NEWSLETTER 6/2025 20.06.2025

NEW PARTNERS OF SHARK-REFERENCES

Name: Shigehiro Kuraku representing the consortium Squalomix
Website: https://squalomix.github.io/

About Squalomix:

Our project Squalomix aims at unveiling the unique evolutionary trajectory of sharks and rays and is sustained by tight collaborations involving an academic sequencing core facility and multiple public aquariums. By means of multimodal omics and molecular evolutionary approaches, it tackles various biological questions including morphological evolution, sensory systems, and reproduction including sex determination.
 

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

Partner in Google-Maps:

Upcoming Meetings:

XI Simposio Nacional de Tiburones y Rayas

20 - 24 October  2025

La Sociedad Mexicana de Peces Cartilaginosos, A. C. (SOMEPEC), en coordinación con el
Caracol Museo de Ciencias y la Facultad de Ciencias Marinas de la Universidad Autónoma de
Baja California, campus Ensenada, en el marco del XI Simposium Nacional de Tiburones y
Rayas, convocan a participar en la presentación de trabajos en las áreas de Pesquerías,
Comportamiento, Migraciones, Taxonomía, Alimentación, Reproducción, Edad y Crecimiento,
Ecología, Toxicología, Parasitología, Genética, Conservación, y cualquier otro tema vinculado
con el estudio de los condrictios.

Lugar y fecha
Ensenada, Baja California, México, teniendo como sedes el Caracol Museo de Ciencias y la
Facultad de Ciencias Marinas de la Universidad Autónoma de Baja California, del 20 al
24 de octubre de 2025. Los días 20 y 21 se impartirán cursos especializados para el estudio
de los condrictios, en la Facultad de Ciencias Marinas y del 22 al 24 corresponderán a la
presentación de conferencias magistrales y de trabajos de los asistentes en las diferentes
modalidades.

 

Most popular posts at our Shark References Facebook page:

Nr. 1 (141 Likes/Emojis, 54 Shares):

-OPEN ACCESS-
https://onlinelibrary.wiley.com/doi/10.1111/jfb.70052

Giants in the cold: Morphological evidence for vascular heat retention in the viscera but not in skeletal muscle of the basking shark (Cetorhinus maximus)

C. Antonia Klöcker, Axel Schlindwein, Martin C. Arostegui, Ingrid M. Bruvold, Joel V. Wernström, Montserrat Martin-Armas, David W. Sims, Nicolas Straube, Andreas Altenburger, Claudia Junge

Keywords: histology, Lamniformes, mesothermy, red muscle distribution, regional endothermy, thermoregulation

Reference:
Klöcker, C.A., Schlindwein, A., Arostegui, M.C., Bruvold, I.M., Wernströn, J.V., Martin-Armas, M., Sims, D.W., Straube, N., Altenburger, A., Junge, C., in press. Giants in the cold: Morphological evidence for vascular heat retention in the viscera but not in skeletal muscle of the basking shark (Cetorhinus maximus). J. Fish Biol. https://doi.org/10.1111/jfb.70052

Shark references:
https://shark-references.com/species/view/Lamna-nasus
https://shark-references.com/.../Somniosus-microcephalus
https://shark-references.com/species/view/Cetorhinus-maximus

Nr. 2 (71 Likes/Emojis, 12 Shares):

New paper, co-authored by team shark-references
Here, we analyzed the immediate response of fish communities (elasmobranchs and actinopterygians) to the ecological upheavals across the end-Cretaceous extinction event (~66 Ma) based on >9,000 fossil microremains. Our analyses show a sharp decline in actinopterygian ichthyolith abundance with a simultaneous increase in elasmobranch diversity and abundance following the end-Cretaceous event. Tooth measurements indicate a boost in elasmobranch tooth size in postextinction communities, while the size range of severely affected actinopterygians remained stable. The marked decline in actinopterygians is associated with upheavals in the lower food web and may be related to their dependence on the latter during early life stages.
I. Feichtinger,M. Harzhauser,J. Pollerspöck,G. Auer,S. Ćorić,M. Kranner,M. Kallanxhi,A.E. Weinmann,& G. Guinot, Ecological restructuring of North Tethyan marine vertebrate communities triggered by the end-Cretaceous extinction, Proc. Natl. Acad. Sci. U.S.A. 122 (22) e2409366122,
https://doi.org/10.1073/pnas.2409366122
#extinction #massextinction #massextinctions #shark #sharks #fish #cretaceous #cretaceousperiod #paleogene

Nr. 3 (41 Likes/Emojis, 7 Shares):

OPEN ACCESS
Neotrygon romeoi n. sp. (Dasyatidae), a new species of blue-spotted maskray from Fiji, previously confused with Neotrygon kuhlii (Müller and Henle 1841) or Neotrygon trigonoides (Castelnau 1873), is described based on nine specimens (310–397 mm disc width) from Fiji. Neotrygon romeoi n. sp. is a large maskray with a broadly angled snout, long claspers in adult males and a median row of thornlets extending from the nape to the tail base. Fresh specimens have a brownish dorsal surface with dark mask-like marking covering across and between the eyes (sometimes indistinct), two large brown to black branchial blotches posterior to the spiracles, numerous black pepper-like spots mainly concentrated in masked area and the branchial blotches, and sometimes having small, dark-edged pale blue to whitish spots. The new species is further characterized by ocellated spots in the medial belt usually absent.
Glaus, K. & White, W.T. & O'Neill, H.L. & Thurnheer, S. & Appleyard, S.A. 2025 A new blue-spotted Maskray species (Neotrygon, Dasyatidae) from Fiji. Journal of Fish Biology, in press
https://onlinelibrary.wiley.com/doi/10.1111/jfb.70094
https://shark-references.com/species/view/Neotrygon-romeoi
images by the authors
#maskray #newspecies #Fiji #fiji #sharkreferences

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:

new entry:  Silva, E.M. & Gallo, V. (2002): New occurrence of Myliobatiformes (Chondrichthyes: Batoidea) in the Maria Farinha Formation, Paleocene of the Pernambuoc-Paraiba Basin, Northeastern Brazil. Boletim do Museu Nacional, 65, 1–11
new entry:  Santos, R.S.  (1968): A paleoictiofauna da formacao Santana - Euselachii. Anais da Academia Brasileira de Ciências, 40(4), 491–497



Extant Chondrichthyes:

new entry:  Gosztonyi, A.E. (1973) Sobre el dimorfismo sexual secundario en Halaelurus bivius (Müller y Henle, 1841) Garman 1913 (Elasmobranchii, Scyliorhinidae) en aguas Pagagonico-Fueguinas. Physis, A, 32(85), 317–323

new entry:  Pokapunt, W,J. & Tantivala, A. & Munprasit & Samrankitdamrong, P.  (1983) Some deep-sea fishes in the Andaman Sea. Exploratory Fishing Division, Department of Fisheries, Bangkok, 70 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

Extinct Chondrichthyes:

Johns, M.J. & Fischer, J. & Makahnouk, W.R.M. & Nyborg, T. & Deom, E. & Bowen, D. &  Bartlett, R. (2025): First chimaeroid fish egg capsule (Chondrichthyes, Holocephali, Chimaeriformes) from upper Eocene Carmanah Group strata, West Coast of Vancouver Island, British Columbia, Canada. Canadian Journal of Earth Sciences, 62(5), 1013–1042
New species: Vaillantoonia jonasoni
Abstract: A rare and new fossil chimaeroid fish egg capsule specimen was discovered in marine lower Carmanah Group strata at Botanical Beach, Vancouver Island, British Columbia, Canada. The age of the egg capsule is late Eocene (35.35 ± 0.12 Ma), determined by strontium isotope dating and foraminifera biostratigraphy. The new specimen is a three-dimensional mold in calcareous sandstone and is herein described as a new ichnospecies, Vaillantoonia jonasoni. Based on several morphological characteristics (e.g., spindle-like body shape, widened tail tip, narrow anterior spatula-shaped beak, and numerous lateral membrane costae), the new fossil is similar to the egg capsules of extant Rhinochimaeridae (Chimaeriformes). Following earlier discoveries of Vaillantoonia alaskana (Brown, 1946) (middle Oligocene, Alaska), Vaillantoonia sp. 1 (Oligocene, Washington), and Vaillantoonia sp. 2 (upper Eocene, Oregon), this is the fourth Paleogene chimaeroid egg capsule from the Pacific Northwest. The new form clearly differs from the other previously described Pacific Northwest specimens and from other rhinochimaerid-like egg capsules. The base of the Carmanah Group section at Botanical Beach is eroded, containing conglomerate and sandstone with diagnostic upper Eocene middle–upper bathyal foraminifera. The upper part of the section contains massive gravity flow sands that buried the new egg capsule (later bound and preserved by migrating carbonates in solution). Carmanah Group strata at Botanical Beach record part of a complex tectonic history within an elongate forearc basin similar to other Eocene/Oligocene North American West Coast basins from which rhinochimaerid egg capsule fossils are known.

Artüz, M.L. & Sakinç, M. (2025): Description of a new species, Xiphodolamia maliki sp. nov. and the shark teeth of Middle Eocene (Lutetian) aged Soğucak Formation in Küçükçekmece, Istanbul, Turkey. Zootaxa, 5646(4), 527–544
New species: Xiphodolamia maliki
Abstract: In 1954–1955, the prominent geologist, Ord. Prof. Malik Sayar (1862–1965) from the Geological Sciences Institute at Istanbul Technical University (ITU), collected fossil shark teeth from the Eocene deposits of Küçükçekmece, Turkey, specifically the Soğucak Formation. The İhsan Ketin Museum at ITU preserved these teeth for decades. Among the collection, 31 teeth belong to Macrorhizodus cf. praecursor, 2 to Otodus sokolovi, 44 to the genus Xiphodolamia, and 43 remain unidentified, for a total of 120 teeth. Xiphodolamia spp. are rare in the fossil record and are represented solely by isolated teeth. This study aims to reclassify the museum specimens that were previously identified at the genus level as Lamna sp. to compare the teeth of the Xiphodolamia genus with other classified members of this genus and to highlight the differences that warrant renaming these specimens as Xiphodolamia maliki sp. nov. For this purpose, the morphology and internal tooth structure of these teeth, collected by Malik Sayar from the Küçükçekmece Eocene deposits, were compared with those of teeth sourced from different origins. In addition, this paper documents other teeth collected by Malik Sayar from the Lutetian-aged Soğucak Formation of the Eocene Epoch and provides information on the geological context, the palaeoecology of the formation, and the autecology of the species.


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

Ahr, B.J. & Reyier, E.A. & Iafrate, J.D. & Kalinowsky, C. & Arendt, M. & Frazier, B.S. & Stolen, E.D. (2025): Multi-year migrations of four coastal shark species in the southeastern USA: trends in timing and temperature. Marine Ecology Progress Series, 758, 103–123  https://dx.doi.org/10.3354/meps14823
An, Y.H. & Wei, G.Y. & Ou, J.P. (2025): Mitigation of fluctuating lift and drag on a cylinder with a biomimetic synthetic jet orifice device inspired by shark pectoral fins. Ocean Engineering, 329, Article 121157  https://dx.doi.org/10.1016/j.oceaneng.2025.121157
Anderson, B.N. & Hammerschlag, N. & Saul, S. & Dodd, J.F. & Bowlby, H.D. & Kang, Y. & Gallagher, A.J. & Sulikowski, J.A. (2025): Life stage and seasonal habitat use of the porbeagle Lamna nasus in the Northwest Atlantic Ocean. Frontiers In Marine Science, 12, Article 1553509  https://dx.doi.org/10.3389/fmars.2025.1553509
Andrzejaczek, S. & Chapple, T.K. & Digiacomo, A.E. & Jorgensen, S.J. & Anderson, S.D. & Castleton, M. & Kanive, P.E. & Reimer, T.E.J. & White, T.D. & Block, B.A. (2025): Seasonal patterns of adult and subadult white shark presence at coastal aggregation sites in central California. Wildlife Research, 52(5), Article WR24136  https://dx.doi.org/10.1071/WR24136
Arpaia, M. & Bottaro, M. & Bonanomi, S. & Sperone, E. & Gargano, N. & Sinopoli, M. & Lucchetti, A. & Principato, E. & Carbonara, P. & Follesa, M.C. & Di Lauro, I. & Mojetta, A.R. & Consalvo, I. & Trova, F. & Greco, S. (2025): Safeguarding the Great White: Fisher Engagement as a Cornerstone for Elasmobranch Conservation in the Mediterranean. Aquatic Conservation-Marine and Freshwater Ecosystems, 35(5), Article e70143  https://dx.doi.org/10.1002/aqc.70143
Arpaia, M. & Sperone, E. & Mojetta, A.R. & Sinopoli, M. & Gargano, N. & Trova, F. & Di Lauro, I. & Principato, E. & Consalvo, I. & Carbonara, P. & Follesa, M.C. & Bottaro, M. (2025): First documented association between stingrays and carangids in the Mediterranean Sea. Marine Biodiversity, 55(3), Article 35  https://dx.doi.org/10.1007/s12526-025-01520-5
Avila, S.P. (2025): Commentary: Sharks in Cabo Verde, Canarias, Madeira and Azores islands: species richness, conservation status and anthropogenic pressures. Frontiers In Marine Science, 12, Article 1582463  https://dx.doi.org/10.3389/fmars.2025.1582463
Báez, J.C. & Domingo, A. & Torreblanca, D. & Doadrio, I. (2025): Initiative to stop trade of shark fins within the EU: Is it a good thing for sharks? Marine Policy, 178, Article 106716  https://dx.doi.org/10.1016/j.marpol.2025.106716
Bagnoli, S. & Drago, D.L. & Astoricchio, E. & Chiavacci, E. & Fronte, B. & Cellerino, A. & Tozzini, E.T. (2025): Comparative Analysis of Localization and Composition of Adult Neurogenic Niches in the Chondrichthyans Raja asterias and Torpedo ocellata. International Journal of Molecular Sciences, 26(8), Article 3563  https://dx.doi.org/10.3390/ijms26083563
Balchin, G.P. & Schuller, A. & di Stefano, I. & Robertson, M. & Pollard, K. & Hughes, W.O.H. (2025): Seasonality, long-term trends and co-occurrence of sharks in a top predator assemblage. Plos One, 20(2), Article e0318011  https://dx.doi.org/10.1371/journal.pone.0318011
Brown, K. & Puschendorf, R. (2025): Future climate-driven habitat loss and range shift of the Critically Endangered whitefin swellshark (Cephaloscyllium albipinnum). PeerJ, 13, Article e18787  https://dx.doi.org/10.7717/peerj.18787
Buschmann, J. & Roques, K.G. & Davies, J.S. & Dissanayake, A. & Keeping, J.A. (2025): Corrigendum: Novel approach to studying marine fauna: using long-life remote underwater video cameras to assess occurrence and behaviour of threatened and data-deficient elasmobranch species in southern Mozambique (vol 11, 1518710, 2024). Frontiers In Marine Science, 12, Article 1591254  https://dx.doi.org/10.3389/fmars.2025.1591254
Carrillo-Colín, L.D. & Márquez-Farias, J.F. & Castillo-Géniz, J.L. & Zamora-García, O.G. (2025): Age and Length at Maturity of Pelagic Thresher (Alopias pelagicus) in the Mexican Pacific. Thalassas, 41(2), Article 73  https://dx.doi.org/10.1007/s41208-025-00828-0
Carroll, A. & Chowdhury, M. & Zheng, C. & Ghazali, S. & Palanivel, S. & Walker, S.L. & Kew, A. (2025): Stingray Injury Complicated by Vibrio alginolyticus Wound Infection and Posterior Tibial Artery Pseudoaneurysm in a Returning Traveler. American Journal of Tropical Medicine and Hygiene, 112(3), Article   https://dx.doi.org/10.4269/ajtmh.24-0498
Castanhola-Dias, L. & Lameiras, J. & Coelho, G. & Zychar, B.C. & Dale, C. & Oliveira, V.R.D. & Cury, D.P. & Silva, K.D. & Pimenta, D.C. & Morales-Gamba, R.D. & Falla, M.V.A. & Costa, O. (2025): A deep dive into the venom apparatus of the freshwater stingray: an integrated investigation of biochemical, morphological, and pathophysiological parameters. Toxin Reviews, in press  https://dx.doi.org/10.1080/15569543.2025.2461000
Chiavacci, E. & Camera, R. & Costa, M. & Fronte, B. & Tozzini, E.T. & Cellerino, A. (2025): Nerve Growth Factor Receptor (NGFR/p75NTR) of the Small-Spotted Catshark (Scyliorhinus canicula): Evolutionary Conservation and Brain Function. Journal of Comparative Neurology, 533(4), Article e70049  https://dx.doi.org/10.1002/cne.70049
Clark, Z.S.R. & Miller, A.D. & Sherman, C.D.H. & Morris, S. & Weeks, A.R. & Butcher, P.A. (2025): Improving white shark detection capabilities in an Australian bather protection programme using environmental DNA. Ices Journal of Marine Science, 82(4), Article fsaf043  https://dx.doi.org/10.1093/icesjms/fsaf043
Coulon, N. & Elliott, S. & Barreau, T. & Lucas, J. & Gousset, E. & Feunteun, E. & Carpentier, A. (2025): Elasmobranch vulnerability to global warming: insights from bioenergetic modelling of catsharks under climate scenarios. Ecological Modelling, 506, Article 111157  https://dx.doi.org/10.1016/j.ecolmodel.2025.111157
Cross, M. & Mitchell, J. & Scott-Holland, T. (2025): High-resolution mapping of shark movements from drone footage at Queensland beaches improves risk assessment for beach safety. Marine Policy, 179, Article 106737  https://dx.doi.org/10.1016/j.marpol.2025.106737
da Rocha, P.P. & Marsili, T. & Barkai, A. & Figueiredo, I. & Dias, E. & Modesto, T. & Relvas, P. & Teodosio, A. & Aranha, S.G. (2025): Remote monitoring of the bycatch of demersal chondrichthyans using video imagery: a case study from a deep-water crustacean trawler. Marine Ecology Progress Series, 756, 83–94  https://dx.doi.org/10.3354/meps14801
De La Cruz-Macías, E. & Mejía, D. & Vianna, G.M.S. (2025): First record of scoliosis in a free-swimming scalloped hammerhead shark (Sphyrna lewini) in the Galápagos Islands. Environmental Biology of Fishes, 108(6), 987–993  https://dx.doi.org/10.1007/s10641-025-01698-4
Del Moral-Flores, L.F. & Lozano-Quiroz, S.A. & Escartín-Alpizar, V.R. & García-Mercado, E. & Hernández-Ortiz, R. (2025): First record of the bluntnose sixgill shark, Hexanchus griseus (Elasmobranchii, Hexanchiformes, Hexanchidae), from the southwestern Gulf of Mexico. Acta Ichthyologica et Piscatoria, 55, 115–121  https://dx.doi.org/10.3897/aiep.55.147223
dos Santos, A.R. .J.r. & Cope, J.M. & Robert, M.D. & Oliveira, J.E.L. & Lessa, R.P.T. & Nobrega, M.F. (2025): Using functional diversity to assess fish community susceptibility to multi-species coastal gillnetting in the East and South Brazilian Shelves. Marine Ecology Progress Series, 758, 125–142  https://dx.doi.org/10.3354/meps14828
Espinosa, L.D.S. & Lacerda, A.L. & Oddone, M.C. & Kessler, F. & Proietti, M.C. (2025): Interaction of elasmobranchs with litter in South Brazil: ingestion and oviposition patterns. Marine Pollution Bulletin, 216, Article 117992  https://dx.doi.org/10.1016/j.marpolbul.2025.117992
Fasola, E. & Santolini, C. & Villa, B. & Zanoletti, A. & Magni, G. & Pachner, J. & Stefani, F. & Boldrocchi, G. & Bettinetti, R. (2025): Integrating traditional and innovative monitoring approaches to monitor the marine biodiversity in the Tyrrhenian Sea (Mediterranean sea). Marine Environmental Research, 208, Article 107160  https://dx.doi.org/10.1016/j.marenvres.2025.107160
Faure, J. & Péron, C. & Jones, R. & Grima, M. & Appert, C. & Gasco, N. & Lamb, T. & Ziegler, P. & Cleeland, J. (2025): Condition assessment and best-practice handling guidelines for skate (Rajiformes) bycatch: Lessons from demersal longline fisheries in the Southern Indian Ocean. Fisheries Research, 285, Article 107357  https://dx.doi.org/10.1016/j.fishres.2025.107357
Flores, M.L.D. & Reis, V.C.L. & Bonetti, C. & Macena, B.C.L. & de Freitas, R.H.A. (2025): Whale shark (Rhincodon typus) along the Brazilian coast: occurrence, distribution, and environmental factors. Environmental Biology of Fishes, in press  https://dx.doi.org/10.1007/s10641-025-01690-y
Gayford, J.H. (2025): The adaptability of facultative parthenogenesis and 'multiple embryos per eggcase' as alternative reproductive strategies in Chondrichthyes. Royal Society Open Science, 12(4), Article 242030  https://dx.doi.org/10.1098/rsos.242030
Gharabaghi, S.A. (2025): A Non-Invasive Video-Based Method for Tracking Marine Megafauna Movement: A Pilot Study Using a 24-Second Whale Shark Video from the Persian Gulf. Integrative and Comparative Biology, in press  https://dx.doi.org/10.1093/icb/icaf018
Gilmour, M.E. & Pollock, K. & Adams, J. & Block, B.A. & Caselle, J.E. & Filous, A. & Friedlander, A.M. & Game, E.T. & Hazen, E.L. & Hill, M. & Holmes, N.D. & Lafferty, K.D. & Maxwell, S.M. & Mccauley, D.J. & Schallert, R. & Shaffer, S.A. & Wolff, N.H. & Wegmann, A. (2025): Multi-Species Telemetry Quantifies Current and Future Efficacy of a Remote Marine Protected Area. Global Change Biology, 31(4), Article e70138  https://dx.doi.org/10.1111/gcb.70138
Glaus, K. & White, W.T. & O'Neill, H.L. & Thurnheer, S. & Appleyard, S.A. (2025): A new blue-spotted Maskray species (Neotrygon, Dasyatidae) from Fiji. Journal of Fish Biology, in press  https://dx.doi.org/10.1111/jfb.70094
Hermans, A. & Maas, D.L. & Neta, L.M.V.D. & Spanings, T. & Winter, H.V. & Murk, A.J. & Foekema, E.M. (2025): An egg case study: Chronic exposure to AC electromagnetic fields results in hyperactivity in thornback ray (Raja clavata L.) embryos. Marine Environmental Research, 209, Article 107151  https://dx.doi.org/10.1016/j.marenvres.2025.107151
Hermans, A. & Maris, T. & Hubert, J. & Rochas, C. & Scott, K. & Murk, A.J. & Winter, H. (2025): From subsea power cable to small-spotted catshark Scyliorhinus canicula: Behavioural effects of electromagnetic fields in tank experiments. Marine Environmental Research, 208, Article 107127  https://dx.doi.org/10.1016/j.marenvres.2025.107127
Hermans, A. & Sumner-Hempel, A. & van den Brink, X. & van Berkel, D. & Olie, R.A. & Winter, H.V. & Murk, A. & Nijland, R. (2025): Elasmobranchs in offshore wind farms. Ocean & Coastal Management, 266, Article 107671  https://dx.doi.org/10.1016/j.ocecoaman.2025.107671
Huerta-Beltrán, B.L. & Drymon, J.M. & Jargowsky, A.E. & Kyne, P.M. & Phillips, N.M.  (2025): An invisible trade in imperiled guitarfishes. Conservation Biology, in press, Article e70087  https://dx.doi.org/10.1111/cobi.70087
Indurain, M.J. & Mancilla, A. & Brizuela, L. & Vargas-Caro, C. & Bustamante, C. (2025): New record of Frilled shark Chlamydoselachus anguineus Garman, 1884 (Chondrichthyes: Hexanchiformes) in the South Pacific Ocean. PeerJ, 13, Article e18992  https://dx.doi.org/10.7717/peerj.18992
Jeanne, F. & Pilet, S. & Bernay, B. & Lagadu, S. & Delépéé, R. & Dufour, S. & Sourdaine, P. (2025): Characterization of a direct role of GnRHs in the control of spermiogenesis and steroidogenesis in the small-spotted catshark Scyliorhinus canicula☆. General and Comparative Endocrinology, 368, Article 114734  https://dx.doi.org/10.1016/j.ygcen.2025.114734
Jeanne, F. & Pilet, S. & Combarnous, Y. & Bernay, B. & Dufour, S. & Favrel, P. & Sourdaine, P. (2025): Pleiotropic signaling of single-chain thyrostimulin (GPB5-GPA2) on homologous glycoprotein hormone receptors (ScFSHR, ScLHR, ScTSHR) in the elasmobranch Scyliorhinus canicula reproduction. Molecular and Cellular Endocrinology, 604, Article 112553  https://dx.doi.org/10.1016/j.mce.2025.112553
John, S. & Bijo, A. & Chatakonda, M.K. & Chattopadhyay, S. (2025): Landing Records of Elusive Crocodile Sharks Pseudocarcharias kamoharai (Pseudocarchariidae) From India. Thalassas, 41(2), Article 93  https://dx.doi.org/10.1007/s41208-025-00821-7
Klöcker, C.A. & Bjelland, O. & Ferter, K. & Arostegui, M.C. & Braun, C.D. & da Costa, I. & Cidade, T. & Queiroz, N. & Sims, D.W. & Junge, C. (2025): Basking sharks of the Arctic Circle: year-long, high-resolution tracking data reveal wide thermal range and prey-driven vertical movements across habitats. Animal Biotelemetry, 13, Article 15  https://dx.doi.org/10.1186/s40317-025-00407-3
Klöcker, C.A. & Schlindwein, A. & Arostegui, M.C. & Bruvold, I.M. & Wernström, J.V. & Martin-Armas, M. & Sims, D.W. & Straube, N. & Altenburger, A. & Junge, C. (2025): Giants in the cold: Morphological evidence for vascular heat retention in the viscera but not the skeletal muscle of the basking shark (Cetorhinus maximus). Journal of Fish Biology, in press  https://dx.doi.org/10.1111/jfb.70052
Krisnafi, Y. & Novianto, D. & Permana, K. & Sari, R.P. & Arkham, M.N. (2025): Shark Capture using Small-Scale Longline Drift Fisheries in the Southern Indian Ocean of Java, Indonesia. Thalassas, 41(2), Article 86  https://dx.doi.org/10.1007/s41208-025-00839-x
Lambert, C. & Broderick, A.C. & Beton, D. & Cañadas, A. & Dars, C. & Di Matteo, A. & Gilbert, L. & Giménez, J. & Keramidas, I. & Navarro, J. & Palmer, J.L. & Snape, R.T.E. & Sparks, L. & Spitz, J. & Tsikliras, A.C. & Virgili, A. & Grémillet, D. (2025): Energyscapes pinpoint marine megafauna feeding hotspots in the Mediterranean. Proceedings of The National Academy of Sciences of The United States of America, 122(6), Article e2412845122  https://dx.doi.org/10.1073/pnas.2412845122
Loca, S.L. & Garbett, A. & Houghton, J.D.R. & Thorburn, J. & Cadhla, O. & Clarke, M. & Hannon, G. & Pothanikat, L. & Mayo, P.A. & Gallagher, R. & Hoppner, M.D.J. & Collins, P.C. (2025): A research toolbox for regional data collection to support the conservation of large batoids: A case study on the critically endangered flapper skate (Dipturus intermedius). Conservation Science and Practice, in press  https://dx.doi.org/10.1111/csp2.70052
Martinez, A. & Hall, L.M. & Fuentes, M.A. & Putland, R.L. & Mensinger, A.F. (2025): The effects of anthropogenic sound on embryonic little skates (Leucoraja erinacea) and chain catsharks (Scyliorhinus rotifer). Journal of Experimental Biology, 228(6), Article jeb249394  https://dx.doi.org/10.1242/jeb.249394
Mejía, D. & Robalino-Mejía, C. & Galván-Magaña, F. & Hernández-Herrera, A. & Jakes-Cota, U. & Villalobos, H. & Moncayo-Estrada, R. & Gayford, J.H. (2025): A Global Synthesis of Population Demographic Models in Sharks and Rays. Fish and Fisheries, in press  https://dx.doi.org/10.1111/faf.12900
Mollier, M. & Derville, S. & Mazé, C. & Virgili, A. & Lerebourg, C. & Prioul, F. & Hamer, P. & Hosken, M. & McKechnie, S. & Tixier, P. (2025): Both environmental conditions and fisher behaviour influence the occurrence of shark and odontocete depredation on the longline catch in New Caledonia. Fisheries Research, 285, Article 107378  https://dx.doi.org/10.1016/j.fishres.2025.107378
Murua, J. & Grande, M. & Moreno, G. & Murua, H. & Cuevas, N. & Ferarios, J.M. & Salgado, A. & Restrepo, V. & Santiago, J. (2025): Codeveloping on deck conservation technology with tropical tuna purse seine fishers to mitigate elasmobranch bycatch. Ices Journal of Marine Science, 82(5), Article fsaf057  https://dx.doi.org/10.1093/icesjms/fsaf057
Mylniczenko, N.D. (2025): Editorial: Advanced veterinary topics in elasmobranchs. Frontiers In Veterinary Science, 12, Article 1600135  https://dx.doi.org/10.3389/fvets.2025.1600135
O'Connell, C.P. & Dodd, J.F. & Crews, J. & Gressle, J. & Racicot, B. & Sitzer, S. & Lis, T. & Skomal, G.B. (2025): A global review of white shark (Carcharodon carcharias) parturition (vol 34, pg 869, 2024). Reviews In Fish Biology and Fisheries, 35(2), 1099–1100  https://dx.doi.org/10.1007/s11160-025-09939-6
Preciado-González, P.A. & Galván-Magaña, F. & Ketchum, J.T. & Villalobos-Ortiz, H. & González-Armas, R. & Higuera-Rivas, J.E. & Ayala-Bocos, A. & Ruffo-Ruffo, P. & Saad-Navarro, G. & Hoyos-Padilla, E.M. (2025): Potential nursery area for the endangered oceanic manta ray in the Gulf of California, México. Environmental Biology of Fishes, in press  https://dx.doi.org/10.1007/s10641-025-01696-6
Prieto, A. & Quintero, A. & Pérez, J.A. & Arriatti, Y.R. (2025): Measurement of lactate as an indicator of stress in Rhizoprionodon longurio and Sphyrna lewini during shark tagging. Ciencias Marinas, 51, Article e3493  https://dx.doi.org/10.7773/cm.y2025.3493
Ralston, N.V.C. & Kaneko, J.J. & Raymond, L.J. (2025): Selenium, Mercury, and Health Benefit Values of Pelagic Ocean Fish of the Central North Pacific. Fishes, 10(4), Article 158  https://dx.doi.org/10.3390/fishes10040158
Reinero, F.R. & Bocchi, F. & Perisic, N. & Crouch, J. & Pacifico, A. & Asshauer, L. & Vicariotto, C. & Micarelli, P. (2025): First insights into social behavioral patterns between pairs of bait-attracted mature female tiger sharks from Fuvahmulah Island, Maldives. Behavioural Processes, 229, Article 105216  https://dx.doi.org/10.1016/j.beproc.2025.105216
Roa, J.N. & Morita, T. & Tresguerres, M. (2025): Coordination between glycogen metabolism and pH regulation in stingray gill cells. Biochemical and Biophysical Research Communications, 765, Article 151851  https://dx.doi.org/10.1016/j.bbrc.2025.151851
Rohner, C.A. & Venables, S.K. & Knochel, A.M. & Rambahiniarison, J.M. & Marillac, V. & Cardon, C. & Scholten, N. & Pierce, S.J. & Kiszka, J.J. (2025): Movements and habitat use of reef manta rays around the Mozambique Channel Island of Mayotte, Southwestern Indian Ocean. Environmental Biology of Fishes, 108(6), 937–955  https://dx.doi.org/10.1007/s10641-025-01695-7
Saunders, R.A. & Ratcliffe, N. & Farrell, E.D. & Clarke, M.W. (2025): Migration and space use by porbeagle sharks Lamna nasus in the northeast Atlantic. Marine Ecology Progress Series, 755, 95–114  https://dx.doi.org/10.3354/meps14786
Skufca, K. & Baeza, J.A. (2025): The Complete Mitochondrial Genome of Squalus cubensis and Comparative Mitogenomics and Phylomitogenomics of the Family Squalidae. Ecology and Evolution, 15(5), Article e71412  https://dx.doi.org/10.1002/ece3.71412
Talwar, B.S. & Semmens, B.X. & Aires-da-Silva, A. & Griffiths, S. & Humberstone, J. & Hutchinson, M. & Lopez, J. & Minte-Vera, C. & Ovando, D. & Román-Verdesoto, M. & Siu, S. & Bellquist, L.F. (2025): Informing the spatial management of Silky Shark (Carcharhinus falciformis) in the Eastern Pacific Ocean. Reviews In Fish Biology and Fisheries, 35(2), 1031–1062  https://dx.doi.org/10.1007/s11160-025-09948-5
Temple, A.J. & Cochran, J.E.M. & Pirog, A. & Dulvy, N.K. & Cortés, E. & Weigmann, S. & Booth, H. & Wheeler, C.R. & Finucci, B. & Haque, A.B. & Heithaus, M.R. & Seidu, I. & Rummer, J.L. & Berumen, M.L. (2025): Opportunities to enhance conservation success for sharks. npj Ocean Sustainability, 4, Article 24  https://dx.doi.org/10.1038/s44183-025-00131-8
Thiel, R. & Winkler, H.M. & Sarrazin, V. & Böttcher, U. & Dänhardt, A. & Dorow, M. & Dureuil, M. & George, M. & Kuhs, V.N. & Oesterwind, D. & Probst, W.N. & Schaarschmidt, T. & Vorberg, R. (2025): Rote Liste und Gesamtartenliste der Fische und Neunaugen (Elasmobranchii, Actinopterygii & Petromyzontida) der marinen Gewässer Deutsch­lands. Naturschutz und Biologische Vielfalt, 170(9), 1–119  https://dx.doi.org/10.19217/rl1709
Wheeler, A.R. & Wells, R.J.D. & Mohan, J.A. & Richards, T. & Jargowsky, M.B. & Falterman, B. & Carlson, J.K. & Drymon, J.M. (2025): Regional differences in reproduction of Blacktip Shark in the northern Gulf of Mexico. Marine and Coastal Fisheries, 17(2), Article vtaf006  https://dx.doi.org/10.1093/mcfafs/vtaf006
White, C.F. & Lauder, G.V. (2025): Are swimming fish dual oscillator systems? A case study using free-swimming smooth dogfish sharks (Mustelus canis). Journal of Experimental Biology, 228(7), Article jeb249715  https://dx.doi.org/10.1242/jeb.249715
Young-Veenstra, S. (2025): No bandage necessary: the healing power of baby sharks. Journal of Experimental Biology, 228(7), Article   https://dx.doi.org/10.1242/jeb.250296
Zampieri, C. & Mazzoldi, C. & Raicevich, S. & Barausse, A. (2025): Individual-based modelling to fine-tune management measures for commercial demersal sharks. Ecological Informatics, 88, Article 103147  https://dx.doi.org/10.1016/j.ecoinf.2025.103147
Zhang, X. & Giusti, A. & Li, S.H. & Deng, W.D. & Sun, Z.Z. & Li, Y. & Peng, H.Y. & Hu, J.J. & Armani, A. & Wen, J. (2025): Beyond mislabelling: Chinese fish balls authentication by metabarcoding allows unveiling hidden mammal and avian species. Food Control, 176, Article 111338  https://dx.doi.org/10.1016/j.foodcont.2025.111338
Zvi-Kedem, T. & Martinez, S. & Shemesh, E. & Lalzar, M. & Guy-Haim, T. & Sisma-Ventura, G. & Makovsky, Y. & Tchernov, D. & Rubin-Blum, M. (2025): Shark eggs contribute to the trophic ecology of a cold-seep chemosynthetic ecosystem. Marine Ecology Progress Series, 756, 71–81  https://dx.doi.org/10.3354/meps14804
 

Extinct Chondrichthyes:
Alexandre, A. & Adnet, S. & Martin, E.J. (2025): Reconstructing the trophic structure of Maastrichtian elasmobranch communities in Morocco using calcium isotopes. Gondwana Research, in press  https://dx.doi.org/10.1016/j.gr.2025.05.021
Artüz, M.L. & Sakinç, M. (2025): Description of a new species, Xiphodolamia maliki sp. nov. and the shark teeth of Middle Eocene (Lutetian) aged Soğucak Formation in Küçükçekmece, Istanbul, Turkey. Zootaxa, 5646(4), 527–544  https://dx.doi.org/10.11646/zootaxa.5646.4.3
Brinkman, D.B. & López, J.A. & Erickson, G.M. & Eberle, J.J. & Muñoz, X. & Wilson, L.N. & Perry, Z.R. & Murray, A.M. & Van Loon, L. & Banerjee, N.R. & Druckenmiller, P.S. (2025): Fishes from the Upper Cretaceous Prince Creek Formation, North Slope of Alaska, and their palaeobiogeographical significance. Papers in Palaeontology, 11, Article e70014  https://dx.doi.org/10.1002/spp2.70014
Demarrez, I. & Mollen, F.H. (2025): De Egemse kleigroeve Ampe, een schatkamer vol historische mariene biodiversiteit. De Roede van Tielt, 56(2), 172–179
Feichtinger, I. & Harzhauser, M. & Pollerspöck, J. & Auer, G. & Ćorić, S. & Kranner, M. & Kallanxhi, M. & Weinmann, A.E. & Guinot, G. (2025): Ecological restructuring of North Tethyan marine vertebrate communities triggered by the end-Cretaceous extinction. Proceedings of the National Academy of Sciences of the United States of America, 122(22), Article e2409366122  https://dx.doi.org/10.1073/pnas.2409366122
Gonçalves, D. & Luccisano, V. & Rebillard, A. & Logghe, A. & Stamberg, S. & Steyer, J.S. (2025): New aquatic vertebrate and ichnological remains from the Upper Carboniferous of Decazeville (Aveyron, France): implications for the paleofauna of the French Variscan basins. Comptes Rendus Palevol, 24(11), Article   https://dx.doi.org/10.5852/cr-palevol2025v24a11
Johns, M.J. & Fischer, J. & Makahnouk, W.R.M. & Nyborg, T. & Deom, E. & Bowen, D. &  Bartlett, R. (2025): First chimaeroid fish egg capsule (Chondrichthyes, Holocephali, Chimaeriformes) from upper Eocene Carmanah Group strata, West Coast of Vancouver Island, British Columbia, Canada. Canadian Journal of Earth Sciences, 62(5), 1013–1042  https://dx.doi.org/10.1139/cjes-2024-0096
Klug, C. & Vogt, S. & Altorfer, K. & Kindlimann, R. & Kocáková, K. & Greif, M. & Pimiento, C. (2025): Zähne von Otodus in der Schweiz und ein Neufund von der Burg Freienstein. Schweizer Strahler, 2025, 26–31
Mann, A. & Nelson, W.J. & Hook, R.W. & Elrick, S.D. (2025): The lost Permo-Carboniferous vertebrate deposit of Horseshoe Bend near Danville, Vermilion County, Illinois. Journal of Paleontology, 98(5), 838–854  https://dx.doi.org/10.1017/jpa.2024.30
McCormack, J. & Feichtinger, I. & Fuller, B.T. & Jaouen, K. & Griffiths, M.L. & Bourgon, N. & Maisch, H. & Becker, M.A. & Pollerspöck, J. & Hampe, O. & Rössner, G.E. & Assemat, A. & Müller, W. Shimada, K. (2025): Miocene marine vertebrate trophic ecology reveals megatooth sharks as opportunistic supercarnivores. Earth and Planetary Science Letters, in press  https://dx.doi.org/10.1016/j.epsl.2025.119392
Salvino, A.M. & Schmiedeler, J.W. & Shimada, K. (2025): Fossil Vertebrates from the Middle of the Graneros Shale (Upper Cretaceous: Middle Cenomanian), Russell County, Kansas, USA. Transactions of the Kansas Academy of Science 128(1-2), 109–124  https://dx.doi.org/10.1660/062.128.0110
Schweigert, G. & Dietl, G. (2025): 30 Jahre wissenschaftliche Grabungen im Nusplinger Plattenkalk –  eine Erfolgsgeschichte [30 years of scientific excavations in the Nusplingen Plattenkalk –  a story of success]. Archaeopteryx, 40, 14–30
 

MISCELLANEOUS:

 --------------------------------------------------------------------------------------------------------------------------------------------------

Megalodon: The broad diet of the megatooth shark

The prehistoric predatory fish Otodus megalodon did not feed solely on other large predatory animals at the top of the food chain -- zinc detected in fossils delivers clues about its other prey

Date: May 26, 2025

Source: Goethe University Frankfurt

Summary: Contrary to widespread assumptions, the largest shark that ever lived -- Otodus megalodon -- fed on marine creatures at various levels of the food pyramid and not just the top. Scientists analyzed the zinc content of a large sample of fossilized megalodon teeth, which had been unearthed above all in Sigmaringen and Passau, and compared them with fossil teeth found elsewhere and the teeth of animals that inhabit our planet today.

--------------------------------------------------------------------------------------------------------------------------------------------------

'Sharkitecture:' A nanoscale look inside a blacktip shark's skeleton

FAU study maps internal structure in unprecedented detail

Date: May 20, 2025

Source: Florida Atlantic University

Summary: Using synchrotron X-ray nanotomography with detailed 3D imaging and in-situ mechanical testing, researchers are peering inside shark skeletons at the nanoscale, revealing a microscopic 'sharkitecture' that helps these ancient apex predators withstand extreme physical demands of constant motion. After hundreds of millions of years of evolution, scientists can now finally see how shark cartilage works at the nanoscale -- and learn from them.

Ecosystem disrupted following the disappearance of Great white sharks

Date: March 25, 2025

Source: University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science

Summary: A new study has uncovered evidence of far-reaching ecosystem consequences following the disappearance of Great white sharks (Carcharodon carcharias) from False Bay, South Africa. The research spans over two decades and documents cascading ecological disruptions, underscoring the crucial role apex predators play in maintaining ocean health.