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The biggest odobenid and one of the biggest pinnipeds to have ever existed is Pontolis magnus, with a skull length of 60 cm (24 in) (twice as large as the skulls of modern male walruses) [159] and having a total body length of more than 4 m (13 ft). [160] [161] Only the modern male elephant seals reach similar sizes. [160]
With an estimated length of 33.9 cm (13.3 in) based on the assumption that the fossil was that of a spider, and with a leg-span estimated to be 50 centimetres (20 in), Megarachne servinei would have been the largest spider to have ever existed; exceeding the goliath birdeater (Theraphosa blondi), which has a maximum leg-span of around 30 cm (12 ...
This is a list of the largest rodents. Rank Common name Scientific name Status Maximum body mass [kg (lb)] Image Notes 1: Giant pacarana: Josephoartigasia monesi:
A Mesozoic reptile is believed to have been the largest flying animal that ever existed: the pterosaur Quetzalcoatlus northropi, from North America during the late Cretaceous. This species is believed to have weighed up to 126 kg (278 lb), measured 7.9 m (26 ft) in total length (including a neck length of over 3 m (9.8 ft)) and measured up to ...
Josephoartigasia is a member of the family Dinomyidae, a group of hystricognath rodents native to South America, most commonly identified in Argentina, Colombia, Venezuela, and Uruguay. The only living member is the pacarana , one of the largest living rodents at 15 kg (33 lb).
Animals described as pachyderms, clockwise from top left: a hippopotamus, a rhinoceros, a tapir, and an elephant Pachydermata (meaning 'thick skin', from the Greek παχύς , pachys , 'thick', and δέρμα , derma , 'skin') is an obsolete order of mammals described by Gottlieb Storr , Georges Cuvier , and others, at one time recognized by ...
Mosasaurus hoffmanni was the largest squamate lizard to have ever lived, with a length of 11 meters (36 ft) and a body mass of 10 metric tons (11 short tons) [90] However, the largest reptiles, period, were the shastasaurids, specifically Ichthyotitan, which approached lengths rivalling to exceeding those of a blue whale, at around 26–35 m ...
Paraceratherium is one of the largest known land mammals that have ever existed, but its precise size is unclear because of the lack of complete specimens. [4] Its total body length was estimated as 8.7 m (28.5 ft) from front to back by Granger and Gregory in 1936, and 7.4 m (24.3 ft) by the palaeontologist Vera Gromova in 1959, [ 33 ] but the ...