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Proterotherium
''Proterotherium'' (meaning "first beast") is an extinct genus of litoptern mammal of the family Proterotheriidae that lived during the Late Miocene of Argentina and Chile. Fossils of this genus have been found in the Ituzaingó Formation of Argentina, and the Galera Formation of Chile. Classification The genus ''Proterotherium'' was first described by Florentino Ameghino in 1883, on the basis of fossil remains found in Upper Miocene deposits in Patagonia. The type species is ''Proterotherium cervioides''. Numerous other species have been ascribed to this genus, many of which come from lower-middle Miocene deposits, such as ''P. americanum'', ''P. australe'', ''P. brachygnathum'', ''P. cavum'', ''P. cingulatum'', ''P. curtidens'', ''P. dichotomum'' , ''P. divortium'', ''P. gradatum'', ''P. intermedium'', ''P. karaikense'', ''P. mixtum'', ''P. nitens'', ''P. perpolitum'', ''P. politum'', ''P. main'', and ''P. pyramidatum''. However, many of these species are now considered to b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetramerorhinus
''Tetramerorhinus'' is an extinct genus of proterotheriid litoptern that lived during the Early and Middle Miocene in what is now Argentina and Peru. Description This animal resembled a small horse, with slender, elongated legs. The body was approximately a meter long, and it is supposed to have weighed between 30 to 50 kilograms. The skull had a relatively elongated snout, with nasal bones longer than ''Diadiaphorus'' and with less developed upper incisors. The orbits were positioned near the middle of the skull. The molars had lower crowns than those of more derived proterotheriids, such as ''Proterotherium''. The endocranial cast of a specimen of ''Tetramerorhinus lucarius'' has been preserved, which allowed to reconstruct certain structures of the animal's brain. The brain was quite large relatively to the size of the skull, due to the development, especially in the anterior part, of the neocortex, and to the complexity of the cerebellum. The olfactory lobes were small and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huayquerian
The Huayquerian ( es, Huayqueriense) age is a period of geologic time (9.0–6.8 Ma) within the Late Miocene epoch of the Neogene, used more specifically within the SALMA classification. It follows the Mayoan and precedes the Montehermosan age. Etymology The age is named after the Huayquerías Formation The Huayquerías Formation ( es, Formación Huayquerías) is a Late Miocene fossiliferous geological formation of the Frontal Cordillera and Cuyo Basin of Argentina. The formation crops out in the central Mendoza Province. The formation, with a m ... in the western Cuyo Basin of northwestern Argentina that was later dated to the Montehermosan. The most complete Huayquerian fauna is found in the Cerro Azul Formation, in Buenos Aires Province also referred to as Epecuén Formation. Formations Fossil content Correlations Notes and references Notes References Bibliography ;Huayquerías Formation * * ;Andalhuala Formation * ;Camacho Formation * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anisolophus Minusculus
''Anisolophus'' is an extinct genus of proterotheriid from the Early to Middle Miocene of Argentina. The genus was named by Burmeister in 1885 to accommodate the species ''Anchitherium australe'', which they had named earlier in 1879. Soria then referred the species ''Licaphrium floweri'' and ''Anisolophus minisculus'' to the genus, making ''Licaphrium'', named in 1887 by Florentino Ameghino, a junior synonym of the genus. Both ''A. australis'' and ''A. floweri'' are known from the Santacrucian age Santa Cruz Formation, while ''A. minisculus'' is known from the Collón Curá Formation. ''Anisolophus'' is considered the senior synonym of the genus ''Licaphrium'', which was named in 1887 by Ameghino for the species ''L. floweri'', now ''A. floweri''. Many other species of ''Licaphrium'' were named, many of which are considered synonyms of ''A. floweri'', ''Tetramerorhinus'', ''Neobrachytherium'', or ''Lophogonodon'', as well as the dubious ''Licaphrium debile'', ''L. arenarum'', '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
