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Colbertia
''Colbertia'' is an extinct genus of Oldfieldthomasiidae, oldfieldthomasiid notoungulate. It lived from the Early to the Middle Eocene, and its fossilized remains were discovered in Argentina and Brazil. Description This animal was roughly the size of a Virginia opossum, reaching approximately 50 centimeters in length excluding its tail. Its weight has been estimated to have been around 2 to 3 kilograms. ''Colbertia'' had a relatively elongated skull, with low-crowned (brachydont) molars ; the cusps of the molars were joined to form ridge-like structures called lophs, and are therefore considered lophodont. The paracone and the metacone had notable folds. The ankle bones of ''Colbertia'' indicates that it was a plantigrade, an ancestral condition within Notoungulata. The bone morphology at the base of the skull was very similar to other basal Notoungulates, although the petrous bone had distinct characteristics also found in similar but slightly more recent notoungulates, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Itaboraian
The Itaboraian () age is a period within the Early Eocene geologic time (53.0–50.0 Ma) epoch of the Paleogene, used more specifically with South American land mammal ages (SALMA). It follows the Riochican and precedes the Casamayoran age. Etymology This age is named after the Itaboraí Formation in the Itaboraí Basin in Itaboraí, a Greater Rio municipality in the state of Rio de Janeiro in Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ... not very far away from Niterói. Formations Fossils Correlations References Bibliography ;Itaboraí Formation * * * * * * ;Bogotá Formation * * * ;Cerrejón Formation * * * * * * * * * * * * * ;Chota Formation * * ;Las Flores Formation * * * ;Koluel Kaike Formation * ;Ma� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
