and diel movement patterns of the Atlantic stingray (Dasyatis sabina) along a stream-order gradient. Marine and Freshwater Research, 68 (9): 1716-1725   http://dx.doi.org/10.1071/MF16073
BYRNE, M.E. & CORTÉS, E. & VAUDO, J.J. & MCN. HARVEY, G.C. & SAMPSON, M. & WETHERBEE, B.M. & SHIVJI. M. (2017) Satellite telemetry reveals higher fishing mortality rates than previously estimated, suggesting overfishing of an apex marine predator. Proceedings of the Royal Society of London, Series B, 284 (1860): 20170658  http://dx.doi.org/10.1098/rspb.2017.0658
CAMUS, A.C. & IBRAHIEM, M.M. & ALHIZAB, F.A. & ABOELLAIL, T.A. & IBRAHIM, A.M. (2017) Poorly differentiated soft tissue sarcoma in an Arabian carpet shark Chiloscyllium arabicum (Gubanov): A case report. Journal of Fish Diseases, in press  http://dx.doi.org/10.1111/jfd.12683
CASTILLO-PAEZ, A. & SANDOVAL-CASTILLO, J. & CORRO-ESPINOSA, D. & AVILA, J.T. & BLANCO-PARRA, M.D. & SAAVEDRA-SOTELO, N.C. & SOSA-NISHIZAKI, O. & GALVAN-MAGANA, F. & ROCHA-OLIVARES, A. (2017) Cutting through the Gordian knot: unravelling morphological, molecular, and biogeographical patterns in the genus Zapteryx (guitarfish) from the Mexican Pacific. ICES Journal of Marine Science, 74 (6): 1630-1638  http://dx.doi.org/10.1093/icesjms/fsx021
CAVALCANTE, D.G. & GALLO, H. & SOUSA, O.M. & AZEVEDO, V.G. & SANCHES, E.G. (2016) Aspectos da Reprodução e Primeiro Registro de Distocia em Raia-ticonha (Rhinoptera bonasus). [First record of dystocia and reproductive aspects in cownose ray (Rhinoptera bonasus)]. Boletim do Instituto de Pesca, São Paulo, 42 (3): 710 – 718 
CLARK, J.A. & BROWN, C. & GILLINGS, M.R. & GARDNER, M. & WILLIAMSON, J.E. & IZZO, C. & DAY, J. (2017) Characterization of 12 polymorphic microsatellite loci in the Port Jackson Shark, Heterodontus portusjacksoni (Meyer, 1793). Marine Biodiversity, in press  http://dx.doi.org/10.1007/s12526-017-0772-6
CLERKIN, P.J. & EBERT, D.E. & KEMPER, J.M. (2017) New species of Chimaera (Chondrichthyes: Holocephali: Chimaeriformes: Chimaeridae) from the Southwestern Indian Ocean. Zootaxa, 4312 (1): 1–37  http://dx.doi.org/10.11646/zootaxa.4312.1.1
COELHO, R. & MEJUTO, J. & DOMINGO, A. & YOKAWA, K. & LIU, K.-M. & CORTÉS, E. & ROMANOV, E.V. & DA SILVA, C. & HAZIN, F. & AROCHA, F. & MWILIMA, A.M. & BACH, P. & DE ZÁRATE, V.O. & ROCHE, W. & LINO, P.G. & GARCÍA-CORTÉS, B. & RAMOS-CARTELLE, A.M. & FORSELLEDO, R. & MAS, F. & OHSHIMO, S. & COURTNEY, D. & SABARROS, P.S. & PEREZ, B. & WOGERBAUER, C. & TSAI, W.-P. & CARVALHO, F. & SANTOS, A.N. (2017) Distribution patterns and population structure of the blue shark (Prionace glauca) in the Atlantic and Indian Oceans. Fish and Fisheries, in press  http://dx.doi.org/10.1111/faf.12238
DALLARES, S. & PEREZ-DEL-OLMO, A. & MONTERO, F.E. & CARRASSON, M. (2017) Composition and seasonal dynamics of the parasite communities of Scyliorhinus canicula (L., 1758) and Galeus melastomus Rafinesque, 1810 (Elasmobranchii) from the NW Mediterranean Sea in relation to host biology and ecological features. Hydrobiologia, 799 (1): 275-291  http://dx.doi.org/10.1007/s10750-017-3226-z
DAPP, D.R. & HUVENEERS, C. & WALKER, T.I. & REINA, R.D. (2017) Physiological response and immediate mortality of gill-net-caught blacktip reef sharks (Carcharhinus melanopterus). Marine and Freshwater Research, 68 (9): 1734-1740  http://dx.doi.org/10.1071/MF16132
DEDMAN, S. & OFFICER, R. & BROPHY, D. & CLARKE , M. & REID, D.G. (2017) Advanced Spatial Modeling to Inform Management of Data-Poor Juvenile and Adult Female Rays. Fishes, 2 (3): 12  http://dx.doi.org/10.3390/fishes2030012
DFO (2017) Evaluation of Scope for Harm for White Shark (Carcharodon carcharias) in Atlantic Canada. DFO Canadian Science Advisory Secretariat Science Response 2017/025.  
DIOGÈNE, J. & REVERTÉ, L. & RAMBLA-ALEGRE, M. & DEL RÍO, V. & DE LA IGLESIA, P. & CAMPÀS, M. & PALACIOS, O. & FLORES, C. & CAIXACH, J. & RALIJAONA, C. & RAZANAJATOVO, I. & PIROG, A. & MAGALON, H. & ARNICH, N. & TURQUET, J. (2017) Identification of ciguatoxins in a shark involved in a fatal food poisoning in the Indian Ocean. Scientific Reports, 7: 8240  http://dx.doi.org/10.1038/s41598-017-08682-8
EHEMANN, N.R. & PÉREZ-PALAFOX, X.A. & PABÓN-ALDANA, K. & MEJÍA-FALLA, P.A. & NAVIA, A.F. & CRUZ-ESCALONA, V.H. (2017) Biological notes on the reef stingray, Urobatis concentricus, an endemic species of Mexico. Journal of Fish Biology, in press  http://dx.doi.org/10.1111/jfb.13398
ELSTON, C. & VON BRANDIS, R.G. & COWLEY, P.D. (2017) Dietary composition and prey selectivity of juvenile porcupine rays Urogymnus asperrimus. Journal of Fish Biology, in press  http://dx.doi.org/10.1111/jfb.13334
EVAGELOPOULOS, A. & BATJAKAS, I. & KOUTSOUBAS, D. (2017) Length-weight relationships of 9 commercial fish species from the North Aegean Sea. Acta Adriatica, 58 (1): 187-192 
FERREIRA, L.C. & THUMS, M. & HEITHAUS, M.R. & BARNETT, A. & ABRANTES, K.G. & HOLMES, B.J. & ZAMORA, L.M. & FRISCH, A.J. & PEPPERELL, J.G. & BURKHOLDER, D. & VAUDO, J. & NOWICKI, R. & MEEUWIG, J. & MEEKAN, M.G. (2017) The trophic role of a large marine predator, the tiger shark Galeocerdo cuvier. Scientific Reports, 7: 7641  http://dx.doi.org/10.1038/s41598-017-07751-2
FONTENELLE, J.P. & DE CARVALHO, M.R. (2017) Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography. Zootaxa, 4310 (1): 1–63  http://dx.doi.org/10.11646/zootaxa.4310.1.1
FREEDMAN, R. & ESPINOZA, M. & VOSS, K.M. & FARRUGIA, T. & WHITCRAFT, C.R. & LOWE, C.G. (2017) Does Estuary Restoration Design Alter the Fine Scale Movements of Gray Smoothhounds (Mustelus californicus) in Southern California? Bulletin of the Southern California Academy of Sciences, 116 (2): 88-97  http://dx.doi.org/10.3160/soca-116-02-88-97.1
FUSS, T. & SCHLUESSEL, V. (2017) The Ebbinghaus illusion in the gray bamboo shark (Chiloscyllium griseum) in comparison to the teleost damselfish (Chromis chromis). Zoology, in press  http://dx.doi.org/10.1016/j.zool.2017.05.006
GULAK, S.J.B. & MONCRIEF-COX, H.E. & MORRELL, T.J. & MATHERS, A.N. (2017) A guide to landing shark species with fins naturally attached. NOAA Technical Memorandum, NMFS-SEFSC-712:   http://dx.doi.org/10.7289/V5/TM-SEFSC-712
HALDAR, V. & CHAKRABORTY, N. (2017) A novel evolutionary technique based on electrolocation principle of elephant nose fish and shark: fish electrolocation optimization. Soft Computing, 21 (14): 3827-3848  http://dx.doi.org/10.1007/s00500-016-2033-1
HARRY, A.V. (2017) Evidence for systemic age underestimation in shark and ray ageing studies. Fish and Fisheries, in press  http://dx.doi.org/10.1111/faf.12243
HOFFMANN, S.L. & WARREN, S.M. & PORTER, M.E. (2017) Regional variation in undulatory kinematics of two hammerhead species: the bonnethead (Sphyrna tiburo) and the scalloped hammerhead (Sphyrna lewini). Journal of Experimental Biology, in press  http://dx.doi.org/10.1242/jeb.157941
HOWEY, L.A. & WETHERBEE, B.M. & TOLENTINO, E.R. & SHIVJI, M.S. (2017) Biogeophysical and physiological processes drive movement patterns in a marine predator. Movement Ecology, 5: 16  http://dx.doi.org/10.1186/s40462-017-0107-z
IQBAL, M. & SETIAWAN, D. & AJIMAN (2017) Presence of Fluvitrygon oxyrhynchus in Sumatra, Indonesia (Chondrichthyes: Dasyatidae). Ichthyological Exploration of Freshwaters, 28 (1):  83-85 
JABADO, R.W. & KYNE, P.M. & POLLOM, R.A. & EBERT, D.A. & SIMPFENDORFER, C.A. & RALPH, G.M. & DULVY, N.K. (2017) The Conservation Status of Sharks, Rays, and Chimaeras in the Arabian Sea and Adjacent Waters. Environment Agency – Abu Dhabi, UAE and IUCN Species Survival Commission Shark Specialist Group, Vancouver, Canada 236 pp.  
KOUBRAK, O. (2016) A future for a forgotten predator: assessment of the global and regional legal frameworks for protection and recovery of the caribbean sawfishes Pristis pristis and Pristis pectinata and recommendations for the course forward. LLM Thesis: Dalhousie University 
LEIGH, S.C. & PAPASTAMATIOU, Y. & GERMAN, D.P. (2017) The nutritional physiology of sharks. Reviews in Fish Biology and Fisheries, 27 (3): 561–585  http://dx.doi.org/10.1007/s11160-017-9481-2
LYONS, K. & CARLISLE, A.B. & LOWE, C.G. (2017) Influence of ontogeny and environmental exposure on mercury accumulation in muscle and liver of male Round Stingrays. Marine Environmental Research, in press  http://dx.doi.org/10.1016/j.marenvres.2017.07.004
MADIGAN, D.J. & BAUMANN, Z. & SNODGRASS, O.E. & DEWAR, H. & BERMAN-KOWALEWSKI, M. & WENIG, K.C. & NISHIKAWA, J. & DUTTON, P.H. & FISHER, N.S. (2017) Assessing Fukushima-derived radiocesium in migratory Pacific predators. Environ Sci Technol., in press  http://dx.doi.org/10.1021/acs.est.7b00680
MARTINS ,M.F. & ODDONE, M.C. (2017) Reproductive biology of Psammobatis rutrum (Chondrichthyes: Arhynchobatidae) in south Brazil, south-west Atlantic. Journal of Fish Biology, in press  http://dx.doi.org/10.1111/jfb.13350
MENDOZA, A. & KELEZ, S. & CHERRES, W.G. & MAGUIÑO, R. (2017) The Largetooth Sawfish, Pristis pristis (Linnaeus, 1758), is not extirpated from Peru: new records from Tumbes. Check List, 13 (4): 261-265  http://dx.doi.org/10.15560/13.4.261
MOLINA, J.M. & BLASINA, G.E. & CAZORLA, A.C.L. (2017) Age and growth of the highly exploited narrownose smooth-hound (Mustelus schmitti) (Pisces: Elasmobranchii). Fishery Bulletin, 115 (3): 365-379  http://dx.doi.org/10.7755/fb.115.37
MOORE, A.B.M. (2017) Are guitarfishes the next sawfishes? Extinction risk and an urgent call for conservation action. Endangered Species Research, 34: 75–88  http://dx.doi.org/10.3354/esr00830
OLIVEIRA, A.T. & ARAUJO, M.L.G. & LEMOS, J.R.G. & SANTOS, M.Q.C. & PANTOJA-LIMA, J. & ARIDE, P.H.R. & TAVARES-DIAS, M. & MARCON, J.L. (2017) Ecophysiological interactions and water-related physicochemical parameters among freshwater stingrays. Brazilian Journal of Biology, 77 (3): 616-621  http://dx.doi.org/10.1590/1519-6984.01816
ONATE-GONZALEZ, E.C. & AMEZCUA, F. & BUSZKIEWICZ, J. & CASTELLANOS-CENDALES, A.L. & AMEZCUA-LINARES, F. (2017) Trophic ecology of the blotched stingray, Urotrygon chilensis (Elasmobranchii: Myliobatiformes: Urotrygonidae), in three areas of the Mexican Pacific.. Acta Ichthyologica et Piscatoria, 47 (2): 185-196  http://dx.doi.org/10.3750/aiep/02099
PADATE, V.P. & RIVONKER, C.U. & ANIL, A.C. & SAWANT, S.S. & VENKAT, K. (2017) New records of marine fishes from the coral reefs and deep waters of Gulf of Mannar, India. Acta Ichthyologica et Piscatoria, 47 (2): 145-161  http://dx.doi.org/10.3750/aiep/02108
PARKINSON, L.A. & ALEXANDER, A.B. & CAMPBELL, T.W. (2017) Variability in hematology of white-spotted bamboo sharks (Chiloscyllium plagiosum) in different living environments. Zoo Biol., in press  http://dx.doi.org/10.1002/zoo.21371
POLO-SILVA, C. & ACEVEDO, G. & SIU, S. & CARVAJAL, J.M. & IXQUIAC, M. & BESSUDO, S. & SUAREZ, A.M. & PUENTES, V. (2017) Morphometric relationships for some species of elasmobranch from tropical eastern Pacific. Journal of Applied Ichthyology, in press  http://dx.doi.org/10.1111/jai.13460
READ, T.D. & PETIT, R.A. & JOSEPH, S.J. & ALAM, M.T. & WEIL, M.R. & AHMAD, M. & BHIMANI, R. & VUONG, J.S. & HAASE, C.P. &  WEBB, D.H. & TAN, M. & DOVE, A.D.M. (2017) Draft sequencing and assembly of the genome of the world's largest fish, the whale shark: Rhincodon typus Smith 1828. BMC Genomics, 18 (1): 532  http://dx.doi.org/10.1186/s12864-017-3926-9
RIGBY, C.L. & WHITE, W.T. & KYNE, P.M. (2017) Description of the egg cases of Dentiraja polyommata (Rajiformes: Rajidae) and Asymbolus pallidus (Carcharhiniformes: Scyliorhinidae) from Queensland, Australia. Zootaxa, 4294 (3): 329–341  http://dx.doi.org/10.11646/zootaxa.4294.3.3
RYAN, J.P. & GREEN, J.R. & ESPINOZA, E. & HEARN, A.R. (2017) Association of whale sharks (Rhincodon typus) with thermo-biological frontal systems of the eastern tropical Pacific. PLoS ONE, 12 (8): e0182599  http://dx.doi.org/10.1371/journal.pone.0182599
SHIFFMAN, D.S. & MACDONALD, C. & GANZ, H.Y. & HAMMERSCHLAG, N. (2017) Fishing practices and representations of shark conservation issues among users of a land-based shark angling online forum. Fisheries Research, 196: 13–26  http://dx.doi.org/10.1016/j.fishres.2017.07.031
SHIPLEY, O.N. & BROOKS, E.J. & MADIGAN, D.J. & SWEETING, C.J. & GRUBBS, R.D. (2017) Stable isotope analysis in deep-sea chondrichthyans: recent challenges, ecological insights, and future directions Reviews in Fish Biology and Fisheries, 27 (3): 481–497  http://dx.doi.org/10.1007/s11160-017-9466-1
TOLOTTI, M. & BAUER, R. & FORGET, F. & BACH, P. & DAGORN, L. & TRAVASSOS, P. (2017) Fine-scale vertical movements of oceanic whitetip sharks (Carcharhinus longimanus). Fishery Bulletin, 115 (3): 380-395  http://dx.doi.org/10.7755/fb.115.3.8
VINU, J. & RAJEESHKUMAR, M.P. & PARMESWARAN, U.V. & SUMOD, K.S. & AKHILESH, K.V. & MANJEBRAYAKATH, H. & SANJEEVAN, V.N. (2017) Redescription and sexual dimorphism of Andaman leg-skate Cruriraja andamanica (Chondrichthyes: Rajiformes) with comments on the zoogeography of the genus Cruriraja. Journal of Fish Biology, 91 (2): 587–602  http://dx.doi.org/10.1111/jfb.13371
WOSNICK, N. & RANGEL, B.S. & MOREIRA, R.A. & FREIRE, C.A. (2017) Clasper flaring in a guitarfish (Zapteryx brevirostris Elasmobranchii, Rhinobatidae) under anesthesia. Veterinary Anaesthesia and Analgesia, in press  http://dx.doi.org/10.1016/j.vaa.2017.04.001

Extinct Chondrichthyes:
AGUILERA, O. & LUZ, Z. & CARRILLO-BRICEÑO, J.D. & KOCSIS, L. & VENNEMANN, T.W. & DE TOLEDO, P.M. & NOGUEIRA, A. & AMORIM, K.N. & MORAES-SANTOS, H. & POLCK, M.R. & DE LOURDES RUIVO, M. & LINHARES, A.P. & MONTEIRO-NETO, C. (2017) Neogene sharks and rays from the Brazilian ‘Blue Amazon’. PLoS ONE, 12 (8): e0182740  http://dx.doi.org/10.1371/journal.pone.0182740
CUNY, G. & MO, J. & AMIOT, R. & BUFFETAUT, E. & SUTEETHORN, S. & SUTEETHORN, V. & TONG, H. (2017) New data on Cretaceous freshwater hybodont sharks from Guangxi Province, South China. Research & Knowledge, 3 (1): 11-15 
FISCHER, J. & KOGAN, I. & POPOV, E. & JANETSCHKE, N. & LICHT, M. (2017) The Late Cretaceous chondrichthyan fauna of the Elbtal Group (Saxony, Germany). Research & Knowledge, 3 (2): 13-17 
TENG, Y.-H. & SONE, M. & HIRAYAMA, R. & YOSHIDA, M. & KOMATSU, T. & KHAMHA, S. & CUNY, G. (2017) First hybodont shark assemblage from the Cretaceous of Malaysia: updated report. Research & Knowledge, 3 (2): 69-70 
IVANOV, A.O. & SEUSS, B. & NÜTZEL, A. (2017) The fish assemblage from the Pennsylvanian Buckhorn Asphalt Quarry Lagerstätte (Oklahoma, USA). Paläontologische Zeitschrift, in press  http://dx.doi.org/10.1007/s12542-017-0361-9
KACHACHA, G. & CUNY, G. & AZAR, D. & SAAD, P.A. (2017) Revision of the fossil batomorphs from the Cretaceous of Lebanon, and their impact on our understanding of the early step of the evolution of the clade. Research & Knowledge, 3 (2): 33-37 
LADWIG, J. (2017) Ein Zahn des lamniformen Haies Carcharomodus escheri (AGASSIZ, 1843) aus dem miozänen Glimmerton von Groß Pampau (Schleswig-Holstein). Arbeitskreis Paläontologie Hannover, 45: 75–77 
LEUZINGER, L. & CUNY, G. & POPOV, E. & BILLON-BRUYAT, J.-P. (2017) A new chondrichthyan fauna from the Late Jurassic of the Swiss Jura (Kimmeridgian) dominated by hybodonts, chimaeroids and guitarfishes. Papers in Palaeontology, in press  http://dx.doi.org/10.1002/spp2.1085
MANZANARES, E. & PLA, C. & FERRÓN, G. & BOTELLA, H. (2017) Middle-Late Triassic chondrichthyans remains from the Betic Range (Spain). Journal of Iberian Geology, in press  

HASELI, M. & BAZGHALEE, M.Z. & PALM, H.W. (2017) Genetic identity of eutetrarhynchids from the Persian Gulf, with intraindividual and intraspecific variability of Prochristianella butlerae Beveridge, 1990. Parasitology International, in press  http://dx.doi.org/10.1016/j.parint.2017.07.007
TREVISAN, B. & MARQUES, F.P.L. (2017) Species diversity of Rhinebothrium Linton, 1890 (Eucestoda: Rhinebothriidea) from Styracura (Myliobatiformes: Potamotrygonidae), including the description of a new species. Zootaxa, 4300 (3): 421-437  http://dx.doi.org/10.11646/zootaxa.4300.3.5



The ocean's fastest shark is being threatened by over fishing

Shortfin mako shark fishing mortality rate is much higher than previously thought
Date: August 7, 2017
Source: Nova Southeastern University
Summary: Study using satellite-tagged shortfin mako sharks shows mortality rates have been dramatically underestimated.
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First successful wild whale shark health assessments performed

The scientific milestone will expand the community's understanding of this endangered species
Date: August 17, 2017
Source: Georgia Aquarium
Summary: For the first time ever, scientists successfully performed health assessments, including collecting blood and biological samples, taking measurements and attaching satellite tracking tags, to a population of wild whale sharks -- the world's largest fish, classified as 'endangered' since 2016. The research advancement, which occurred in Indonesia's remote Cendrawasih Bay, has significant implications for unlocking the mysteries surrounding the overall health of whale sharks -- including the potential impacts of tourism on their health.
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Endangered sharks, rays further threatened by global food markets

Using DNA barcoding technology, University of Guelph researchers discover a majority of the shark fins and manta gills sold around the world are from endangered species.
Date: August 25, 2017
Source: University of Guelph
Summary: A majority of shark fins and manta ray gills sold around the globe for traditional medicines come from endangered species, a study has revealed. Using cutting-edge DNA barcoding technology, researchers found 71 per cent of dried fins and gills collected from markets in Canada, China and Sri Lanka came from species listed as at-risk and therefore banned from international trade.
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Tracking down the whale-shark highway

Date: August 30, 2017
Source: Monterey Bay Aquarium Research Institute
Summary: Researchers recently discovered that whale sharks in the Eastern Tropical Pacific follow fronts -- the dynamic boundaries between warm and cold ocean waters.
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