NEWSLETTER 06+07/2021 15.07.2021

NEW PARTNERS OF SHARK-REFERENCES

Maria Cristina Oddone, Instituto de Ciências Biológicas, Universidade Federal de Rio Grande, Brasil sent me this two obituaries written in memory of professor Carolus Maria Vooren.

english:
Obituary: Professor Carolus Maria Vooren (1941-2021).
Pan-American Journal of Aquatic Sciences, 16(1): 1-4.
http://www.panamjas.org/pdf_artigos/PANAMJAS_16(1)_1-4.pdf

portuguese
OBITUÁRIO - CAROLUS MARIA VOOREN (14/11/1941-12/3/2021)
v. 54 n. 1 (2021): Arquivos de Ciências do Mar
http://www.periodicos.ufc.br/.../article/view/71025/196868 

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

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New Images

Missing papers:

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

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

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


Extinct Chondrichthyes:

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

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


Extant Chondrichthyes:

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

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

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.

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.

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:

Welcome to ESEB 2021 Congress.

Given the current situation, the organizers
decided to postpone the congress by a year.

Welcome to the ESEB 2021 congress, to be held at the Prague Congress Centre, the Czech Republic, on 22-27 August 2021.

The congresses of the European Society for Evolutionary Biology (ESEB) are organized biennially since 1987 and are now among the largest conferences in evolutionary biology with about 1400 – 1700 participants.

The congress will commence on Sunday, August 22, 2021, with the welcome reception, and will continue until Friday, August 27, concluding with the conference dinner at Občanská Plovárna Restaurant on this evening.

The Prague Congress Centre is easily accessible from the city centre and has a beautiful panoramic view of Prague.  

92nd Annual Meeting of the Paläontologische Gesellschaft!

This year's Annual Meeting will be held as online conference from September 27 to 30, 2021.

We are pleased to host the 92nd annual conference of the Paläontologische Gesellschaft (PalGes). The meeting, like the previous ones, is designed as an international meeting to present cutting-edge research from palaeobiology, palaeontology, geobiology and related subjects. The Paläontologische Gesellschaft is one of the oldest and largest palaeontological societies in the world and we "Viennese" are now hosting the annual meeting for the fifth time after 1923, 1954, 1963 and 2011.

The venue will be held as online conference only due to uncertainties over travel and meeting size restrictions related to COVID-19 development. Participation in the conference is free of charge. Unfortunately, the online format means that there will not be any poster session or conference dinner this year.

We will keep you up to date with new and exciting details of our virtual meeting. If you have questions, please do not hesitate to contact us via e-mail.

EBERT, D.A. & LESLIE, R.W. & WEIGMANN, S. (2021): Etmopterus brosei sp. nov.: a new lanternshark (Squaliformes: Etmopteridae) from the southeastern Atlantic and southwestern Indian oceans, with a revised key to the Etmopterus lucifer clade. Marine Biodiversity, 51: 53
New species: Etmopterus brosei
Abstract: A new species of lanternshark, Etmopterus brosei sp. nov. (Squaliformes: Etmopteridae), is described from the southeastern Atlantic and southwestern Indian oceans. The new species resembles other members of the Etmopterus lucifer Jordan & Snyder, 1902 clade in having linear rows of dermal denticles, and most closely resembles the conspecific E. sculptus Ebert, Compagno, & De Vries, 2011 from the southeastern Atlantic and southwestern Indian oceans. The new species is fairly common along the upper continental slopes off South Africa, Mozambique, and seamounts along the Madagascar Ridge, including Walters Shoal, in 480–1200 m depth. It can be distinguished from other members of the E. lucifer clade by a combination of characteristics, including the arrangement of flank and caudal markings, shape and size of flank marking, the arrangement of dermal denticles along the body, and the presence of dermal denticles on the dorsal fin bases. A revised key to the Etmopterus lucifer clade is provided.
 
WHITE, W.T. & FRICKE, R. (2021): Raja mauritaniensis: a replacement name for Raja africana Capapé, 1977 (Rajiformes: Rajidae), a junior homonym of Raja africana Bloch & Schneider, 1801 (Myliobatiformes: Dasyatidae). Zootaxa, 4970 (2): 399–400
New name: Raja mauritaniensis
Abstract: Raja africana Capapé, 1977 is a primary junior synonym of Raja africana Bloch & Schneider, 1801 and therefore permanently invalid (International Code of Zoological Nomenclature, article 57.2) and must be replaced. Raja africana Bloch & Schneider, 1801 was first described by Bloch & Schneider (1801: 367), based on a specimen from Guinea, West Africa (eastern Atlantic Ocean). The unique holotype is extant in the Zoologisches Museum of the Humboldt University, Berlin (ZMB 7837, a partial dry skin). The species was treated as valid as Urogymnus africanus (Bloch & Schneider 1801) by Compagno & Roberts (1984: 285), but later synonymized with Urogymnus asperrimus (Bloch & Schneider 1801) in the subfamily Urogymninae of the family Dasyatidae (Myliobatiformes) by Compagno (1986: 141), Capapé & Desoutter (1990: 63) and Séret (2016: 1418). It is widespread in the eastern Atlantic, Red Sea and Indo–West Pacific.

 
LOBODA, T.S. & LASSO, C.A. & ROSA, R.S & DE CARVALHO, M.R. (2021): Two new species of freshwater stingrays of the genus Paratrygon (Chondrichthyes: Potamotrygonidae) from the Orinoco basin, with comments on the taxonomy of Paratrygon aiereba. Neotropical Ichthyology, 19 (2): e200083
New species: Paratrygon orinocensis, Paratrygon parvaspina
Abstract: The genus Paratrygon, currently recognized as the sole monotypic genus of the family Potamotrygonidae, has a considerably greater diversity than previously indicated, including molecular studies, which supported P. aiereba (hitherto the only recognized species in the genus) as a possible species complex. Here we describe two new species of the genus that are both endemic to and sympatric in the Orinoco basin. Paratrygon aiereba, type species of the genus, is now restricted to the Amazon basin. Both new species are identified and defined through morphological characters such as coloration, dermal denticle morphology, arrangement of thorns, distribution and morphology of ventral lateral line canals, morphology of skeletal elements, and morphometrics. An extensive comparison of these characters between the new species herein described and P. aiereba is presented. Finally, a taxonomic reappraisal of P. aiereba is provided through a revision of preserved material and its original description, plus new evidence about its type-locatity, collectors, and a reconsideration of the destination of its type-specimen.
 

WEIGMANN, S. & EBERT, D.A. & SÉRET, B. (2021): Resolution of the Acroteriobatus leucospilus species complex, with a redescription of A. leucospilus (Norman, 1926) and descriptions of two new western Indian Ocean species of Acroteriobatus (Rhinopristiformes, Rhinobatidae). Marine Biodiversity, 51: 58
New species: Acroteriobatus andysabini, Acroteriobatus stehmanni
Abstract: Recent sampling efforts and examinations of museum material provided evidence for a complex of species within Acroteriobatus leucospilus (Norman, 1926). The present manuscript contains a redescription of A. leucospilus involving the syntypes and additional material, as well as formal descriptions of two new species of Acroteriobatus Giltay, 1928. All specimens of both new species were found in the western Indian Ocean. Individuals of the first new species, hereafter referred to as Acroteriobatus andysabini sp. nov., were identified originating from Madagascar, and specimens of the second new species, hereafter referred to as Acroteriobatus stehmanni sp. nov., were only found off Socotra Islands at the junction between the Gulf of Aden and the Arabian Sea. Both new species appear to be endemic to the respective region and allopatric to A. leucospilus and occur in coastal waters to at least 80 m and 43 m depth, respectively. They differ from A. leucospilus in a number of characteristics including the maximum size and coloration in fresh. Acroteriobatus andysabini sp. nov. is a large species growing to more than 100 cm total length (TL) and with elongated bluish-gray spots on snout giving “stripe-nosed” appearance; numerous small bluish-gray spots on pectoral, pelvic, dorsal, and caudal fins; brown spots on trunk and fin bases; lateral tail folds striped orange and white; and ventral surface largely white but with a V-shape pattern of faint to dark speckled black spots on snout tip. Acroteriobatus stehmanni sp. nov. is a small species growing to ~62 cm TL and with sparse patterning with small bluish-gray circular spots confined to snout tip, posterior pectoral-fin margins, a pair on midbody, and few on posterior pelvic-fin margins, rather indistinct small to larger dark brown spots, and lateral tail folds and ventral surface white. Acroteriobatus leucospilus is a medium-sized species growing to ~96 cm TL and with patterning similar to A. andysabini sp. nov. but ventral surface uniformly white and lateral tail folds white or striped blue and brown. Taxonomical differences include nasal lamellae counts (42–48 in A. andysabini sp. nov. vs. 43–48 in A. stehmanni sp. nov. vs. 37–41 in A. leucospilus), snout angle (76–85° vs. 71–77° vs. 68–81°), and dorsal head length (24.2–33.5% vs. 17.2–22.8% TL vs. 24.0–29.2% TL). A key to the species of Acroteriobatus is given for the first time.

 
HABIB, K.A. & ISLAM, M.J. (2021): Description of a new species of giant guitarfish, Glaucostegus younholeei sp. nov. (Rhinopristiformes: Glaucostegidae) from the northern Bay of Bengal, Bangladesh. Zootaxa, 4995 (1): 129–146
New species: Glaucostegus younholeei
Abstract: A new species of giant guitarfish, Glaucostegus younholeei sp. nov., is described from 13 specimens, 730–933 mm total length, collected from fish landing center of Bangladesh Fisheries Development Corporation in Cox’s Bazar district of Bangladesh. The new species is distinguished from congeners in having the following combination of characters: Body brownish or greyish in color with a narrowly wedge-shaped disc, and long narrow bluntly pointed snout (angle 31–40°), and broad oblique nostrils with the narrow anterior opening. Nostrils about half of the mouth width, subequal (0.98–1.33) to internasal width; ~55–57 nasal lamellae; anterior nasal flaps slightly penetrating into internasal space, their interspace 2.20– 2.61 in length of the posterior nasal aperture. Orbit very small in adults, diameter 8.19–11.62 in preorbital length, 2.25–2.69 in interorbital space. Rostral ridges almost joined along their entire length; margin of cranium sharply demarcated before eyes. Spiracular folds very short and widely separated. Skin rough, densely covered with small denticles, more coarsely granular on the dorsal surface than ventrally, enlarged between orbits and in a distinct band between nape and first dorsal fin. Tail relatively longer, length 1.15–1.48 in disc length; dorsal fins narrowly spaced, interspace 1.32–2.11 in base length of the first dorsal fin. Clasper length in adult male 4.37–5.70 in total length. Phylogenetic analysis of DNA barcode sequences also shows the clear divergence of Glaucostegus younholeei from other congeneric species obtained from GenBank. A key is provided to the 8 known members including new species of the genus Glaucostegus.




Extinct Chondrichthyes:

STUMPF, S. & ETCHES, S. & UNDERWOOD, C.J. & KRIWET, J. (2021): Durnonovariaodus maiseyi gen. et sp. nov., a new hybodontiform shark-like chondrichthyan from the Upper Jurassic Kimmeridge Clay Formation of England. Peerj, 9: e11362
New genus: Durnonovariaodus
New species: Durnonovariaodus maiseyi
Abstract: A partial skeleton of a hybodontiform shark-like chondrichthyan from the Upper Jurassic Kimmeridge Clay Formation of Dorset, England, is described and designated as a new genus and species, Durnonovariaodus maiseyi gen. et sp. nov. The holotype and only known specimen, which is represented by disarticulated splanchnocranial elements with associated teeth, a single dorsal fin spine, the pelvic girdle, as well as unidentifiable cartilage fragments, plus countless dermal denticles, exhibits a puzzling combination of dental and skeletal features, providing important new insights into the morphological and ecological diversity of hybodontiforms. Durnonovariaodus gen. nov. displays a unique set of dental characters, showing close morphological resemblance to Secarodus from the Middle Jurassic of England, which was erected for distinctive, strongly labio-lingually compressed multicuspid cutting teeth originally described as Hybodus polyprion. Skeletally, Durnonovariaodus gen. nov. resembles Hybodus and Egertonodus in having a palatoquadrate with a palatobasal process and an ethmoidal articular surface, combined with the possession of dorsal fin spines ornamented with costae. Therefore, and given the absence of any conclusive phylogenetic framework, Durnonovariaodus maiseyi gen. et sp. nov. is here tentatively referred to Hybodontidae until more complete material becomes available in order to enable a more reliable suprageneric identification. The holotype of Durnonovariaodus maiseyi gen. et sp. nov. contains two separate pelvic half-girdles, a feature previously considered as evolutionarily primitive among hybodontiforms. However, unfused pelvic half-girdles also occur in the supposedly closely related species Hybodus hauffianus and may in fact have been more widely distributed among hybodontiforms than previously thought, thus rendering the phylogenetic utility of separated pelvic half-girdles for inferring hybodontiform interrelationships difficult and unresolved.

 
FEICHTINGER, I. & IVANOV, A.O. & WINKLER, V. & DOJEN, C. & KINDLIMANN, R. & KRIWET, J. & PFAFF, C. & SCHRAUT, G. & STUMPF, S. (2021): Scarce ctenacanthiform sharks from the Mississippian of Austria with an analysis of Carboniferous elasmobranch diversity in response to climatic and environmental changes. Journal of Vertebrate Paleontology, in press
New species: Cladodus gailensis
Abstract: The Carboniferous is characterized by drastic climatic and environmental fluctuations, which include multiple phases of glaciation resulting in an icehouse climate. Additionally, dynamic continental reconfigurations forced the contraction of the Rheic Ocean resulting in the closure of the Rheic–Tethyan Gateway, which precluded further faunal exchanges between the North American and Eurasian marine realms. Interestingly, cartilaginous fishes seem to be relatively immune to these drastic climatic and environmental changes. The Eurasian fossil record of Paleozoic sharks is strongly biased towards intensively sampled localities from England, Ireland, Scotland, and the Russian Platform. Here we present rare dental material from the Serpukhovian (early Carboniferous) of Austria, adding new information to the paleogeographic distribution of ctenacanthiform sharks. The new material revealed the first record of the genus Saivodus in Central Europe and allowed us to recognize a new species, Cladodus gailensis sp. nov., and a remnant of fossilized cartilage. In an attempt to identify possible linkages between climatic or environmental fluctuations on shark diversity throughout the Carboniferous, we provide a synopsis of the distribution and diversity of elasmobranchs based on primary literature. This preliminary assessment at genus level indicates two pronounced events of extinction, with the first one occurring during the latest Mississippian and the second one towards the end of the Pennsylvanian. The first extinction event distinctly correlates with the known diversity decline of other marine inhabitants and the second occurred during an unstable period of multiple phases of glaciation.

 
LUCCISANO, V. & PRADEL, A. & AMIOT, R. & GAND, G. & STEYER, J.-S. & CUNY, G. (2021): A new Triodus shark species (Xenacanthidae, Xenacanthiformes) from the lowermost Permian of France and its paleobiogeographic implications. Journal of Vertebrate Paleontology, in press
New species: Triodus aeduorum
Abstract: The Xenacanthiformes from Central and Eastern European deposits have been extensively studied, but the systematics of the species from the French Carboniferous–Permian Autun Basin (Saône-et-Loire) remains debated. Numerous xenacanthiform remains are still identified under the doubtful genus ‘Expleuracanthus’, and many of them consist of isolated dorsal spines which are difficult to identify. Numerous well-preserved specimens are still undescribed and the diversity of the xenacanthiform fauna from the Autun Basin is poorly understood. For example, specimens of the genus Triodus from the Muse oil-shale bed (OSB) of the Autun Basin have no specific attribution, whereas this genus is widely distributed across European Carboniferous–Permian basins. In this study, we describe new specimens of Triodus from the lowermost Permian of the Muse OSB. They allow the erection of a new species, Triodus aeduorum sp. nov., and discussion of the validity of several species from the same locality: ‘Expleuracanthus’ frossardi is considered as a nomen dubium and other Triodus specimens need for the time being to be left in open nomenclature as Triodus sp. These results highlight the endemism of the Triodus species in each European Carboniferous–Permian basin and raise the question of how they migrated from one to another.


Parasites:

no taxonomic news this month

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

Latest Research Articles

ADNET, S. & FEICHTINGER, I. & HARZHAUSER, M. & POLLERSPÖCK, J. (2021) A mesopelagic selachian fauna from the middle Eocene of St. Pankraz (Austria) reveals homogeneity in deep-marine environments during the warm period in Europe. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 301 (1): 25-63  https://dx.doi.org/10.1127/njgpa/2021/0996
AGNOLIN, F.L. & BOGAN, S. & CASADIO, S. (2021) First marine ichthyofauna from the late Eocene of Santa Cruz province, patagonia, Argentina. Journal of South American Earth Sciences, 107: 103064 https://dx.doi.org/10.1016/j.jsames.2020.103064
BENNETT, C.E. & KEARSEY, T.I. & DAVIES, S.J. & LENG, M.J. & MILLWARD, D. & SMITHSON, T.R. & BRAND, P.J. & BROWNE, M.A.E. & CARPENTER, D.K. & MARSHALL, J.E.A. & DULSON, H. & CURRY, L. (2021) Palaeoecology and palaeoenvironment of Mississippian coastal lakes and marshes during the early terrestrialisation of tetrapods. Palaeogeography Palaeoclimatology Palaeoecology, 564: 110194 https://dx.doi.org/10.1016/j.palaeo.2020.110194
CEBALLOS-IZQUIERDO, Y. & VINOLA-LOPEZ, L.W. & BORGES-SELLEN, C.R. & ARANO-RUIZ, A.F. (2021) Late Cretaceous sharks from Cuba, first record of Serratolamna serrata (Agassiz) (Lamniformes, Serratolamnidae). Geobios, 65: 1-6 https://dx.doi.org/10.1016/j.geobios.2021.01.002    
COLLARETA, A. & LANDINI, W. & BIANUCCI, G. & DI CELMA, C. (2021) Until Panama do us part: new finds from the Pliocene of Ecuador provide insights into the origin and palaeobiogeographic history of the extant requiem sharks Carcharhinus acronotus and Nasolamia velox. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 300 (1): 103-115  https://dx.doi.org/10.1127/njgpa/2021/0981    
COLLARETA, A. & MARX, F.G. & CASATI, S. & DI CENCIO, A. & MERELLA, M. & BIANUCCI, G. (2021) A cetotheriid whale from the upper Miocene of the Mediterranean. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 301 (1):  9-16  https://dx.doi.org/10.1127/njgpa/2021/0994    
COLLARETA, A. & MERELLA, M. & CASATI, S. & DI CENCIO, A. (2021) First fossils of the extant blacktip shark Carcharhinus limbatus from Europe and the Mediterranean Basin. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 301 (1):  109-118  https://dx.doi.org/10.1127/njgpa/2021/1002    
DANKINA, D. & SPIRIDONOV, A. & RACZYŃSKI, P. & RADZEVIČIUS, S. (2021) Late Permian ichthyofauna from the North-Sudetic Basin, SW Poland. Acta Palaeontologica Polonica, 66: in press  https://dx.doi.org/10.4202/app.00839.2020    
DILLON, E.M. & MCCAULEY,  D.J. & MORALES-SALDAÑA, J.M. & LEONARD,  N.D. & ZHAO, J.-X. & O’DEA, A. (2021) Fossil dermal denticles reveal the preexploitation baseline of a Caribbean coral reef shark community. Proceedings of the National Academy of Sciences of the United States of America, 118 (29): e2017735118 https://dx.doi.org/10.1073/pnas.2017735118
FEICHTINGER, I. & IVANOV, A.O. & WINKLER, V. & DOJEN, C. & KINDLIMANN, R. & KRIWET, J. & PFAFF, C. & SCHRAUT, G. & STUMPF, S. (2021) Scarce ctenacanthiform sharks from the Mississippian of Austria with an analysis of Carboniferous elasmobranch diversity in response to climatic and environmental changes. Journal of Vertebrate Paleontology, in press https://dx.doi.org/10.1080/02724634.2021.1925902
FILEK, T. & HOFMAYER, F. & FEICHTINGER, I. & BERNING, B. & POLLERSPÖCK, J. & ZWICKER, J. & SMRZKA, D. & PECKMANN, J. & KRANNER, M. & MANDIC, O. & REICHENBACHER, B. & KROH, A. & UCHMAN, A. & ROETZEL, R. & HARZHAUSER, M. (2021) Environmental conditions during the late Oligocene transgression in the North Alpine Foreland Basin (Eferding Formation, Egerian) – a multidisciplinary approach. Palaeogeography, Palaeoclimatology, Palaeoecology, in press https://dx.doi.org/10.1016/j.palaeo.2021.110527    
KLUG, C. & SCHWEIGERT, G. & HOFFMANN, R. & WEIS, R. & DE BAETS, K. (2021) Fossilized leftover falls as sources of palaeoecological data: a ‘pabulite’ comprising a crustacean, a belemnite and a vertebrate from the Early Jurassic Posidonia Shale. Swiss Journal of Palaeontology, 140: 10 https://dx.doi.org/10.1186/s13358-021-00225-z    
KOVALCHUK, O. & BARKASZI, Z. (2021) Oligocene basking sharks (Lamniformes, Cetorhinidae) of the Carpathian Basin with a reconsideration of the role of gill rakers in species diagnostics. Journal of Vertebrate Paleontology, in press https://dx.doi.org/10.1080/02724634.2021.1929269    
LUCCISANO, V. & PRADEL, A. & AMIOT, R. & GAND, G. & STEYER, J.-S. & CUNY, G. (2021) A new Triodus shark species (Xenacanthidae, Xenacanthiformes) from the lowermost Permian of France and its paleobiogeographic implications. Journal of Vertebrate Paleontology, in press https://dx.doi.org/10.1080/02724634.2021.1926470    
RANA, R.S. & PATEL, R. & CICIMURRI, D.J. & EBERSOLE, J.A. (2021) Additions to the elasmobranch assemblage from the Bandah Formation (middle Eocene, Bartonian), Jaisalmer District, Rajasthan, India, and the palaeobiogeographic implications of the fauna. Palaeovertebrata 44 (2): e1 https://dx.doi.org/10.18563/pv.44.2.e1    
SCHLESIGER, E. & KOGAN, I. & FISCHER, J. (2021) Isolated Elasmobranch Vertebrae from the Cretaceous of Saxony: Taxonomic and Palaeobiological Evaluation. Abstract. In: XVIII Conference of the European Association of Vertebrate Palaeontologists Online, 5 9 July 2021: 147      
SIBERT, E.C. & RUBIN, L.D. (2021) An early Miocene extinction in pelagic sharks Science, 372 (6546): 1105-1107 https://dx.doi.org/10.1126/science.aaz3549    
STUMPF, S. & ETCHES, S. & UNDERWOOD, C.J. & KRIWET, J. (2021) Durnonovariaodus maiseyi gen. et sp. nov., a new hybodontiform shark-like chondrichthyan from the Upper Jurassic Kimmeridge Clay Formation of England. Peerj, 9: e11362 https://dx.doi.org/10.7717/peerj.11362    
TAKAKUWA, Y. & KIMURA, T. & HASEGAWA, Y. (2021) Fossil sharks from the lower Pleistocene Komiya Formation, Kazusa Group, Tokyo, Japan: The teeth associated with the skeleton of Eschrichtius akishimaensis. Bulletin of Gunma Museum of Natural History, 25: 49-58
YUN, C.-G, (2021) First Deep-Sea Shark Fossil Teeth from the Miocene of South Korea. Zoodiversity, 55 (3): 225–232  https://dx.doi.org/10.15407/zoo2021.03.225    
     

MISCELLANEOUS:

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Unexpected presence of great white sharks in Gulf of California

Date: April 21, 2021

Source: University of Delaware

Summary: A new study suggests the white shark population for the eastern north Pacific, especially those listed in the Gulf of California, might be underestimated. Researchers found that the mortality rates for these white sharks might be underestimated as well, as an illicit fishery for the species was uncovered in the Gulf of California, suggesting that fishers were killing many more white sharks than has been previously understood.

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Largest-ever study of artificial insemination in sharks -- and the occasional 'virgin birth'

Date: May 13, 2021

Source: Field Museum

Summary: Scientists help protect sharks by developing aquarium breeding programs that pair up individuals in ways that increase genetic diversity. In a new study, scientists undertook the largest-ever effort to artificially inseminate sharks. Their work resulted in 97 new baby sharks, including ones whose parents live on opposite sides of the country and a few that don't have fathers at all.

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White shark population is small but healthy off the coast of Central California

Date: May 19, 2021

Source: Oregon State University

Summary: The population of white sharks that call the Central California coast their primary home is holding steady at about 300 animals and shows some signs of growth, a new long-term study of the species has shown.

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3,000-year-old shark attack victim

Date: June 23, 2021

Source: University of Oxford

Summary: Researchers reveal their discovery of a 3,000-year-old victim - attacked by a shark in the Seto Inland Sea of the Japanese archipelago.

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Fossil shark scales provide a glimpse of reef predator populations before human impact

Date: July 5, 2021

Source: University of California - Santa Barbara

Summary: Scientists recently made news by using fossil shark scales to reconstruct shark communities from millions of years ago.

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Why are some fish warm-blooded? Predatory sharks gain speed advantage, study finds

Date: July 1, 2021

Source: Trinity College Dublin

Summary: New research from marine biologists offers answers to a fundamental puzzle that had until now remained unsolved: why are some fish warm-blooded when most are not? It turns out that while (warm-blooded) fish able to regulate their own body temperatures can swim faster, they do not live in waters spanning a broader range of temperatures.

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