NEWSLETTER 05/2022 16.05.2022

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

Pollerspöck, J. & Straube, N. 2022, Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali), www.shark-references.com, World Wide Web electronic publication, Version 2022


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 21794 (last month: 21713) references are changed.


NEW VERSION 10_2021!
New database report published by team shark-references!
NEW VERSION 10_2021!
- You want to know how many species of sharks, rays and chimaeras there are?
- You want to know the distribution of species among the orders or families?
- You want to know the references of the first descriptions?
- You want a list of all sharks, rays and chimaeras ever described with their synonyms?

Our new data report can answer all these questions for you!
Abstract: The table and provided download links below are intended for informational use in Chondrichthyan research. The allocation aims for faciliating to find species numbers and most recent information on taxonomic changes. We will regularly update the table and download links at lest twice annually. The updates will be announced on facebook (https://www.facebook.com/sharkreferences) and in our monthly newsletter (sign up here: https://eepurl.com/sJNGb). The Excel sheet allows for the application of individual filter- and sorting options. The list of described spsecies complements taxonomic information for the list of valid species by providing synonyms and / or new taxonomic combinations.



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

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New Images

Many thanks to the following people for providing images:

Frederik Mollen, Elasmobranch Research, Belgium for images of Rajella fyllae (Lütken, 1887)

Adam Anderson,  for images of Heptranchias howellii (Reed, 1946) and Dracipinna bracheri Pollerspöck & Straube, 2022

Jesco Seifert for images of 
Squalus megalops (Macleay, 1881)
Squatina legnota Last & White, 2008
Orectolobus japonicus Regan, 1906
Squatina nebulosa Regan, 1906
Heterodontus zebra (Gray, 1831)
Lamiopsis temminckii (Müller & Henle, 1839)
Glyphis glyphis (Müller & Henle,1838)
Glyphis gangeticus (Müller & Henle, 1839)
Carcharhinus galapagensis (Snodgrass & Heller, 1905)

Chris Taklis for images of Dasyatis pastinaca (Linnaeus, 1758)

Jean-Francois Lhomme (www.vertebres-fossiles.com) for images of
Striatolamia macrota (Agassiz, 1838)
Macrorhizodus americanus (Leriche, 1942)
Nebrius thielensis (Winkler, 1874)


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:

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

Bassani, F. (1878) Ittiodontoliti del Veneto. Atti Accademia Scientifica Veneto-Trentino-Istriana, 5, 275–308

de Stefano, G. (1914) Osservazione sulle piastre dentarie di alcuni Myliobatis viventi e fossili.    Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano, 53: 73–164, 13 fig., pl. 3–6.

Leriche, M. (1937) Sur les restes de poissons recueillis dans les terrains secondaires des Karpates polonaises. Bulletin du Service Géologique de Pologne, 8(4): 205–207, pl. 31

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

Extant Chondrichthyes:

Marini, T.L.  (1935) Nota sobre una raya argentina. Physis, 11(40): 503–506

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

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.

Guitart-Manday, D.J.  (1972) Un nuevo género y especies de tiburón de la Familia Triakidae. Poeyana(Ser.A), 1972(99): 1–4

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.

Crane, N.L. & Heine, J.N. (1992) Observations of the prickly shark (Echinorhinus cookei) in Monterey Bay, California. California Fish and Game, 78(4), 166–168

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:

11th International Cretaceous Symposium Warsaw, Poland, 2022

August 22-26

Abstract submission deadline
30th April 2022

Early Bird Fees 
15th May 2022

3rd circular with detailed programme 
c. 15th July 2022

Field trip registration deadline  
31st May 2022


37th Annual Scientific Meeting American Elasmobranch Society (AES)
July 27 – 31, 2022 (Dates subject to change)
Spokane, WA, USA
elasmo.org asih.org/meetings
The American Elasmobranch Society is a non-profit organization that seeks to advance the scientific study of living and fossil sharks, skates, rays, and chimaeras, and the promotion of education, conservation, and wise utilization of natural resources. The Society holds annual meetings and presents research reports of interest to professionals and students of elasmobranch biology. Those meetings are held in conjunction with annual meetings of the American Society of Ichthyologists and Herpetologists each year at rotating North American venues.


5th International Marine ProtectedAreas Congress (IMPAC5)
September 1 – 8, 2022 Vancouver, Canada
International Marine Protected Areas Congresses (IMPAC) are an opportunity for the global community of marine conservation managers and practitioners to exchange knowledge, experience and best practices to strengthen the conservation of marine biodiversity and to protect the natural and cultural heritage of the ocean. IMPAC5 will be jointly hosted by the Host First Nations — Musqueam Indian Band, Squamish Nation, and Tsleil-waututh Nation — together with the Province of British Columbia, the Government of Canada, the Canadian Parks and Wilderness Society (CPAWS) and the International Union for the Conservation of Nature (IUCN). IMPAC5 is an opportunity to bring together Indigenous peoples and cultures from around the world to embrace a collaborative approach and learn from Indigenous leadership in ocean conservation. Join thousands of marine protected area professionals from around the world to chart a course towards protecting 30% of the ocean by 2030. Learn about traditional marine protection practices and innovative sustainability initiatives from local and international indigenous experts.


Sharks International Conference 2022 (SI2022)
October 10 – 14, 2022 (online virtual conference)
October 20 – 22, 2022 (physical in-person conference)
Valencia, Spain
SI2022 is a hybrid event in October 2022 that will bring together a strong community of people from across the world interested in sharks and rays, all in the name of addressing the challenge of elasmobranch conservation in this Decade of Ocean Science. In association with the European Elasmobranch Association (EEA) and hosted by the Shark Trust, Submon, and Lamna, the event will include five online days (October 10- 14th) featuring enhanced digital content on key themes in shark conservation, leading up to a three-day physical conference in Valencia (October 20th-22nd). The conference is funded by the Save our Seas Foundation and will be based out of L’Oceanogràfic, the largest aquarium in Europe, and streamed live across the world. If you are interested in sharks and rays and want to be a part of the 300+ member community currently shaping SI2022, sign up to the portal at si2022.org. Join this year to be automatically entitled to a 10% discount when tickets become available.




Extant Chondrichthyes:

no taxonomic news this month

Extinct Chondrichthyes:
no taxonomic news this month

Ben Saad, C. & Suthar, J. & Theisen, S. & Palm, H.W. & Gargouri, L. (2022): Echinocephalus caniculus n. sp. (Nematoda: Gnathostomatidae Railliet, 1895) from the lesser spotted dogfish Scyliorhinus canicula (L.) (Elasmobranchii: Scyliorhinidae Gill, 1862) off Tunisia, with a key to species of the genus EchinocephalusSystematic Parasitology, in press
New species: Echinocephalus caniculus
AbstractEchinocephalus caniculus n. sp. (Nematoda, Gnathostomatidae Railliet, 1895) was isolated from the spiral valve of the lesser spotted dogfish Scyliorhinus canicula (L.) from the waters off Kalaat El Andalous, North East Tunisia. This new species is mainly characterized by a cephalic bulb armed with 31–39 transverse rows of uncinated hooks, a comparatively long oesophagus, short spicules and the presence of a gubernaculum. The new species differs from its congeners by having four cervical sacs of almost equal length, a higher oesophagus/body length ratio, the arrangement of the caudal papillae, the absence of a medioventral preanal organ and numerous scattered `pores´ limited to the lateral side of the posterior part of the body. This is the first report of a member of the genus Echinocephalus Molin, 1858 from the Tunisian coast, and a new host and locality record for the Gnathostomatidae. A key to the species of Echinocephalus is provided.


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

Latest Research Articles

Extant Chondrichthyes:
Araujo, P.R.V. & Oddone, M.C. & Evencio-Neto, J. & Lessa, R. (2022): Reproductive biology of the whitespotted eagle ray Aetobatus narinari (Myliobatiformes) captured in the coast of Paraiba and Pernambuco, Brazil. Journal of Fish Biology, in press https://dx.doi.org/10.1111/jfb.15026
Barcellos, L.R. & Barreto, R. & Lessa, R.P.T. (2022): Occurrence and population structure of sharks in two ecologically or biologically significant marine areas off north-eastern Brazil. Aquatic Conservation, Marine and Freshwater Ecosystems, in press https://dx.doi.org/10.1002/aqc.3787
Bosi, G. & Merella, P. & Maynard, B.J. & Dezfuli, B.S. (2022): Microscopic Characterization of the Mucous Cells and Their Mucin Secretions in the Alimentary Canal of the Blackmouth Catshark Galeus melastomus (Chondrichthyes: Elasmobranchii). Fishes, 7(1), Article 8 https://dx.doi.org/10.3390/fishes7010008
Bunholi, I.V. & Ferrette, B.L.D. & Domingues, R.R. & Rotundo, M.M. & Cuevas, J.M. & Garcia, M. & Gomez, S. & de Freitas, R.H.A. & Oliveira, C. & Foresti, F. & Mendonca, F.F. (2022): Multilocus phylogeography of the endemic and endangered angular angelshark (Squatina guggenheim) in the Southwest Atlantic Ocean. Hydrobiologia, in press https://dx.doi.org/10.1007/s10750-022-04855-3
Chen, C.F. & Chen, C.W. & Ju, Y.R. & Wang, M.H. & Lim, Y.C. & Tsai, W.P. & Dong, C.D. (2022): Evaluation of polycyclic aromatic hydrocarbons in silky sharks Carcharhinus falciformis collected from Western Indian Ocean and human health risk assessment. Science of the Total Environment, 822, Article 153675 https://dx.doi.org/10.1016/j.scitotenv.2022.153675
Choy, C.P.P. & Wainwright, B.J. (2022): What Is in Your Shark Fin Soup? Probably an Endangered Shark Species and a Bit of Mercury. Animals, 12(7), Article 802 https://dx.doi.org/10.3390/ani12070802
Clements, O.N. & Leurs, G. & Witbaard, R. & Pen, I. & Verkuil, Y.I. & Govers, L.L. (2022): Growth, maturity, and diet of the pearl whipray (Fontitrygon margaritella) from the Bijagos Archipelago, Guinea-Bissau. Peerj, 10, Article e12894 https://dx.doi.org/10.7717/peerj.12894
French, I. & Wainwright, B.J. (2022): DNA Barcoding Identifies Endangered Sharks in Pet Food Sold in Singapore. Frontiers in Marine Science, 9, Article 836941 https://dx.doi.org/10.3389/fmars.2022.836941
Godinez-Padilla, C.J. & Castillo-Geniz, J.L. & de la Torre, B.H. & Gonzalez-Ania, L.V. & Roman-Verdesoto, M.H. (2022): Marine-climate interactions with the blue shark (Prionace glauca) catches in the western coast of Baja California Peninsula, Mexico. Fisheries Oceanography, 31(3), 291–318 https://dx.doi.org/10.1111/fog.12578
Gonzalez-Isais, M. & Montes, H.M. (2022): Variación Morfológica del Neurocráneo de Ocho Especies de Batoideos (Chondrichtyes) [Morphological variation of the neurocranium of eight species of batoids (Chondrichthyes)]. International Journal of Morphology, 40(1), 37–45
Hamilton, B.R. & Peterson, C.T. & Dawdy, A. & Grubbs, R.D. (2022): Environmental correlates of elasmobranch and large fish distribution in a river-dominated estuary. Marine Ecology Progress Series, 688: 83–98 https://dx.doi.org/10.3354/meps14019
Joung, S.J. & Hsu, Z.Y. & Su, K.Y. & Liu, K.M. (2022): Age and Growth of the Spot-Tail Shark, Carcharhinus sorrah, in the Taiwan Strait. Journal of Marine Science and Engineering, 10(3), Article 413 https://dx.doi.org/10.3390/jmse10030413
Kajiura, S.M. & Loyer, J.C. & Ruddy, C. & Porter, M.E. (2022): Swimming kinematics of the Caribbean reef shark, Carcharhinus perezi. Journal of Fish Biology, in press https://dx.doi.org/10.1111/jfb.15035
Kane, L.P. & O'Connor, M.R. & Papich, M.G. (2022): Pharmacokinetics of a Single Dose of Intramuscular and Oral Meloxicam in Yellow Stingrays (Urobatis jamaicensis). Journal of Zoo and Wildlife Medicine, 53(1), 153–158 https://dx.doi.org/10.1638/2021-0123
Katzer, R.J. & Schultz, C. & Pham, K. & Sotelo, M.A. (2022): The Natural History of Stingray Injuries. Prehospital and Disaster Medicine, in press https://dx.doi.org/10.1017/s1049023x22000565
Lara-Lizardi, F. & Hoyos-Padilla, E.M. & Klimley, A.P. & Grau, M. & Ketchum, J.T. (2022): Movement patterns and residency of bull sharks, Carcharhinus leucas, in a marine protected area of the Gulf of California. Environmental Biology of Fishes, in press https://dx.doi.org/10.1007/s10641-022-01223-x
Leyton, M.M. & Nogueira, J.L. & Chiaramonte, G.E. (2022): Captura de Condrictios por la Flota Costera de Puerto Quequén (Buenos Aires) Análisis de la Serie Temporal 1999 2010 con Modelos Mixtos Aditivos Generalizados [Abstract]. XI Jornadas Nacionales de Ciencias del Mar – XIX Coloquio de Oceanografía que se desarrolló este mes en Comodoro Rivadavia, Argentina
Martins, M.F. & Costa, P.G. & Bianchini, A. (2022): Maternal transfer of pharmaceuticals and personal care products in the Brazilian guitarfish Pseudobatos horkelii. Environmental Advances, 8, Article 100228 https://dx.doi.org/10.1016/j.envadv.2022.100228
Nelson, L.N. & Jones, C.M. & McDowell, J.R. (2022): Rangewide Population Structure of the Clearnose Skate. Transactions of the American Fisheries Society, in press https://dx.doi.org/10.1002/tafs.10351
Orlov, A.M. & Rabazanov, N.I. & Nikiforov, A.I. (2022): Ontogenic Changes in Coloration of Rare Deepwater Richardson's Ray Bathyraja richardsoni (Arhynchobatidae, Rajiformes, Chondrichthyes). Russian Journal of Developmental Biology, 53(1), 27–40 https://dx.doi.org/10.1134/s1062360422010052
O'Sullivan, J. & Lowe, C.G. & Sosa-Nishizaki, O. & Jorgensen, S.J. & Anderson, J.M. & Farrugia, T.J. & Garcia-Rodriguez, E. & Lyons, K. & McKinzie, M.K. & Onate-Gonzalez, E.C. & Weng, K. & White, C.F. & Winkler, C. & Van Houtan, K.S. (2022): A biologging database of juvenile white sharks from the northeast Pacific. Scientific Data, 9(1), Article 142 https://dx.doi.org/10.1038/s41597-022-01235-3
Ovegard, M. & Hogvall, J. & Ovegard, Ma. & Wikstrom, A. & Wennhage, H. (2022): Previously undocumented relationship between spiny dogfish Squalus acanthias and juvenile Atlantic horse mackerel Trachurus trachurus revealed by stereo-BRUV. Environmental Biology of Fishes, 105(3), 453–458 https://dx.doi.org/10.1007/s10641-022-01239-3
Pantoja-Echevarria, L.M. & Tamburin, E. & Elorriaga-Verplancken, F.R. & Marmolejo-Rodriguez, A.J. & Galvan-Magana, F. & Tripp-Valdez, A. & Lara, A. & Jonathan, M.P. & Sujitha, S.B. & Delgado-Huertas, A. & Arreola-Mendoza, L. (2022): How to stay together? Habitat use by three sympatric sharks in the western coast of Baja California Sur, Mexico. Environmental Science and Pollution Research, in press https://dx.doi.org/10.1007/s11356-022-19530-2
Pirotta, V. & Hocking, D.P. & Iggleden, J. & Harcourt, R. (2022): Drone Observations of Marine Life and Human-Wildlife Interactions off Sydney, Australia. Drones, 6(3), Article 75 https://dx.doi.org/10.3390/drones6030075
Raoult, V. & Gaston, T.F. & Smith, C. & Dolfo, V. & Park, J.M. & Williamson, J.E. (2022): Patterns of mother-embryo isotope fractionation in batoids vary within and between species. Journal of Fish Biology, in press https://dx.doi.org/10.1111/jfb.15034
Senko, J.F. & Peckham, S.H. & Aguilar-Ramirez, D. & Wang, J.H. (2022): Net illumination reduces fisheries bycatch, maintains catch value, and increases operational efficiency. Current Biology, 32(4), 911–918 https://dx.doi.org/10.1016/j.cub.2021.12.050
Setyawan, E. & Stevenson, B. & Izuan, M. & Constantine, R. & Erdmann, M.V. (2022): How Big Is That Manta Ray? A Novel and Non-Invasive Method for Measuring Reef Manta Rays Using Small Drones. Drones, 6(3), Article 63 https://dx.doi.org/10.3390/drones6030063
Shibuya, A. & Duncan, W.P. (2022): Pre-copulatory bite wounds as evidence of aggressive competition for mating in the neotropical freshwater stingray Potamotrygon motoro. Acta Amazonica, 52(1), 45–48 https://dx.doi.org/10.1590/1809-4392202101762
Sternes, P.C. & Higham, T.E. (2022): Hammer it out: shifts in habitat are associated with changes in fin and body shape in the scalloped hammerhead (Sphyrna lewini). Biological Journal of the Linnean Society, in press, blac035 https://dx.doi.org/10.1093/biolinnean/blac035
Tomita, T. & Toda, M. & Murakumo, K. & Kaneko, A. & Yano, N. & Nakamura, M. & Sato, K. (2022): Five-Month Incubation of Viviparous Deep-Water Shark Embryos in Artificial Uterine Fluid. Frontiers in Marine Science, 9, Article 825354 https://dx.doi.org/10.3389/fmars.2022.825354
Torres, Y. & Charvet, P. & Faria, V.V. & de Castro, A.L.F. (2022): Evidence of multiple paternity for the endemic Xingu River stingray. Journal of Fish Biology, in press https://dx.doi.org/10.1111/jfb.15038
Tsai, W.P. & Huang, C.H. (2022): Data-limited approach to the management and conservation of the pelagic thresher shark in the Northwest Pacific. Conservation Science and Practice, in press https://dx.doi.org/10.1111/csp2.12682
van Boeckel, J. & Everaert, S. (2022): First fossil record of Mustelus aff. punctulatus Risso, 1826: new evidence for a smooth-hound shark population in the Late Miocene North Sea Basin. Geologica Belgica, 25(1-2), in press j
Walsh, C.A.J. & Momigliano, P. & Boussarie, G. & Robbins, W.D. & Bonnin, L. & Fauvelot, C. & Kiszka, J.J. & Mouillot, D. & Vigliola, L. & Manel, S. (2022): Genomic insights into the historical and contemporary demographics of the grey reef shark. Heredity, 128(4), 225–235 https://dx.doi.org/10.1038/s41437-022-00514-4
Willmer, I.Q. & Wosnick, N. & Chávez Rocha, R.C. & Dillenburg Saint'Pierre, T. & Vianna, M. & Hauser-Davis, R.A. (2022): First report on metal and metalloid contamination of Ampullae of Lorenzini in sharks: A case study employing the Brazilian sharpnose shark Rhizoprionodon lalandii from Southeastern Brazil as an ecotoxicological model. Marine Pollution Bulletin, 179, Article 113671  https://dx.doi.org/10.1016/j.marpolbul.2022.113671
Woodyard, M. & Polidoro, B.A. & Matson, C.W. & McManamay, R.A. & Saul, S. & Carpenter, K.E. & Collier, T.K. & Di Giulio, R. & Grubbs, R.D. & Linardich, C. & Moore, J.A. & Romero, I.C. & Schlenk, D. & Strongin, K. (2022): A comprehensive petrochemical vulnerability index for marine fishes in the Gulf of Mexico. Science of the Total Environment, 820, Article 152892  https://dx.doi.org/10.1016/j.scitotenv.2021.152892

Extinct Chondrichthyes:
Costa, B.L.P. (2022): Fishes from the Upper Jurassic of Torres Vedras, Portugal. Master thesis, Faculdade de Ciências e Tecnologia da Universidade NOVA de Lisboa
Goni, I. & Cuny, G. (2022): New record of the genus Ptychodus Agassiz, 1834, (Chondrichthyes, Elasmobranchii) from the Upper Cretaceous of Bornholm (Denmark). Bulletin of the Geological Society of Denmark, 70, 19–25 https://dx.doi.org/10.37570/bgsd-2022-70-02
Perez, V.J.  (2022): The chondrichthyan fossil record of the Florida Platform (Eocene–Pleistocene). Paleobiology, in press https://dx.doi.org/10.1017/pab.2021.47
Takakuwa, Y. & Tanaka, M. & Kamimura, H. (2022): New occurrence of Acrodus (Hybodontiformes; Chondrichthyes) fossil from the Ishido Formation (Lower Cretaceous) of the Sanchu Group, Kanna Town, Gunma, Japan Bulletin of Gunma Museum of Natural History, 26, 55–62
van Boeckel, J. & Everaert, S. (2022): First fossil record of Mustelus aff. punctulatus Risso, 1826: new evidence for a smooth-hound shark population in the Late Miocene North Sea Basin. Geologica Belgica, 25(1-2), in press  

Ben Saad, C. & Suthar, J. & Theisen, S. & Palm, H.W. & Gargouri, L. (2022): Echinocephalus caniculus n. sp. (Nematoda: Gnathostomatidae Railliet, 1895) from the lesser spotted dogfish Scyliorhinus canicula (L.) (Elasmobranchii: Scyliorhinidae Gill, 1862) off Tunisia, with a key to species of the genus Echinocephalus. Systematic Parasitology, in press  https://dx.doi.org/10.1007/s11230-022-10027-7




Sharks lose their natural response with prey if not frequently rewarded

Date: April 20, 2022
Source: Flinders University
Summary: New research studying the behavior of Port Jackson sharks has captured their astute ability to realize when the smell of natural prey doesn't lead to a feeding opportunity. The study by shark ecologists has revealed sharks' response to the smell of food declined if not sufficiently rewarded by the promise of eating, suggesting they can learn to avoid wasting time and energy on inaccessible food sources.

What caused this megatooth shark's massive toothache?

Date: May 12, 2022
Source: North Carolina State University
Summary: Did the world's largest prehistoric shark need an orthodontist, or did it just have a bad lunch?

Using shark teeth to decipher evolutionary processes

Tooth shapes of the tiger shark: Already the embryo changes -- and swallows -- its teeth

Date: May 12, 2022
Source: University of Vienna
Summary: From embryo to turtle cracker: Palaeobiologists studied the multiple changes in tooth shape in the tiger shark. The study is also central in drawing conclusions about extinct species from the myriad of preserved shark teeth in the field of palaeontology.


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