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Analysis of the newly identified ancient dolphin’s skull told paleontologists that its body would have measured at least 11 feet (3.5 meters) long — making it about 20% to 25% bigger than ...
Thanks to data collected by these apex predators, researchers revealed the world’s largest known seagrass ecosystem, which covers an area of about 35,000 square miles (92,000 square kilometers ...
Many of these genera possessed streamlined, dolphin-like thunniform bodies, although more basal clades like Eurhinosauria, which include Leptonectes and Eurhinosaurus, had longer bodies and long snouts. Few ichthyosaur fossils are known from the Middle Jurassic. This might be a result of the poor fossil record in general of this epoch. The ...
A massive jawbone found by a father-daughter fossil-collecting duo on a beach in Somerset along the English coast belonged to a newfound species that’s likely the largest known marine reptile to ...
This list currently includes only fossil genera and species. However, the Atlantic population of gray whales (Eschrichtius robustus) became extinct in the 18th century, and the baiji (or Chinese river dolphin, Lipotes vexillifer) was declared "functionally extinct" after an expedition in late 2006 failed to find any in the Yangtze River.
Miodelphinus is an extinct genus of platanistoid dolphin that lived during the Miocene epoch, about 18.7–18.5 million years ago. Its fossil, which was found in 1991 at Haze Formation (Japan) and described as a new genus in 2024, consists of a portion of its skull, hyoid bones, and ribs. The preserved part of the skull is 30 cm long with 4 cm ...
A fossil jawbone found by a British girl and her father on a beach in Somerset, England belongs to a gigantic marine reptile dating to 202 million years ago that appears to have been among the ...
Pebanista is an extinct genus of platanistid "river dolphin" that lived during the Early to Middle Miocene in Peru.As a member of the Platanistidae, Pebanista is most closely related to the extant Ganges and Indus river dolphins (Platanista) of South Asia and shares no close relation to the modern Amazon river dolphin (Inia geoffrensis) that inhabits the same region today.