In a study published today in the journal Earth and Planetary Science Letters, paleontologists analyzed the ratio of two different zinc isotopes in the...
Paleontologists have identified a new genus and species of obruchevodid petalodont (petal-toothed) shark from multiple teeth unearthed at Mammoth Cave...
The megatooth shark, Otodus megalodon, is an iconic shark represented primarily by its gigantic teeth in the Neogene fossil record, but the lack of well-preserved...
Palaeospondylus gunni, a small creature with an eel-like body that lived during the Middle Devonian epoch around 390 million years ago, is represented...
A team of marine biologists led by a Florida International University researcher has described a new species of the shark genus Sphyrna from the Caribbean...
Paleontologists have unearthed a 20-million-year-old fossilized skeleton of a species of the dugongid sirenian mammal Culebratherium with shark and crocodylian...
Paleontologists in Japan have described a new species of shark-like cartilaginous fish based on the fossilized teeth from the Late Triassic Momonoki Formation.
The...
A team of paleontologists from California State Polytechnic University and elsewhere has described a new genus and species of shark-like fish from the...
Paleontologists have described a new species of the extinct lamniform shark genus Palaeohypotodus based on 17 fossilized teeth found in Alabama, the United...
A focused search for ancient marine vertebrates during a paleontological resource inventory of Mammoth Cave National Park has yielded a wealth of new fossil...
The megatooth shark, Otodus megalodon, which likely reached at least 15 m in total length, is an iconic extinct shark represented primarily by its gigantic...
Sharks occupy diverse ecological niches and play critical roles in marine ecosystems, often acting as apex predators. They are considered a slow-evolving...
A new genus and species of petalodont (petal-toothed) shark has been identified from fossilized teeth found in cave passages of Mammoth Cave National Park...
Marine biologists have described a new species of the shark genus Heterodontus from northwestern Australia based on six whole specimens and a single egg...
Few fast-swimming apex fishes are classified as regional endotherms, or partially warm-blooded, having evolved a relatively uncommon suite of traits (e.g....
Otodus megalodon, a megatooth shark that lived between 23 and 3.6 million years ago, was not a fast swimmer, but it had a mega-appetite explaining its...
Otodus megalodon was a gigantic megatooth shark that lived in the world’s oceans from 23 to 3.6 million years ago. It could grow to the enormous size...
Paleontologists have described a new genus and species of broad-snouted chondrichthyan fish from several fossilized specimens found in Morocco.
Reconstruction...
Paleontologists from the University of Vienna and elsewhere have revised a controversial species of the elasmobranch Protospinax annectans based on new...
Scientists have sequenced the chromosome-level genomes of the great hammerhead (Sphyrna mokarran) and the shortfin mako (Isurus oxyrinchus) sharks. Their...
