NEWSLETTER 01/2021 10.01.2021

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

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

After a turbulent 2020, we would like to thank all our supporters, subscribers and anyone just finding Shark References informative and helpful. We wish all of you a healthy and sharky 2021!

NEWS/ OWN RESEARCH

new papers from team shark-references:

An identification key to elasmobranch genera based on dental morphological characters Part A: Squalomorph sharks (Superorder Squalomorphii). Bulletin of Fish Biology, 18: 77-105

Abstract: Apart from wet-collection specimens, shark and ray (Neoselachii) museum collection specimens are often represented as articulated jaws or single teeth. In many cases, detailed information on locality, species identification and data on the specimen's body are lacking. The identification key for jaws and teeth presented herein is part B of a planned series of dental identification keys. Herein, lamniform sharks are in focus. Today, the order Lamniformes comprises 15 species in 10 genera and 7 families. All of these large active pelagic sharks have a worldwide geographic distribution. The key is essentially based on the following characters: dental formula, presence/absence of specific categories of teeth ((para-)symphyseal, intermediate teeth), form of crown, number of cusplets, and dentition type. The key allows the identification to genus and species level, if adequate specimens are available. It is further supplemented by a detailed species account. The glossary presented in part A of this series extended by some terms that are specific for lamiform sharks.

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New research about teeth and rostral denticles of extant and extinct sawsharks, co-authord by JP from team shark-references

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

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

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New Images

Many thanks to the following people for providing images:

Frederik Mollen (Elasmobranch Research Belgium) for the images of Carcharhinus humani WHITE & WEIGMANN, 2014

Thomas Reinecke, Bochum for images of
Pristiophorus borealis REINECKE, POLLERSPÖCK, MOTOMURA, BRACHER, DUFRAING, GÜTHNER & VON DER HOCHT, 2020
Pristiophorus austriacus REINECKE, POLLERSPÖCK, MOTOMURA, BRACHER, DUFRAING, GÜTHNER & VON DER HOCHT, 2020
Pristiophorus ungeri REINECKE, POLLERSPÖCK, MOTOMURA, BRACHER, DUFRAING, GÜTHNER & VON DER HOCHT, 2020
Pristiophorus tortonicus REINECKE, POLLERSPÖCK, MOTOMURA, BRACHER, DUFRAING, GÜTHNER & VON DER HOCHT, 2020
Pristiophorus rupeliensis STEURBAUT & HERMAN, 1978
Pristiophorus suevicus JAEKEL, 1890

Iris Feichtinger, Wien for images of Nanocetorhinus zeitlingeri FEICHTINGER, POLLERSPÖCK & HARZHAUSER, 2020

Jean-Francois LHOMME for images of Abdounia minutissima (WINKLER, 1874), and Brachycarcharias lerichei (CASIER, 1946)

Вячеслав Смелков for some images of Paraorthacodus eocaenus (LERICHE, 1902) and Paraorthacodus recurvus (TRAUTSCHOLD, 1877)

National Institute of Water and Atmospheric Research (NIWA) for a image of Hydrolagus trolli DIDIER & SÉRET, 2002

Dr. Hiroyuki Motomura for a image of Pristiophorus japonicus GÜNTHER, 1870

Missing papers:

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

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

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

Extinct Chondrichthyes:

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

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

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

Extant Chondrichthyes:

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

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

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

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

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

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

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

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

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

Upcoming Meetings:

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

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

Looking forward to seeing you in Leiden!

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Puebla, México, 19 - 23/04/2021

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

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

TAXONOMIC NEWS/ NEW SPECIES

Extant Chondrichthyes:

no news this month :-)

Extinct Chondrichthyes:

REINECKE, T. & POLLERSPÖCK, J. & MOTOMURA, H. & BRACHER, H. & DUFRAING, L. & GÜTHNER, T. & VON DER HOCHT, F. (2020): Sawsharks (Pristiophoriformes, Pristiophoridae) in the Oligocene and Neogene of Europe and their relationships with extant species based on teeth and rostral denticles. Palaeontos, 33: 57‒163
New species: Pristiophorus borealis, Pristiophorus austriacus, Pristiophorus ungeri, Pristiophorus tortonicus
Abstract: In the fossil record, sawsharks (family Pristiophoridae BLEEKER, 1859) include the genera Pristiophorus MÜLLER & HENLE, 1837, Pliotrema REGAN, 1906 and Ikamauius KEYES, 1979, which are mainly or exclusively represented by isolated lateral denticles of their saw-like rostra or less commonly (Pristiophorus) also by tiny oral teeth. We studied a large collection of fossil pristiophorid rostral denticles and oral teeth obtained from numerous localities exposing marine deposits of Rupelian to Tortonian age (Lower Oligocene to Upper Miocene) in the North Alpine Foreland Basin, North Sea Basin, Northeastern Atlantic and Central/northern Mediterranean Sea. In order to interprete the perceptible differences in tooth and denticle morphology of the fossil material, we conducted a parallel study on oral dentitions and rostral denticles in extant taxa of the Pristiophoridae. Representative samples of upper/lower oral teeth and of lateral/ventral rostral denticles are illustrated to document the heterodonty of teeth and characteristic features of denticles. In all species a gradient monognathic heterodonty is conspicuous. A dignathic heterodonty, typical of Pristiophorus spp., is mainly constituted by teeth in anteriormost files of the lower jaw that are larger and more strongly cambered labially than corresponding teeth in the upper dentition. Four new species are described: Pristiophorus borealis sp nov. from the Sülstorf Formation, early to middle Chattian, Mecklenburg, northeastern Germany; Pristiophorus austriacus sp nov. from the Ebelsberg Formation, Upper Egerian regional stage (Aquitanian), Upper Austria; Pristiophorus ungeri sp nov. from the Neuhofen Formation, lower Ottnangian regional stage (middle Burdigalian), Lower Bavaria, southern Germany and Pristiophorus tortonicus sp nov. from the Upper Mica Clay, early Tortonian, Schleswig-Holstein, northern Germany. For Pristiophorus suevicus JAEKEL, 1890, previously based on a lateral rostral denticle from the conglomeratic Baltringen Horizon, Baltringen Formation (middle Ottnangian, Burdigalian of southwestern Germany), we present a detailed description of oral teeth recovered from lower Ottnangian deposits of the North Alpine Foreland Basin. Palaeoenvironmental data of Paleogene and Neogene lithostratigraphic units (in a European geographical context) that commonly yield pristiophorid teeth/denticles suggest a preference of extinct sawsharks for middle to outer neritic and upper bathyal settings with soft (clayey, silty) bottoms, in agreement with the large depth range of most extant species on the middle to deep shelf and upper slope and the existence of a clear deep-water species (Pristiophorus schroederi) in the family.

Parasites:
IRIGOITIA, M.M. & TAGLIORETTI, V. & TIMI, J.T. (2020): Dendrapta nasicola n. sp. (Copepoda: Siphonostomatoida: Lernaeopodidae) a parasite from the olfactory sacs of Bathyraja scaphiops (Norman, 1937) in the South Western Atlantic. Anais Da Academia Brasileira De Ciencias, 92: e20180933
New species: Dendrapta nasicola
Abstract: During a parasitological survey of the olfactory sacs of 21 species of Rajiformes (Chondrichthyes) from the Southwestern Atlantic Ocean, copepods referable to Dendrapta Kabata (1964) (Siphonostomatoida: Lernaeopodidae) were found parasitizing the cuphead skate Bathyraja scaphiops (Rajiformes: Arhynchobatidae). Morphological analyses using both light and electron microscopy revealed that they belong to a new species. It can be easily distinguished from its congeners by the ratio between lengths of posterior process and trunk (1:0.8), the large to width ratio of trunk (1:0.7) and the armature of the antennule (1, 1, 5 + 1 aesthete). Dendrapta cameroni longiclavata is raised to full specific status, as Dendrapta longiclavata n. comb. Kabata & Gusev, 1966.

MORAVEC, F. & JUSTINE, J.L. (2020): Erection of Euterranova n. gen. and Neoterranova n. gen. (Nematoda, Anisakidae), with the description of E. dentiduplicata n. sp. and new records of two other anisakid nematodes from sharks off New Caledonia. Parasite, 27: 58
New genus: Euterranova, Neoterranova
New species: Euterranova dentiduplicata
Abstract: Helminthological examinations of three species of sharks, Galeocerdo cuvier, Triaenodon obesus (both Carcharhinidae, Carcharhiniformes) and Stegostoma fasciatum (Stegostomatidae, Orectolobiformes) from New Caledonian waters, carried out during 2003–2005, revealed the presence of three species of adult anisakid nematodes referable to Terranova Leiper et Atkinson, 1914. However, this genus can no longer be considered valid, because its type species has been designated a species inquirenda. Therefore, the present nematodes are assigned to two newly established genera, Euterranova n. gen. [type species E. dentiduplicata n. sp.] and Neoterranova n. gen. [type species N. scoliodontis (Baylis, 1931) n. comb.], based mainly on different labial structures. Euterranova dentiduplicata n. sp. from the stomach of S. fasciatum is mainly characterized by the presence of lips with two rows of denticles. Innominate specimens of Euterranova (a female and a third-stage larva) were collected from the digestive tract of T. obesus. Specimens of N. scoliodontis were recorded from G. cuvier. The two named species are described based on light and scanning electron microscopical examinations. Neoterranova scoliodontis has previously been recorded in New Caledonian waters from the same host species. Species previously attributed to Terranova are transferred to Euterranova (5 species), Neoterranova (4 species) or considered species inquirendae (10 species). Since Pseudoterranova Mozgovoy, 1950 was found to be a nomen nudum according to the International Code of Zoological Nomenclature (ICZN), the available name of this genus is Pseudoterranova Mozgovoy, 1953. A key to Porrocaecum-like nematode genera (Porrocaecum, Pseudoterranova, Pulchrascaris, Euterranova, and Neoterranova) is provided.

KRITSKY, D.C. & CHISHOLM, L.A. (2020): Monocotylids (Monogenoidea) infecting elasmobranchs in Moreton Bay, Queensland, Australia, with descriptions of Calicotyle cutmorei n. sp. (Calicotylinae) and Dendromonocotyle raiae n. sp. (Monocotylinae). Systematic Parasitology, 97 (6): 569-589
New species: Calicotyle cutmorei, Dendromonocotyle raiae
Abstract: Eighteen monocotylid species were collected from elasmobranchs during surveys of the parasites of fishes of Moreton Bay, Queensland, Australia. Two new species, Calicotyle cutmorei n. sp. (Calicotylinae) from Carcharhinus sorrah (Valenciennes) (Carcharhiniformes) and Dendromonocotyle raiae n. sp. (Monocotylinae) from Hemitrygon fluviorum (Ogilby) and Neotrygon trigonoides (Castelnau) (both Myliobatiformes) are described and illustrated. Six new faunal records for Moreton Bay are reported: Thaumatocotyle australensis Beverley-Burton & Williams, 1989 (Merizocotylinae) from Maculabatis toshi (Whitley) (Myliobatiformes); Monocotyle corali Chisholm, 1998 (Monocotylinae) from Pastinachus ater (Macleay) (Myliobatiformes); Neoheterocotyle rhynchobatis (Tripathi, 1959) Chisholm, 1994 (Heterocotylinae) from Glaucostegus typus (Anonymous [Bennett]) and Aptychotrema rostrata (Shaw) (both Rhinopristiformes); and Decacotyle elpora Marie & Justine, 2005 (Decacotylinae), Dendromonocotyle torosa Chisholm & Whittington, 2004 (Monocotylinae), and Clemacotyle australis Young, 1967 (Monocotylinae) from Aetobatus ocellatus (Kuhl) (Myliobatiformes). Maculabatis toshi is a new host record for T. australensis, and A. rostrata is a new host record for N. rhynchobatis. Ten species previously recorded from Moreton Bay were collected: Monocotyle caseyae Chisholm & Whittington, 2005 (Monocotylinae) and Heterocotyle whittingtoni Chisholm & Kritsky, 2020 (Heterocotylinae) from M. toshi; Monocotyle sp. A of Chisholm (1998a) (Monocotylinae) from H. fluviorum; Dendromonocotyle kuhlii Young, 1967 and Monocotyle kuhlii Young, 1967 (both Monocotylinae) from N. trigonoides; Thaumatocotyle cf. pseudodasybatis Hargis, 1955 (Merizocotylinae), Empruthotrema kearni Whittington, 1990 (Merizocotylinae) and Decacotyle octona Young, 1967 (Decacotylinae) from A. ocellatus; and Mycteronastes icopae (Beverley-Burton & Williams, 1989) Kearn & Beverley-Burton, 1990 (Merizocotylinae) and Troglocephalus rhinobatidis Young, 1967 (Dasybatotreminae) from G. typus.

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

Latest Research Articles

Extant Chondrichthyes:
ADAMS, K.R. & GIBBS, L. & KNOTT, N.A. & BROAD, A. & HING, M. & TAYLOR, M.D. & DAVIS, A.R. (2020) Coexisting with sharks: a novel, socially acceptable and non-lethal shark mitigation approach. Scientific Reports, 10 (1): 17497 http://dx.doi.org/10.1038/s41598-020-74270-y
AL-FAISAL, A. & MUTLAK, F. (2020) New record of Arabic whipray, Maculabatis arabica (Elasmobranchii: Myliobatiformes: Dasyatidae), from the Persian Gulf off Iraq. Acta Ichthyologica et Piscatoria, 50 (4): 471–474 http://dx.doi.org/10.3750/AIEP/02992
AMORIM-LOPES, C. & WILLMER, I.Q. & ARAUJO, N.L.F. & DE S. PEREIRA, L.H.S. & MONTEIRO, F. & ROCHA, R.C.C. & SAINT’PIERRE, T.D. & DOS SANTOS, L.N. & SICILIANO, S. & VIANNA, M. & HAUSER-DAVIS, R.A. (2020) Mercury screening in highly consumed sharpnose sharks (Rhizoprionodon lalandii and R. porosus) caught artisanally in southeastern Brazil. Science of the Anthropocene, 8 (1): 022 http://dx.doi.org/10.1525/elementa.022
ARAUJO, G. & LABAJA, J. & SNOW, S. & HUVENEERS, C. & PONZO, A. (2020) Changes in diving behaviour and habitat use of provisioned whale sharks: implications for management. Scientific Reports, 10 (1): 16951 http://dx.doi.org/10.1038/s41598-020-73416-2
BANGLEY, C.W. & CURTIS, T.H. & SECOR, D.H. & LATOUR, R.J. & OGBURN, M.B. (2020) Identifying Important Juvenile Dusky Shark Habitat in the Northwest Atlantic Ocean Using Acoustic Telemetry and Spatial Modeling. Marine and Coastal Fisheries, 12 (5): 348-363 http://dx.doi.org/10.1002/mcf2.10120
BARCELOS, L.M.D. & BARREIROS, J.P. (2020) Chondrichthyes diversity in Azores' EEZ. Poster Abstract. In: XIX Congresso Nacional de Ecologia, 09-11 dezembro 2020, Lisboa http://dx.doi.org/10.13140/RG.2.2.22624.51202
BARO-CAMARASA, I. & MARMOLEJO-RODRIGUEZ, A.J. & O'HARA, T.M. & ELORRIAGA-VERPLANCKEN, F.R. & TREJO-RAMIREZ, A. & MARTINEZ-RINCON, R.O. & GALVAN-MAGANA, F. (2021) Isotopic (delta N-15) relationship of pregnant females and their embryos: Comparing placental and yolk-sac viviparous elasmobranchs. Journal of Fish Biology, in press  http://dx.doi.org/10.1111/jfb.14625
BITENCOURT, G.R. & MELLO, P.A. & FLORES, E.M.M. & PIROLA, C. & CARNAROGLIO, D. & BIZZI, C.A. (2020) Determination of microplastic content in seafood: An integrated approach combined with the determination of elemental contaminants. Science of the Total Environment, 749: 142301 http://dx.doi.org/10.1016/j.scitotenv.2020.142301
BITON-PORSMOGUER, S. & LLORET, J. (2020) Potential impacts of bottom trawling on species of skates (Rajiformes: Rajidae): the case of the Gulf of Cadiz and the Western Mediterranean. Cybium, 44 (3): 255-263 http://dx.doi.org/10.26028/cybium/2020-443-006
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POLLERSPÖCK, J. & STRAUBE, N. (2020) An identification key to elasmobranch species based on dental morphological characters. Part B: extant Lamniform sharks (Superorder Galeomorphii: Order Lamniformes). Bulletin of Fish Biology, 19: 27-64
PORCU, C. & MARONGIU, M.F. & OLITA, A. & BELLODI, A. & CANNAS, R. & CARBONARA, P. & CAU, A. & MULAS, A. & PESCI, P. & FOLLESA, M.C. (2020) The demersal bathyal fish assemblage of the Central-Western Mediterranean: Depth distribution, sexual maturation and reproduction. Deep-Sea Research Part I-Oceanographic Research Papers, 166: 103394 http://dx.doi.org/10.1016/j.dsr.2020.103394
RAOULT, V. & TRUEMAN, C.N. & KINGSBURY, K.M. & GILLANDERS, B.M. & BROADHURST, M.K. & WILLIAMSON, J.E. & NAGELKERKEN, I. & BOOTH, D.J. & PEDDEMORS, V. & COUTURIER, L.I.E. & GASTON, T.F. (2020) Predicting Geographic Ranges of Marine Animal Populations Using Stable Isotopes: A Case Study of Great Hammerhead Sharks in Eastern Australia. Frontiers in Marine Science, 7: 594636 http://dx.doi.org/10.3389/fmars.2020.594636
RUIZ-ABIERNO, A. & MARQUEZ-FARIAS, J.F. & HUETER, R.E. & MACIAS-ROMERO, L. & BARROS-GARCIA, J.M. & GARCIA-CORDOVA, L. & HURTADO, A. & MILLER, V. (2020) Distribution and length composition of lemon sharks (Negaprion brevirostris) in a nursery ground in southern Cuba. Environmental Biology of Fishes, 103 (12): 1583-1594 http://dx.doi.org/10.1007/s10641-020-01050-y
RULIFSON, R.A. & BANGLEY, C.W. & CUDNEY, J.L. & DELL'APA, A. & DUNTON, K.J. & FRISK, M.G. & LOEFFLER, M.S. & BALAZIK, M.T. & HAGER, C. & SAVOY, T. & BRUNDAGE, H.M. & POST, W.C. (2020) Seasonal Presence of Atlantic Sturgeon and Sharks at Cape Hatteras, a Large Continental Shelf Constriction to Coastal Migration. Marine and Coastal Fisheries, 12 (5): 308-321 http://dx.doi.org/10.1002/mcf2.10111
RUTLEDGE, K.M. (2020) First record of Gorgona guitarfish (Pseudobatos prahli) off the Baja California peninsula with updated key to the guitarfishes of the North Eastern Pacific. Journal of Fish Biology, in press http://dx.doi.org/10.1111/jfb.14585
SANTANDER‐NETO, J. & FARIA, V.V. (2020) Sharks and rays caught by a small‐scale fisheries in the western equatorial Atlantic. Journal of Applied Ichthyology, 36 (6): 830-833 http://dx.doi.org/10.1111/jai.14103
SANTANDER-NETO, J. & YOKOTA, L. & DE MENESES, T.S. (2020) Parturition time for the Blacktip shark, Carcharhinus limbatus (Carcharhiniformes: Carcharhinidae), in Southwestern Atlantic. Neotropical Ichthyology, 18 (3): : e200029 http://dx.doi.org/10.1590/1982-0224-2020-0029
SEITZ, J.C. & WATERS, J.D. (2020) Did the five-meter-long largetooth sawfish that hangs from the rafters at the University of Iowa once swim in Louisiana waters? American Currents, 45 (4): 17-22
SERENA, F. & ABELLA, A.J. & BARGNESI, F. & BARONE, M. & COLLOCA, F. & FERRETTI, F. & FIORENTINO, F. & JENRETTE, J. & MORO, S. (2020) Species diversity, taxonomy and distribution of Chondrichthyes in the Mediterranean and Black Sea. European Zoological Journal, 87 (1): 497-536 http://dx.doi.org/10.1080/24750263.2020.1805518
SOTO-LOPEZ, K. & OCHOA-BAEZ, R.I. & GALVAN-MAGANA, F. & ODDONE, M.C. (2021) Reproductive biology of the Rasptail skate Rostroraja velezi (Rajiformes: Rajidae). Journal of Fish Biology, in press http://dx.doi.org/10.1111/jfb.14627
STE-MARIE, E. & WATANABE, Y.Y. & SEMMENS, J.M. & MARCOUX, M. & HUSSEY, N.E. (2020) A first look at the metabolic rate of Greenland sharks (Somniosus microcephalus) in the Canadian Arctic. Scientific Reports, 10 (1): : 19297 http://dx.doi.org/10.1038/s41598-020-76371-0
THOLAN, B. & CARLSON, P. & TORTOLERO-LANGARICA, J.J.A. & KETCHUM, J.T. & TREJO-RAMÍREZ, A. & ACEVES-BUENO, E. & CASELLE, J.E. (2020) The biodiversity of fishes at the Islas Marías Biosphere Reserve, Mexico, as determined by baited remote underwater video. Ciencias Marinas, 46 (4): 227–252 http://dx.doi.org/10.7773/cm.v46i4.3104
TSAI, W.P. & LIU, K.M. & CHANG, Y.J. (2020) Evaluation of Biological Reference Points for Conservation and Management of the Bigeye Thresher Shark, Alopias superciliosus, in the Northwest Pacific. Sustainability, 12 (20): 8646 http://dx.doi.org/10.3390/su12208646
TUCKER, J.P. & COLEFAX, A.P. & SANTOS, I.R. & KELAHER, B.P. & PAGENDAM, D.E. & BUTCHER, P.A. (2021) White shark behaviour altered by stranded whale carcasses: Insights from drones and implications for beach management. Ocean & Coastal Management, 200: 105477 http://dx.doi.org/10.1016/j.ocecoaman.2020.105477
UNO, Y. & NOZU, R. & KIYATAKE, I. & HIGASHIGUCHI, N. & SODEYAMA, S. & MURAKUMO, K. & SATO, K. & KURAKU, S. (2020) Cell culture-based karyotyping of orectolobiform sharks for chromosome-scale genome analysis. Communications Biology, 3 (1): 652 http://dx.doi.org/10.1038/s42003-020-01373-7
UYAN, A. & TURAN, C. & ERDOGAN-ELIUZ, E.A. & SANGUN, M.K. (2020) Antimicrobial properties of bioactive compounds isolated from epidermal mucus in two Ray species (Dasyatis marmorata and Gymnura altavela). Tropical Journal of Pharmaceutical Research, 19 (10): 2115-2121 http://dx.doi.org/10.4314/tjpr.v19i10.15
VALENTINOVICH, D.Y. & MARKOVICH, O.A. & YUR’EVNA, F.Y. (2020) Brief history of studies of cartilaginous fshes (Chondrichthyes: Elasmobranchii, Holocephali) of Sakhalin Island and adjacent waters with taxonomic notes. (In russian with english abstract) Bulletin of the Sakhalin Museum, 33 (4): 172-192
VANHOUTAN, K.S. & GAGNE, T.O. & REYGONDEAU, G. & TANAKA, K.R. & PALUMBI, S.R. & JORGENSEN, S.J. (2020) Coastal sharks supply the global shark fin trade. Biology Letters, 16 (10): 20200609 http://dx.doi.org/10.1098/rsbl.2020.0609
VAZQUEZ, J.A. & FRAGUAS, J. & GONZALEZ, P. & SERRA, J. & VALCARCEL, J. (2020) Optimal Recovery of Valuable Biomaterials, Chondroitin Sulfate and Bioapatites, from Central Skeleton Wastes of Blue Shark. Polymers, 12 (11): : 2613 http://dx.doi.org/10.3390/polym12112613
VELASCO-LOZANO, M.F. & RAMÍREZ-ORTIZ, G. & REYES-BONILLA, H. & HOLLARSMITH, J.A. (2020) Fish assemblages at mesophotic depths in the Pacific: a comparison between continental and oceanic islands of Mexico. Ciencias Marinas, 46 (4): 321–342 http://dx.doi.org/10.7773/cm.v46i4.3112
WHITEHEAD, D.A. & MAGANA, F.G. & KETCHUM, J.T. & HOYOS, E.M. & ARMAS, R.G. & PANCALDI, F. & OLIVIER, D. (2020) The use of machine learning to detect foraging behaviour in whale sharks: a new tool in conservation. Journal of Fish Biology, in press http://dx.doi.org/10.1111/jfb.14589
WOSNICK, N. & CHAVES, A.P. & NIELLA, Y.V. & TAKATSUKA, V. & HAZIN, F.H.V. & NUNES, J.L.S. & MORICK, D. (2020) Physiological Impairment as a Result of Bile Accumulation in an Apex Predator, the Tiger Shark (Galeocerdo cuvier Peron & Lesueur, 1822). Animals, 10 (11): 2030  http://dx.doi.org/10.3390/ani10112030
YAMAGUCHI, K. & KOYANAGI, M. & KURAKU, S. (2021) Visual and nonvisual opsin genes of sharks and other nonosteichthyan vertebrates: Genomic exploration of underwater photoreception. Journal of Evolutionary Biology, in press http://dx.doi.org/10.1111/jeb.13730
ZAVA, B. & INSACCO, G. & CORSINI-FOKA, M. & SERENA, F. (2020) Updating records of Squatina aculeata (Elasmobranchii: Squatiniformes: Squatinidae) in the Mediterranean Sea. Acta Ichthyologica et Piscatoria, 50 (4): 401–411  http://dx.doi.org/10.3750/AIEP/03033

Extinct Chondrichthyes:

AMADORI, M. & AMALFITANO, J. & GIUSBERTI, L. & FORNACIARI, E. & CARNEVALE, G. & KRIWET, J. (2020) The Italian record of the Cretaceous shark, Ptychodus latissimus Agassiz, 1835 (Chondrichthyes; Elasmobranchii). Peerj, 8: e10167 http://dx.doi.org/10.7717/peerj.10167
BATCHELOR, T.J. & DUFFIN, C.J. (2020) First description of sharks' teeth from the Ferruginous Sands Formation (Aptian, Early Cretaceous) of the Isle of Wight. Proceedings of the Geologists Association, 131 (3-4): 353-359 http://dx.doi.org/10.1016/j.pgeola.2019.06.004
COLLARETA, A. & MOLLEN, F.H. & MERELLA, M. & CASATI, S. & DI CENCIO, A. (2020) Ginglymostomatid-like multicuspid teeth in an elusive rajid skate from the Tuscan Pliocene. In: 64th Palaeontological Association Annual Meeting, 16–18 December 2020, Oxford University Museum of Natural History, Programme and Abstracts: 63
GOOLAERTS, S. & DE CEUSTER, J. & MOLLEN, F.H. & GIJSEN, B. & BOSSELAERS, M. & LAMBERT, O. & UCHMAN, A. & VAN HERCK, M. & ADRIAENS, R. & HOUTHUYS, R. & LOUWYE, S. & BRUNEEL, Y. & ELSEN, J. & HOEDEMAKERS, K. (2020) The upper Miocene Deurne Member of the Diest Formation revisited: unexpected results from the study of a large temporary outcrop near Antwerp International Airport, Belgium. Geologica Belgica, 23 (3-4): xxx-xxx http://dx.doi.org/10.20341/gb.2020.011
HARRISON, G.W.M. & KIRKLAND, J.I. & FISCHER, J. & SAN MIGUEL, G. & WOOD, J.R. & SANTUCCI, V.L. (2021) Two Chimaeroid egg case remains from the Late Cretaceous, Mesa Verde National Park, Colorado, USA. New Mexico Museum of Natural History and Science, Bulletin, 82: 113-120
HODNETT, J.-P. & ELLIOTT, D.K. & SANTUCCI, V.L. (2021) The Holocephalans (Chondrichthyes) of the Mississippian (Visean) Redwall Limestone, Grand Canyon National Park, Arizona. New Mexico Museum of Natural History and Science, Bulletin, 82: 141-144
HÖLTKE, O. & RASSER, M.W. & UNGER, E. & POLLERSPÖCK, J. (2020) The Elasmobranch Fauna from the Upper Marine Molasse (Lower Miocene, Burdigalian) of Ursendorf (District Sigmaringen, Baden-Württemberg, SW-Germany). Palaeontos, 33: 1‒56
HOVESTADT, D.C. (2020) Taxonomic adjustments of the Oligocene and Miocene Odontaspididae and Carchariidae based on extant specimens. Cainozoic Research, 20 (2): 229-255
MARRAMÀ, G. & CARNEVALE, G. & NAYLOR, G.J.P. & VARESE, M. & GIUSBERTI, L. & KRIWET, J. (2020) Anatomy, taxonomy and phylogeny of the Eocene guitarfishes from the Bolca Lagerstätten, Italy, provide new insights into the relationships of the Rhinopristiformes (Elasmobranchii: Batomorphii). Zoological Journal of the Linnean Society, in press: zlaa125 http://dx.doi.org/10.1093/zoolinnean/zlaa125
MOREAU, M. & DUFFIN, C.J. & HILDEBRANDT, C. & HUTCHINSON, D. & PARKER, A. & CARPENTER, S. & BENTON, M.J. (2021) Microvertebrates from the Rhaetian basal bone bed of Saltford, near Bath, SW England. Proceedings of the Geologists' Association, in press http://dx.doi.org/10.1016/j.pgeola.2020.11.003
REINECKE, T. & POLLERSPÖCK, J. & MOTOMURA, H. & BRACHER, H. & DUFRAING, L. & GÜTHNER, T. & VON DER HOCHT, F. (2020) Sawsharks (Pristiophoriformes, Pristiophoridae) in the Oligocene and Neogene of Europe and their relationships with extant species based on teeth and rostral denticles. Palaeontos, 33: 57‒163, 44 figures, 5 tables
SALAMA, Y. & ALTOOM, N.G. & ALLAM, A.A. & AJAREM, J.S. & ABD-ELHAMEED, S. (2020) Late Cretaceous anacoracid sharks (Squalicorax) from Duwi Formation, Gebel Duwi, central Eastern Desert, Egypt: qualitative and quantitative analyses. Historical Biology, in press http://dx.doi.org/10.1080/08912963.2020.1847102
SOKOLSKYI, T. & GUINOT, G. (2021) Elasmobranch (Chondrichthyes) assemblages from the Albian (Lower Cretaceous) of Ukraine. Cretaceous Research, 117: 104603 http://dx.doi.org/10.1016/j.cretres.2020.104603
YUN, C.-G. (2020) New Example of Cosmopolitodus hastalis (Lamniformes, Lamnidae) from the Miocene of South Korea. Zoodiversity, 54 (5): 433–438 http://dx.doi.org/10.15407/zoo2020.05.433

Parasites:
AICARDI, S. & AMAROLI, A. & GALLUS, L. & FERRANDO, S. (2020) Effects of nasal parasite species in the small-spotted catshark Scyliorhinus canicula (Scyliorhinidae; Carcharhiniformes). Journal of Vertebrate Biology, 69 (4): 20052 http://dx.doi.org/10.25225/jvb.20052
IRIGOITIA, M.M. & TAGLIORETTI, V. & TIMI, J.T. (2020) Dendrapta nasicola n. sp. (Copepoda: Siphonostomatoida: Lernaeopodidae) a parasite from the olfactory sacs of Bathyraja scaphiops (Norman, 1937) in the South Western Atlantic. Anais Da Academia Brasileira De Ciencias, 92: e20180933 http://dx.doi.org/10.1590/0001-3765202020180933
KRITSKY, D.C. & CHISHOLM, L.A. (2020) Monocotylids (Monogenoidea) infecting elasmobranchs in Moreton Bay, Queensland, Australia, with descriptions of Calicotyle cutmorei n. sp. (Calicotylinae) and Dendromonocotyle raiae n. sp. (Monocotylinae). Systematic Parasitology, 97 (6): 569-589 http://dx.doi.org/10.1007/s11230-020-09946-0
MORAVEC, F. & JUSTINE, J.L. (2020) Erection of Euterranova n. gen. and Neoterranova n. gen. (Nematoda, Anisakidae), with the description of E. dentiduplicata n. sp. and new records of two other anisakid nematodes from sharks off New Caledonia. Parasite, 27: 58 http://dx.doi.org/10.1051/parasite/2020053
TEDESCO, P. & GUSTINELLI, A. & CAFFARA, M. & MARSELLA, A. & TOFFAN, A. & FIORAVANTI, M.L. (2020) Morphological and molecular characterization of two gastrointestinal parasites in Mustelus mustelus (Linnaeus, 1758) from Adriatic Sea. European Zoological Journal, 87 (1): 616-623 http://dx.doi.org/10.1080/24750263.2020.1826588

MISCELLANEOUS:

Silky sharks find hope in Atlantic, remain targets in Indo-Pacific

Date: December 9, 2020
Source: Florida International University
Summary: New research shows that conservation efforts in the Atlantic Ocean may be working for one of the most popular -- and endangered -- species that ends up in the global shark fin trade

full story

Can sting rays and electric rays help us map the ocean floor?

Date: December 9, 2020
Source: RIKEN
Summary: Researchers have completed a feasibility study indicating that electric rays and sting rays equipped with pingers will be able to map the seabed through natural exploration.