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Rosendo Pascuali
''Rosendo'' is an extinct genus of notohippid notoungulates that lived during the Early Oligocene in what is now Argentina and Chile. Fossils of this genus have been found in the Sarmiento Formation and the Abanico Formations of Argentina and Chile. Description ''Rosendo'' was approximately the size of a goat, albeit with a more robust build. It had a heavy and sturdy skull, with a relatively short muzzle. The dentition was characterized by high-crowned (hypsodont) incisors, posterior premolars and molars. The teeth didn't have cementum. The upper incisors were slightly protruding forward. The third upper incisor was wider than the other two, while the fourth premolar was more molariform than the other premolars, but devoid of a distinct hypocone. The upper molars had hypocones, with a variable but generally deep fissure separating them from the protocones. The fissure was blocked by the medial projection of a hooked structure. Apart from the permanent major fossa, the other fos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligocene
The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the exact dates of the start and end of the epoch are slightly uncertain. The name Oligocene was coined in 1854 by the German paleontologist Heinrich Ernst Beyrich from his studies of marine beds in Belgium and Germany. The name comes from the Ancient Greek (''olígos'', "few") and (''kainós'', "new"), and refers to the sparsity of extant forms of molluscs. The Oligocene is preceded by the Eocene Epoch and is followed by the Miocene Epoch. The Oligocene is the third and final epoch of the Paleogene Period. The Oligocene is often considered an important time of transition, a link between the archaic world of the tropical Eocene and the more modern ecosystems of the Miocene. Major changes during the Oligocene included a global expansion o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cenozoic
The Cenozoic ( ; ) is Earth's current geological era, representing the last 66million years of Earth's history. It is characterised by the dominance of mammals, birds and flowering plants, a cooling and drying climate, and the current configuration of continents. It is the latest of three geological eras since complex life evolved, preceded by the Mesozoic and Paleozoic. It started with the Cretaceous–Paleogene extinction event, when many species, including the non-avian dinosaurs, became extinct in an event attributed by most experts to the impact of a large asteroid or other celestial body, the Chicxulub impactor. The Cenozoic is also known as the Age of Mammals because the terrestrial animals that dominated both hemispheres were mammalsthe eutherians (placentals) in the northern hemisphere and the metatherians (marsupials, now mainly restricted to Australia) in the southern hemisphere. The extinction of many groups allowed mammals and birds to greatly diversify so that l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homalodotheriidae
Homalodotheriidae is an extinct family comprising four genera of notoungulate mammals known from the Late Eocene (Tinguirirican) through Late Miocene (Chasicoan) of Argentina and Chile in South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe ....McKenna, Malcolm C., and Bell, Susan K. 1997. ''Classification of Mammals Above the Species Level.'' Columbia University Press, New York, 631 pp. References Toxodonts Eocene mammals Oligocene mammals Miocene mammals of South America Eocene first appearances Miocene extinctions Prehistoric mammal families {{paleo-mammal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pampatemnus
''Pampatemnus'' is an extinct genus of notoungulate belonging to the family Isotemnidae that lived during the Early to Middle Eocene of what is now Argentina. Etymology The genus name, ''Pampatemnus'', is composed of the prefix ''Pampa-'', the Quechua word for "plain", and the suffix ''-temnus'', from the greek word ''Τεμγυς'', meaning "groove", a suffix commonly used by Florentino Ameghino to name genera of Isotemnidae. Description ''Pampatemnus'' was discovered in outcrops of the Lumbrera Formation, an Eocene geological formation located in the Guachipas Department of the Salta Province. Two species attributed to the genus have been described : ''Pampatemnus infernalis'' and ''Pampatemnus deuterus''. The species name ''infernalis'' was given to honor the Legion Infernal, a gaucho regiment who took an important role in the Spanish American wars of independence The Spanish American wars of independence (25 September 1808 – 29 September 1833; es, Guerras de inde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puelia (mammal)
''Puelia'' is a genus of African grasses, the only genus in the tribe Atractocarpeae (syn. Puelieae). It belongs to the subfamily Puelioideae, one of the early-diverging lineages in the grasses, but used to be considered a bamboo genus. ; Species * ''Puelia ciliata'' Franch. - Cameroon, Republic of Congo, Gabon, São Tomé, Bioko * ''Puelia coriacea'' Clayton - Zaïre * ''Puelia dewevrei'' De Wild. & T.Durand - Zaïre, Republic of Congo, Gabon * ''Puelia olyriformis'' (Franch.) Clayton - Liberia, Senegal, Sierra Leone, Republic of Congo, Gabon, Tanzania * ''Puelia schumanniana'' Pilg. - Cameroon ; formerly included see ''Guaduella'' * ''Puelia guluensis - Guaduella macrostachys ''Guaduella'' is a genus of African plants in the grass family, the only genus in the tribe Guaduelleae. It belongs to the subfamily Puelioideae, one of the early-diverging lineages in the grasses, but used to be included in the bamboos. ;Speci ...'' References External links * Poaceae g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomashuxleya
''Thomashuxleya'' is an extinct genus of notoungulate mammal, named after famous 19th-century biologist Thomas Huxley. Description ''Thomashuxleya'' was about in length and weighted an estimated , with a heavy body and strong limbs.D. Patterson, Bruce (€2012) ''Bones, Clones, and Biomes: The History and Geography of Recent Neotropical Mammals'' p.83 Its large skull had 44 teeth in its jaws, including large canines which may have been used to dig around in earth. It had four toes on each foot, and probably walked somewhat like a modern peccary. It was a relatively generalised animal, not specialised for any particular way of life. There's an almost complete skeleton of this animal in exhibition in the American Museum of Natural History. This skeleton was discovered during the Scarrit expedition to Patagonia, Argentina, that was led by the paleontologist George Gaylord Simpson. Fossils of ''Thomashuxleya'' have been found in the Sarmiento and Casamayor Formations of Argentina. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Periphragnis
''Periphragnis'' is an extinct genus of isotemnid notoungulates that lived from the Middle Eocene to the Early Oligocene in what is now Argentina and Chile. Description This animal was of robust build, with powerful, probably digitigrade legs ending in hooves. The forelegs, particularly robust, shared similarities with those of its relative ''Thomashuxleya'', but had less flattened ungulate phalanges. ''Periphragnis'' was approximately one meter and a half long, around the size of a modern boar. Its skull had a small neurocranium, and the dentition was complete and almost without any diastema. The canines were large-sized. ''Periphragnis'' had multiple similarities with ''Thomashuxleya'', but its teeth had a slightly higher crown, although still brachydont. The parastyle and paracon folds in the upper molars were less prominent, as well as less distinctly separated ; the folds of the parastyle, in the upper teeth of the jugal area, intersected with the labial metastyle of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurostylodon
''Pleurostylodon'' is an extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ... genus of Notoungulata, notoungulate belonging to the family Isotemnidae. It lived during the Middle Eocene, in what is now Argentina. Description This genus is known from numerous remains, mainly cranial, allowing to reconstruct its morphology. It was approximately the size of a sheep, with an appearance evocating a tapir or a boar. ''Pleurostylodon'' had a large skull, widening in the orbital arch area, and narrowing in the posterior area of the muzzle, whose terminal part was enlarged and had small incisors ; there was no diastema after the canines. The muzzle was shorter than in more derived and specialized toxodonts such as ''Adinotherium'', and the occipital area was narrower. Several characte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
