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Typotheres
Notoungulata is an extinct order of ungulates that inhabited South America from the early Paleocene to the end of the Pleistocene, living from approximately 61 million to 11,000 years ago. Notoungulates were morphologically diverse, with forms resembling animals as disparate as rabbits and rhinoceroses. Notoungulata are the largest group of South American native ungulates, with over 150 genera in 14 families having been described, divided into two major subgroupings, Typotheria and Toxodontia. Notoungulates first diversified during the Eocene. Their diversity declined from the late Neogene onwards, with only the large Toxodontidae, toxodontids persisting until the end of the Pleistocene (with ''Mixotoxodon'' expanding into Central America and southern North America), perishing as part of the Late Pleistocene extinctions, Late Pleistocene megafauna extinctions along with most other large mammals across the Americas. Collagen sequence analysis suggests that notoungulates are closely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prosotherium
''Prosotherium'' is an extinct genus of late Oligocene Hegetotheriidae, hegetotheriid notoungulate. It has been found in two Argentina, Argentinian fossil formations, ie, the Sarmiento Formation in Chubut Province, and the Agua de la Piedra Formation in Mendoza Province. Description This animal was similar to rabbits, in aspect and in size. Compared to its relatives, it would have been about 20% larger than ''Propachyrucos'', ''Pachyrukhos, Pachrukhos'', and ''Paedotherium'', but slightly smaller than ''Medistylus, Medistyllus''. Its hind legs were particularly long. Crania Its skull was light and thin, notably in the posterior part. The tympanic part of the temporal bone was particularly developed, even more than its relative ''Pachyrukhos'', and it is probable that its auricle (anatomy), auricle was quite large, similar to the ears of a hare. The maxilla and the mandible were high and deep ; the mandible had a subtle coronoid process. The teeth were characterized by incisor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |