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The largest prehistoric horse was Equus giganteus of North America. It was estimated to grow to more than 1,250 kg (1.38 short tons) and 2 m (6 ft 7 in) at the shoulders. [138] The largest anchitherine equid was Hypohippus at 403 to 600 kg (888 to 1,323 lb), comparable to large modern domestic horses.
Archelon is an extinct marine turtle from the Late Cretaceous, and is the largest turtle ever to have been documented, with the biggest specimen measuring 4.6 m (15 ft) from head to tail and 2.2–3.2 t (2.4–3.5 short tons) in body mass.
Print/export Download as PDF; ... List of prehistoric sea cucumbers; ... Largest prehistoric animals; List of Ediacaran genera;
Basilosaurus is thought to have been one of the largest animals of the Paleogene, with the type species B. cetoides measuring around 17–20 metres (56–66 ft) long and weighing up to 15 metric tons (17 short tons). It was the top predator of its environment in the shallows of the inland sea, preying on sharks, large fish and other marine mammals.
The animal's affinity for shallow waters is congruent with the interpretation that basilosaurids preferred coastal waters, rather than living in the open ocean. [1] While the fragmentary nature of this animal renders precise statements on its locomotion uncertain, some suggestions have been made. The elongated centra of the vertebrae for ...
The skull of a pliosaur, a prehistoric sea monster, was discovered on a beach in Dorset, England, and it could reveal secrets about these awe-inspiring creatures. ... Animals. Business. Elections.
A fossil reveals how a now-extinct species of dugong was swimming in the sea about 15 million years ago when it was preyed upon by a crocodile and a tiger shark.
Livyatan is the largest fossil sperm whale discovered, and was also one of the biggest-known predators, having the largest bite of any tetrapod. [ 1 ] [ 8 ] Diagram comparing the upper and lower size estimates of Livyatan (bottom three) with the size of mature sperm whales, including one of the largest individuals recorded (top three), and a human