Tag Archive for 'Chondrichthyes'

Palaeospondylus australis, braincase and histological section. Image credit: Burrow et al., doi: 10.1093/nsr/nwae444.

400-Million-Year-Old Fossils of Enigmatic Jawed Vertebrate Unearthed in Australia

Dec 11, 2024 by Natali Anderson

Palaeospondylus gunni, a small creature with an eel-like body that lived during the Middle Devonian epoch around 390 million years ago, is represented...

Glikmanius careforum. Image credit: Benji Paynose.

Two New Species of Carboniferous Ctenacanth Sharks Identified in the United States

Feb 7, 2024 by News Staff

A focused search for ancient marine vertebrates during a paleontological resource inventory of Mammoth Cave National Park has yielded a wealth of new fossil...

Reconstruction of Maghriboselache mohamezanei in its habitat. Thylacocephalans, cephalopods with orthoconic conchs, placoderms such as Dunkleosteus and osteichthyans populated the water column during the middle Famennian in the Anti-Atlas of Morocco. Image credit: Klug et al., doi: 10.1186/s13358-023-00266-6.

Devonian Shark-Like Fish Had Unique Sensory Specialization

Apr 3, 2023 by Enrico de Lazaro

Paleontologists have described a new genus and species of broad-snouted chondrichthyan fish from several fossilized specimens found in Morocco. Reconstruction...

The great hammerhead shark (Sphyrna mokarran). Image credit: Christopher Vaughn-Jones.

Researchers Sequence Genomes of Two Endangered Shark Species

Jan 5, 2023 by News Staff

Scientists have sequenced the chromosome-level genomes of the great hammerhead (Sphyrna mokarran) and the shortfin mako (Isurus oxyrinchus) sharks. Their...

Galeus arae, a member of the genus Galeus and a relative of the newly-discovered species Galeus friedrichi. Image credit: NOAA Ocean Explorer.

New Species of Sawtail Catshark Discovered in Philippines

Nov 29, 2022 by Natali Anderson

Named Galeus friedrichi, the new species is the third species of the catshark genus Galeus — after Galeus sauteri and Galeus schultzi — documented...

Life restoration of Petalodus sharks. Image credit: Dinghua Yang.

Permian-Period Shark Had Petal-Shaped Teeth

Sep 3, 2021 by Enrico de Lazaro

Paleontologists have uncovered seven well-preserved teeth from the extinct shark genus Petalodus in Shanxi province, China. Life restoration of Petalodus...

Ferromirum oukherbouchi reconstructed in association with invertebrates (orthocerid cephalopods and thylacocephalans) from the Devonian of Maider region, Morocco. Image credit: Frey et al., doi: 10.1038/s42003-020-01394-2.

Devonian-Period Shark Had Large Eyes and Unique Jaws

Nov 20, 2020 by Enrico de Lazaro

Paleontologists in Morocco have found fossil fragments from a previously undescribed genus and species of symmoriiform shark that lived during the Late...

Dermal denticles on the tail of the little skate (Leucoraja erinacea). Image credit: Andrew Gillis, University of Cambridge.

Vertebrate Teeth Evolved from Ancient Fish Scales, Researchers Say

Nov 22, 2017 by News Staff

New findings from researchers at the University of Cambridge, UK, support the theory that teeth in the animal kingdom evolved from the jagged scales of...