NEWSLETTER 09/2018 03.09.2018

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

Pollerspöck, J. & Straube, N. 2018, Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali), www.shark-references.com, World Wide Web electronic publication, Version 2018

FLAMMENSBECK, C.K. & POLLERSPÖCK, J. & SCHEDEL, F.D.B. & MATZKE, N.J. & STRAUBE, N.  (2018) Of teeth and trees: A fossil tip‐dating approach to infer divergence times of extinct and extant squaliform sharks. Zoologica Scripta, in press

Abstract: Fossil tip‐dating allows for the inclusion of morphological data in divergence time estimates based on both extant and extinct taxa. Neoselachii have a cartilaginous skeleton, which is less prone to fossilization compared to skeletons of Osteichthyans. Therefore, the majority of the neoselachian fossil record is comprised of single teeth, which fossilize more easily. Neoselachian teeth can be found in large numbers as they are continuously replaced. Tooth morphologies are of major importance on multiple taxonomic levels for identification of shark and ray taxa. Here, we review dental morphological characters of squalomorph sharks and test these for their phylogenetic signal. Subsequently, we combine DNA sequence data (concatenated exon sequences) with dental morphological characters from 85 fossil and extant taxa to simultaneously infer the phylogeny and re‐estimate divergence times using information of 61 fossil tip‐dates as well as eight node age calibrations of squalomorph sharks. Our findings show that the phylogenetic placement of fossil taxa is mostly in accordance with their previous taxonomic allocation. An exception is the phylogenetic placement of the extinct genus †Protospinax, which remains unclear. We conclude that the high number of fossil taxa as well as the comprehensive DNA sequence data for extant taxa may compensate for the limited number of morphological characters identifiable on teeth, serving as a backbone for reliably estimating the phylogeny of both extinct and extant taxa. In general, tip‐dating mostly estimates older node ages compared to previous studies based on calibrated molecular clocks.

Paper request via researchgate or please send a mail to Nico or Jürgen!



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

Olivier Landemaine, 79 rue des Vignes – Les Châteliers, 17310 Saint Pierre d’Oléron, France

Interests in Chondrichthyans:
Reassessment and update of the concept of CASIER on Elasmobranchii teeth roots (or bases, basal plates).
Functional analysis of roots.

Partner in Google-Maps




New Images

Many thanks to the following people for providing images:

Frederik H. Mollen (Elasmobranch Research Belgium) for the images of Tetronarce nobiliana (BONAPARTE, 1835) (ERB 0844), male, 48,5 cm DW, 67,0 cm TL, North Sea 

Fabio dos Santos Motta, Universidade Federal de São Paulo - UNIFESP, for images of Rioraja agassizii (MÜLLER & HENLE, 1841)

Ebert, D.A. & Akhilesh, K.V. & Weigmann, S. for the image of the holotype of Planonasus indicus EBERT, AKHILESH & WEIGMANN, 2018, holotype, CMFRI GA., 630 mm TL, female, 

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:

CAPPETTA, H. & PFEIL, F.H. & SCHMIDT-KITTLER, N. (2000) New biostratigraphical data on the marine Upper Cretaceous and Palaeogene of Jordan. Newsletters on Stratigraphy, 38: 81–95.
MAO, Y. & MA, Q. & FENG, Q. (2013) Discovery of Fish Microremains in the Gufeng Formation at the Luojiaba Section from Jianshi, West Hubei. Acta Micropalaeontologica Sinica, 30 (2): 175–183

MENDIOLA, C. (1996) Rhincodon ferriolensis n. sp. (Neoselachii, Orectolobiformes, Rhincodontidae) del Burdigaliense superior de Elche (Sureste de España). Revista de la Societat Paleontológica d'Elx, 2: 1–6, 2 fig., 1 pl.

MENDIOLA, C. (1999) Myliobatoideos nuevos (Neoselachii, Batomorphii) del Thanesiense ? de oued Zem (Cuenca de los Ouled Abdoun, Marruecos). Revista de la Societat Paleontológica d'Elx, 6: 1–42, 10 fig., pl. 1–12

MENDIOLA, C. & MARTINEZ, J. (2003) La ictiofauna fósil (Chondrichthyes, Euselachii) del Mesozoico y Cenozoico de España. Revista de la Societat Paleontológica d'Elx, 9: 1–103

MENDIOLA, C. (2004) Primera cita española del género Ptychodus AGASSIZ 1839 (Chondrichthyes, Euselachii). Revista de la Societat Paleontológica d'Elx, 13: 1–14

MENDIOLA, C. & LÓPEZ, A. (2005) La ictiofauna fósil (Chondrichthyes, Euselachii) del Serravalliense de Alicante (Sureste de España). Revista de la Societat Paleontológica d'Elx, 14: 1–51

Extant Chondrichthyes:

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:


Save the date! 25. - 29. March 2019

The Mexican Society of Cartilaginous Fishes A.C., in coordination with the Planetarium of Playa del Carmen SAYAB, invites to participate in the First Latin American Conference of Sharks, Rays and Chimaeras, and the VIII National Symposium of Sharks and Rays.


5th International Whale Shark Conference (IWSC5) from 28-31 May 2019

From 28-31 May 2019, the town of Exmouth in the Ningaloo Coast World Heritage Area will welcome delegates to the 5th International Whale Shark Conference (IWSC5), a meeting of the world’s leading whale shark scientists, conservationists, natural resource managers and tourism managers. This is the fifth such conference to be held, following on from the successful IWSC4 held in Doha, Qatar in 2016. This meeting is timed to showcase Ningaloo’s world’s best practice whale shark management program and will follow the Ningaloo Whaleshark Festival, an annual community event that celebrates these magnificent animals.
IWSC5 will bring together local scientists, researchers and postgraduate students to interact with international colleagues and collaborators to explore all aspects of whale shark biology and ecology and how this can translate to direct, on-ground conservation efforts. Delegates from around the world will be treated to four days of presentations, workshops, social functions and experiencing the world renowned Ningaloo whale shark tourism industry to forge new relationships and collaborations and debate ideas.
A core focus of IWSC5 will be bringing together end users of the science being presented, such as tourism managers, marine park managers and conservation groups. This will improve the uptake and application of research and help develop collaborations between research scientists and managers and industry.
For further information contact iwsc5@dbca.wa.gov.au. The webpage is under construction, please add to your favourites www.iwsc5.info

Extant Chondrichthyes:

 Planonasus indicus sp. n., a new species of pygmy false catshark (Chondrichthyes: Carcharhiniformes: Pseudotriakidae), with a revised diagnosis of the genus and key to the family. Marine Biodiversity, in press
New species: Planonasus indicus
Abstract: A new species of the genus Planonasus is described from off southwestern India and Sri Lanka in the northern Indian Ocean. The new species occurs along the upper continental slope from 200 to 1000 m deep and was landed in fisheries for gulper sharks (Centrophorus spp.). Planonasus indicus sp. n. externally closely resembles P. parini (Carcharhiniformes: Pseudotriakidae), the only other member of the genus. It can be distinguished from P. parini by a combination of morphological characters including absence of oral papillae, lack of a distinct white mark on the free rear tip of the first dorsal fin, sides and underside of head, as well as fin edges that are similar in color as body (vs. dusky), more tooth rows in the lower jaw, shorter labial furrows, longer and less high spiracles, proportionally higher, more angular dorsal fins, especially the second dorsal fin, proportionally longer pectoral fins, a proportionally larger anal fin, longer distances from the snout tip to the origins of the caudal fin, both dorsal fins and the pelvic fins, as well as to the vent, and shorter distances for preorbital snout, prepectoral length, pelvic midpoint to second dorsal fin origin, and pelvic-anal space. A revised diagnosis of the genus and key to the family is also provided.

Extinct Chondrichthyes:
no news this month!

no news this month!

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

Latest Research Articles

Extant Chondrichthyes:
ALI, M. (2018) An updated Checklist of Marine fishes from Syria with an emphasis on alien species. Mediterranean Marine Science, 19 (2): 388-393  http://dx.doi.org/10.12681/mms.15850
ALMOJIL, D. & CLIFF, G. & SPAET, J.L.Y. (2018) Weak population structure of the Spot‐tail shark Carcharhinus sorrah and the Blacktip shark C. limbatus along the coasts of the Arabian Peninsula, Pakistan, and South Africa. Ecology and Evolution, in press  http://dx.doi.org/10.1002/ece3.4468
BELLODI, A. & PORCU, C. & CAU, A. & MARONGIU, M.F. & MELIS, R. & MULAS, A. & PESCI, P. & FOLLESA, M.C. & CANNAS, R. (2018) Investigation on the genus Squalus in the Sardinian waters (Central-Western Mediterranean) with implications on its management. Mediterranean Marine Science, 19 (2): 256-272  http://dx.doi.org/10.12681/mms.15426
BRACCINI, M. & DE LESTANG, S. & MCAULEY, R. (2018) Dusky sharks (Carcharhinus obscurus) undertake large-scale migrations between tropical and temperate ecosystems. Canadian Journal of Fisheries and Aquatic Sciences, 75 (9): 1525-1533  http://dx.doi.org/10.1139/cjfas-2017-0313
BURGOS-VÁZQUEZ, M.I. & CHÁVEZ-GARCÍA, V.E. & CRUZ-ESCALONA, V.H. & NAVIA, A.F. & MEJÍA-FALLA, P.A. (2018) Reproductive strategy of the Pacific cownose ray Rhinoptera steindachneri in the southern Gulf of California. Marine and Freshwater Research, in press  http://dx.doi.org/10.1071/MF18096
CALICH, H. & ESTEVANEZ, M. & HAMMERSCHLAG, N.  (2018) Overlap between highly suitable habitats and longline gear management areas reveals vulnerable and protected regions for highly migratory sharks.  http://dx.doi.org/10.3354/meps12671
CALTABELLOTTA, F.P. & SILVA, F.M. & MOTTA, F.S. & GADIG, O.B.F. (2018) Age and growth of the threatened endemic skate Rioraja agassizii (Chondrichthyes, Arhynchobatidae) in the western South Atlantic. Marine and Freshwater Research, in press  http://dx.doi.org/10.1071/MF18010
CARREON-ZAPIAIN, M.T. & FAVELA-LARA, S. & GONZALEZ-PEREZ, J.O. & TAVARES, R. & LEIJA-TRISTAN, A. & MERCADO-HERNANDEZ, R. & COMPEAN-JIMENEZ, G.A. (2018) Size, Age, and Spatial-Temporal Distribution of Shortfin Mako in the Mexican Pacific Ocean. Marine and Coastal Fisheries, 10 (4): 402-410  http://dx.doi.org/10.1002/mcf2.10029
CERUTTI-PEREYRA, F. & YÁNEZ, A.B. & EBERT, D.A. & ARNÉS-URGELLÉS, C. & SALINAS-DE-LEÓN, P.  (2018) New record and range extension of the Deepsea Skate, Bathyraja abyssicola (Chondrichthyes: Arhynchobatidae), in the Galapagos Islands. Journal of the Ocean Science Foundation, 30: 85–89  http://dx.doi.org/10.5281/zenodo.1400829
COLLIN, S.P. (2018) Scene through the eyes of an apex predator: a comparative analysis of the shark visual system. Clinical & Experimental Optometry, 101 (5): 624-640  http://dx.doi.org/10.1111/cxo.12823
CORSSO, J.T. & GADIG, O.B.F. & BARRETO, R.R.P. & MOTTA, F.S. (2018) Condition analysis of the Brazilian sharpnose shark Rhizoprionodon lalandii: evidence of maternal investment for initial post‐natal life. Journal of Fish Biology, in press  http://dx.doi.org/10.1111/jfb.13780
COUTURIER, L.I.E. & NEWMAN, P. & JAINE, F.R.A. & BENNETT, M.B. & VENABLES, W.N. & CAGUA, E.F. & TOWNSEND, K.A. & WEEKS, S.J. & RICHARDSON, A.J. (2018) Variation in occupancy and habitat use of Mobula alfredi at a major aggregation site. Marine Ecology Progress Series, 599: 125-145  http://dx.doi.org/10.3354/meps12610
DE FIGUEIREDO PETEAN, F. & DE CARVALHO, M.R. (2018) Comparative morphology and systematics of the cookiecutter sharks, genus Isistius Gill (1864) (Chondrichthyes: Squaliformes: Dalatiidae). PLoS ONE, 13 (8): e0201913  http://dx.doi.org/10.1371/journal.pone.0201913
DUFFY, C. & FRANCIS, M. & DUNN, M. & FINUCCI, B. & FORD, R. & HITCHMOUGH, R. & ROLFE, J. (2018) Conservation status of New Zealand chondrichthyans (chimaeras, sharks and rays), 2016. New Zealand Department of Conservation 
EBERT, D.A. & AKHILESH, K.V. & WEIGMANN, S. (2018) Planonasus indicus sp. n., a new species of pygmy false catshark (Chondrichthyes: Carcharhiniformes: Pseudotriakidae), with a revised diagnosis of the genus and key to the family. Marine Biodiversity, in press  http://dx.doi.org/10.1007/s12526-018-0915-4
GOETZE, J.S. & LANGLOIS, T.J. & MCCARTER, J. & SIMPFENDORTER, C.A. & HUGHES, A. & LEVE, J.T. & JUPITER, S.D. (2018) Drivers of reef shark abundance and biomass in the Solomon Islands. Plos One, 13 (7): e0200960  http://dx.doi.org/10.1371/journal.pone.0200960
GRAY, C.A. & KENNELLY, S.J. (2018) Bycatches of endangered, threatened and protected species in marine fisheries. Reviews in Fish Biology and Fisheries, 28 (3): 521-541  http://dx.doi.org/10.1007/s11160-018-9520-7
HAYES, E. & GODLEY, B.J. & NIMAK-WOOD, M. & WITT, M.J. (2018) Basking shark breaching behaviour observations West of Shetland. Marine Biodiversity Records, in press  http://dx.doi.org/10.1186/s41200-018-0151-4
HERBERT, A.M. & MOTTA, P.J. (2018) Biomechanics of the jaw of the durophagous bonnethead shark. Zoology, 129: 54–58  http://dx.doi.org/10.1016/j.zool.2018.07.001
IQBAL, M. & YUSTIAN, I. & ZULKIFLI, H. (2018) The valid Species and Distribution of Stingrays (Myliobatiformes: Dasyatidae) in South Sumatran waters, Indonesia. BIOVAENTIA Biological Research Journal, 4 (1): BIOV.4.1.2018.98  http://dx.doi.org/10.24233/BIOV.4.1.2018.98
JABADO, R.W. & KYNE, P.M. & POLLOM, R.A. & EBERT, D.A. & SIMPFENDORFER, C.A. & RALPH, G.M. & AL DHAHERI, S.S. & AKHILESH, K.V. & ALI, K. & ALI, M.H. & AL MAMARI, T.M.S. & BINEESH, K.K. & EL HASSAN, I.S. & FERNANDO, D. & GRANDCOURT, E.M. & KHAN, M.M. & MOORE, A.B.M. & OWFI, F. & ROBINSON, D.P. & ROMANOV, E. & SOARES, A. & SPAET, J.L.Y. & TESFAMICHAEL, D. & VALINASSAB, T. & DULVY, N.K. (2018) Troubled waters: Threats and extinction risk of the sharks, rays and chimaeras of the Arabian Sea and adjacent waters. Fish and Fisheries, in press  http://dx.doi.org/10.1111/faf.12311
JACOBS, P.K. & SHIMADA, K. (2018) Ontogenetic growth pattern of the extant smalltooth sandtiger shark,Odontaspis ferox (Lamniformes : Odontaspididae)  ─application from and to paleontology. Journal of Fossil Research, 51 (1):  23-29 
JAMBURA, P.L. & PFAFF, C. & UNDERWOOD, C.J. & WARD, D.J. & KRIWET, J. (2018) Tooth mineralization and histology patterns in extinct and extant snaggletooth sharks, Hemipristis (Carcharhiniformes, Hemigaleidae)—Evolutionary significance or ecological adaptation? PLoS ONE, 13 (8): e0200951  http://dx.doi.org/10.1371/journal.pone.0200951
JOUNG, S.-J. & LYU, G.-T. & HSU, H.-H. &LIU, K.-M. & WANG, S.-B. (2018) Age and growth estimates of the blue shark Prionace glauca in the central South Pacific Ocean. Marine and Freshwater Research, 69 (9): 1346-1354   http://dx.doi.org/10.1071/MF17098
KIMURA, L.F. & SANTOS-NETO, M. & BARBARO, K.C. & PICOLO, G. (2018) Potamotrygon motoro stingray venom induces both neurogenic and inflammatory pain behavior in rodents. Toxicon, 150: 168-174  http://dx.doi.org/10.1016/j.toxicon.2018.05.018
LEA, J.S.E. & WETHERBEE, B.M. & SOUSA, L.L. & AMING, C. & BURNIE, N. & HUMPHRIES, N.E. & QUEIROZ, N. & HARVEY, G.M. & SIMS, D.W. & SHIVJI, M.S. (2018) Ontogenetic partial migration is associated with environmental drivers and influences fisheries interactions in a marine predator. ICES Journal of Marine Science, 75 (4): 1383-1392  http://dx.doi.org/10.1093/icesjms/fsx238
LEE, K.A. & ROUGHAN, M. & HARCOURT, G. & PEDDEMORS, V.M. (2018) Environmental correlates of relative abundance of potentially dangerous sharks in nearshore areas, southeastern Australia. Marine Ecology Progress Series, 599: 157-179  http://dx.doi.org/10.3354/meps12611
LYNCH, P.D. & SHERTZER, K.W. & CORTES, E. & LATOUR, R.J. (2018) Abundance trends of highly migratory species in the Atlantic Ocean: accounting for water temperature profiles. ICES Journal of Marine Science, 75 (4): 1427-1438  http://dx.doi.org/10.1093/icesjms/fsy008
MACBETH, W.G. & BUTCHER, P.A. & COLLINS, D. & MCGRATH, S.P. & PROVOST, S.C. & BOWLING, A.C. & GERAGHTY, P.T. & PEDDEMORS, V.M. (2018) Improving reliability of species identification and logbook catch reporting by commercial fishers in an Australian demersal shark longline fishery. Fisheries Management and Ecology, 25 (3): 186-202  http://dx.doi.org/10.1111/fme.12276
MCMILLAN, M.N. & HUVENEERS, C. & SEMMENS, J.M. & GILLANDERS, B.M. (2018) Natural tags reveal populations of Conservation Dependent school shark use different pupping areas. Marine Ecology Progress Series, 599: 147-156  http://dx.doi.org/10.3354/meps12626
MEZA, L. & CÁCERES, J. & MORENO, G. & CASTILLO, M.C. & RAMÍREZ-MACÍAS, D. & SAAD, G. (2018) Re-authoring of guides from capacity development processes, the key to the sustainable management of the whale shark in La Paz Bay. Oral Presentation. Member of scientific review panel at the I SIMPOSIO PERUANO DE TIBURONES, RAYAS Y ESPECIES AFINES.  October 2017, Lima, Peru. 
MURPHY, S.E. & CAMPBELL, I. & DREW, J.A. (2018) Examination of tourists' willingness to pay under different conservation scenarios; Evidence from reef manta ray snorkeling in Fiji. Plos One, 13 (8): e1908279  http://dx.doi.org/10.1371/journal.pone.0198279
OGBURN, M.B. & BANGLEY, C.W. & AGUILAR, R. & FISHER, R.A. & CURRAN, M.C. & WEBB, S.F. & HINES, A.H. (2018) Migratory connectivity and philopatry of cownose rays Rhinoptera bonasus along the Atlantic coast, USA. Marine Ecology Progress Series, 602: 197-211  http://dx.doi.org/10.3354/meps12686
PINI-FITZSIMMONS, J. & KNOTT, N.A. & BROWN, C. (2018) Effects of food provisioning on site use in the short-tail stingray Bathytoshia brevicaudata. Marine Ecology Progress Series, 600: 99-110  http://dx.doi.org/10.3354/meps12661
PREBBLE, C.E.M. & ROHNER, C.A. & PIERCE, S.J. & ROBINSON, D.P. & JAIDAH, M.Y. & BACH, S.S. & TRUEMAN, C.N. (2018) Limited latitudinal ranging of juvenile whale sharks in the Western Indian Ocean suggests the existence of regional management units. Marine Ecology Progress Series, 601: 167-183  http://dx.doi.org/10.3354/meps12667
QUIGLEY, D.T.G. & DECARLOS, A. & BARROS-GARCIA, D. & MACGABHANN, D. (2018) Albino xanthochromic Homelyn Ray Raja montagui Fowler, 1910 (Elasmobranchii: Batoidea) from the Irish Sea. Bulletin of the European Association of Fish Pathologists, 38 (4): 165-170 
RICHARDS, R.J. & RAOULT, V. & POWTER, D.M. & GASTON, T.F. (2018) Permanent magnets reduce bycatch of benthic sharks in an ocean trap fishery. Fisheries Research, 208: 16-21  http://dx.doi.org/10.1016/j.fishres.2018.07.006
RITTER, E.K. & DELLIOS, A. (2018) On the Separation Mechanism between a Shark’s Tooth and Its Jaw Base, with Special Emphasis on an Observation Made from a White Shark, Carcharodon carcharias. Open Journal of Animal Sciences, 8: 329-334  http://dx.doi.org/10.4236/ojas.2018.83024
SILVA-GARAY, L. & PACHECO, A.S. & VÉLEZ-ZUAZO, X. (2018) First assessment of the diet composition and trophic level of an assemblage of poorly known chondrichthyans off the central coast of Peru. Environmental Biology of Fishes, in press  http://dx.doi.org/10.1007/s10641-018-0797-0
SIMMONS, P. & MEHMET, M.I. (2018) Shark management strategy policy considerations: Community preferences, reasoning and speculations. Marine Policy, 96: 111-119  http://dx.doi.org/10.1016/j.marpol.2018.08.010
TıRAŞıN, E.M. & BAŞUSTA, N. (2018) Near-term embryos and gravid females of Lusitanian cownose ray (Rhinoptera marginata) in Mersin Bay, eastern Mediterranean Sea. Marine and Freshwater Research, 69 (9): 1365-1371   http://dx.doi.org/10.1071/MF17356
TOMBERG, R.J. & CACHAPER, G.A. & WEINGART, G.S. (2018) Shark Related Injuries: A Case Series of Emergency Department Patients. American Journal of Emergency Medicine, 36 (9): 1645-1649  http://dx.doi.org/10.1016/j.ajem.2018.06.059
TSAGARAKIS, K. & NIKOLIOUDAKIS, N. & PAPANDROULAKIS, N. & VASSILOPOULOU, V. & MACHIAS, A. (2018) Preliminary assessment of discards survival in a multi-species Mediterranean bottom trawl fishery. Journal of Applied Ichthyology, 34 (4): 842-849  http://dx.doi.org/10.1111/jai.13691
WOSNICK, N. & NAVASS,  C.A. & NIELLA, Y.V. & MONTEIRO-FILHO, E.L.A. & FREIRE, C.A. & HAMMERSCHLAG, N. (2018) Thermal Imaging Reveals Changes in Body Surface Temperatures of Blacktip Sharks (Carcharhinus limbatus) during Air Exposure. Physiological and Biochemical Zoology, 91 (5): 1005-1012  http://dx.doi.org/10.1086/699484

Extinct Chondrichthyes:
BRONSON, A.W. & MAPES, R.H. & MAISEY, J.G. (2018) Chondrocranial morphology of Carcharopsis wortheni (Chondrichthyes, Euselachii incertae sedis) based on new material from the Fayetteville Shale (upper Mississippian, middle Chesterian). Papers in Palaeontology, 4 (3): 349-362  http://dx.doi.org/10.1002/spp2.1110
DUFFIN, C.J. (2018) A callorhynchid chimaeroid (Pisces, Holocephali) from the Nusplingen Plattenkalk (Late Jurassic, SW Germany). Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 289 (2):  161 - 175  http://dx.doi.org/10.1127/njgpa/2018/0756
GUINOT, G. & ADNET, S. & SHIMADA, K. & UNDERWOOD, C.J. & SIVERSSON, M. & WARD, D.J. & KRIWET, J. & CAPPETTA, H. (2018) On the need of providing tooth morphology in descriptions of extant elasmobranch species. Zootaxa, 4461 (1): 118–126  http://dx.doi.org/10.11646/zootaxa.4461.1.8
JAMBURA, P.L. & PFAFF, C. & UNDERWOOD, C.J. & WARD, D.J. & KRIWET, J. (2018) Tooth mineralization and histology patterns in extinct and extant snaggletooth sharks, Hemipristis (Carcharhiniformes, Hemigaleidae)—Evolutionary significance or ecological adaptation? PLoS ONE, 13 (8): e0200951  http://dx.doi.org/10.1371/journal.pone.0200951       
LANDINI, W. & COLLARETA, A. & DI CELMA, C. & MALINVERNO, E. & URBINA, M. & BIANUCCI, G. (2018) The early Miocene elasmobranch assemblage from Zamaca (Chilcatay Formation, Peru). Journal of South American Earth Sciences, in press  http://dx.doi.org/10.1016/j.jsames.2018.08.004        

no paper this month!


Palaeontologists, and we would argue neontologists too, need systematically useful, high-quality illustrations of the teeth when introducing each new living species. Schematic illustrations of the mouth gape are of little use. Proper photographic documentation of the dentition typically requires teeth to be carefully removed from the jaws to allow close-up photographs of each tooth morphotype in the dentition, possibly even by the use of a scanning electron microscope.

GUINOT, G. & ADNET, S. & SHIMADA, K. & UNDERWOOD, C.J. & SIVERSSON, M. & WARD, D.J. & KRIWET, J. & CAPPETTA, H. 2018 On the need of providing tooth morphology in descriptions of extant elasmobranch species. Zootaxa, 4461 (1): 118–126

image by Jürgen Pollerspöck:
upper row: a lower tooth of an extant Centrophorus granulosus (BLOCH & SCHNEIDER, 1801)
lower row: a lower tooth of Centrophorus aff. granulosus from lower miocene deposits (about 18 Ma old) from Bavaria, Germany


New study highlights shark protections, vulnerability to fishing

Important implications for shark protection from longline fishing activities

Date: August 23, 2018
Source: University of Miami Rosenstiel School of Marine & Atmospheric Science
Summary: A new analysis shows that the habitats of three shark species (great hammerhead, tiger, and bull sharks) are relatively well protected from longline fishing in federal waters off the southeastern United States, but that that some prime locations are still vulnerable to fishing.
Full story

'Biological passport' to monitor Earth's largest fish

Whale sharks, the world's largest fish, roam less than previously thought

Date: August 9, 2018
Source: University of Southampton
Summary: Whale sharks, the world's largest fish, roam less than previously thought. This new study used stable isotope analysis to demonstrate that whale sharks feeding at three disparate sites in the Western Indian Ocean and Arabian Gulf rarely swim more than a few hundred kilometers north or south from these areas according to researchers.

Full story