Results 21 to 30 of about 1,230 (177)
Natural History Sciences, 2023 A remarkable, complete specimen of a squalorajid holocephalian is described for the first time from the Lower Jurassic (lower Sinemurian) rocks of Osteno (Como, NW Italy).
Christopher J. Duffin +2 more
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Eocene squalomorph sharks (Chondrichthyes, Elasmobranchii) from Antarctica [PDF]
Journal of South American Earth Sciences, 2017 Rare remains of predominantly deep-water sharks of the families Hexanchidae, Squalidae, Dalatiidae, Centrophoridae, and Squatinidae are described from the Eocene La Meseta Formation, Seymour Island, Antarctic Peninsula, which has yielded the most abundant chondrichthyan assemblage from the Southern Hemisphere to date.
Andrea Engelbrecht +3 more
openaire +3 more sources
Frontiers in Neuroscience, 2018 The neuropeptide gonadotropin-releasing hormone (GnRH) plays an important role in the control of reproductive functions. Vertebrates possess multiple GnRH forms that are classified into three main groups, namely GnRH1, GnRH2, and GnRH3.
Anne-Laure Gaillard +9 more
doaj +1 more source
Mineralization of the Callorhinchus Vertebral Column (Holocephali; Chondrichthyes)
Frontiers in Genetics, 2020 Members of the Chondrichthyes (Elasmobranchii and Holocephali) are distinguished by their largely cartilaginous endoskeletons, which comprise an uncalcified core overlain by a mineralized layer; in the Elasmobranchii (sharks, skates, rays) most of this ...
Jacob B. Pears +4 more
doaj +1 more source
Biodiversitas Journal of Biological Diversity, 1970 Sutarno, Setyawan AD, Suyatna I. 2012. Species diversity of critically endangered pristid sawfishes (Elasmobranchii: Pristidae) Elasmobranchii: Pristidae (Malay Archipelago). Biodiversitas 13: 161-171. The pristid sawfishes (Pristidae) are notable because of their sawlike rostrum and large body size (up to seven meters).
SUTARNO SUTARNO +2 more
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Acta Palaeontologica PolonicaThe extinct elasmobranch Protospinax is an intriguing shark known mostly from isolated teeth and rare complete skeletons. Most previous studies focused on differences in isolated teeth for taxonomic assignments, with little to no considerations of dental
Arnaud Begat +5 more
doaj +1 more source
Fish remains from Miocene beds of Višnja vas near Vojnik, Slovenia
Geologija, 2013 This paper discusses fossil teeth of sharks (Elasmobranchii, Neoselachii) and porgies (Teleostei, Sparidae) fromthe Miocene glauconite sandstones of Vi{nja vas near Vojnik.
Aleš Šoster, Vasja MIkuž
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Beneath the surface: DNA barcoding of shark fins in Singapore
Royal Society Open ScienceThe global decline of shark populations, largely driven by overfishing to supply the shark fin trade, poses a significant threat to marine ecosystems. Southeast Asia, and particularly Singapore, is a key hub for the transit and trade of shark fins that ...
Manisha Saigal +11 more
doaj +1 more source
Revista Mexicana de Biodiversidad, 2017 Three individuals of Multicalyx cristata (Aspidocotylea) were identified in the gallbladder of a hammerhead shark, Sphyrna lewini (Elasmobranchii), in Playa Chachalacas, Veracruz, Mexico. This report makes a significant contribution to our understanding
Oscar Méndez +1 more
doaj +1 more source
Food and feeding habits of the blackspotted smooth-hound, Mustelus punctulatus (Elasmobranchii: Carcharhiniformes: Triakidae), from the northern Adriatic [PDF]
Acta Ichthyologica et Piscatoria, 2011 Background. The blackspotted smooth-hound, Mustelus punctulatus Risso, 1826, has been regularly caught in the northern Adriatic Sea, although a decreasing trend in its catches was observed off the coast of Slovenia within the last decade The knowledge of
L. Lipej +4 more
doaj +3 more sources