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A newly identified ancient skull found in ... long — making it about 20% to 25% bigger than modern river dolphins and the biggest known freshwater dolphin. ... Researchers discovered the ...
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 ...
Some fossil vertebrae have been found. The most notable example is a partially preserved vertebral column of a single specimen, excavated in the Antwerp Basin , Belgium, in 1926. It comprises 150 vertebral centra , with the centra ranging from 55 millimeters (2.2 in) to 155 millimeters (6 in) in diameter.
Researchers at the University of Zurich estimated that the 16-million-year-old fossil was more than 11 feet long and is said to be the longest freshwater dolphin ever found.
The extinct Hippopotamus gorgops is the most massive of the fossil even-toed ungulates. The largest known land-dwelling artiodactyl was Hippopotamus gorgops with a length of 4.3 m (14 ft), a height of 2.1 m (6 ft 11 in), and a weight of 5 t (11,000 lb), [67] with its closely related European descendant, Hippopotamus antiquus, rivaling it ...
The newly identified dolphin species lived in a freshwater lake in the Peruvian Amazon 16 million years ago. And the creature measured about 11 feet (3.2 meters) long, making it twice the size of ...
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.
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 ...