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Andrewsarchus (/ ˌ æ n d r uː ˈ s ɑːr k ə s /), meaning "Andrews' ruler", is an extinct genus of artiodactyl that lived during the Middle Eocene in what is now China. The genus was first described by Henry Fairfield Osborn in 1924 with the type species A. mongoliensis based on a largely complete cranium.
Duerotherium is an extinct genus of artiodactyl that lived during the Middle Eocene and is only known from the Iberian Peninsula.The genus is a member of the family Anoplotheriidae and the subfamily Anoplotheriinae, and contains one species, D. sudrei.
Anoplotherium commune skull, National Museum of Natural History, France. The research history of Anoplotherium spans back to 1804 when Georges Cuvier first described the fossils of this extinct artiodactyl and named the genus after describing Palaeotherium, making it one of the first fossil mammal genera to be described as well as having one of the earliest official taxonomic authorities.
Painting from around 1920 Modern restoration of Merycoidodon culbertsoni. Merycoidodon would have somewhat resembled a pig in appearance, but had a longer body, at about 1.4 metres (4.6 ft), and short limbs.
Size comparison between E. deguilhemi and a human. Entelodon was a fairly typical entelodont, with a large, bulky body, slender legs, and a long snout. [3] [1] [4] [5]Like other entelodonts, Entelodon had complete eutherian dentition (3 incisors, 1 canine, 3 premolars, and 3 molars per quadrant).
Robiatherium is an extinct genus of Palaeogene artiodactyls containing one species R. cournovense.The genus name derives from the locality of Robiac in France where some of its fossil were described plus the Greek θήρ / therium meaning "beast" or "wild animal".
Anthracotherium (from Ancient Greek ἄνθραξ, anthrax, meaning "coal", and θηρίον, therium, meaning "beast") [3] is an extinct genus of artiodactyls characterized by having 44 teeth, with five semi-crescentic cusps on the crowns of the upper molars.
The event led to the extinction of 60% of western European mammalian lineages, which were subsequently replaced by Asian immigrants. [ 106 ] [ 107 ] [ 108 ] The Grande Coupure is often dated directly to the Eocene-Oligocene boundary at 33.9 Ma, although some estimate that the event began slightly later, at 33.6–33.4 mya.