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Rio Do Rasto Formation
The Rio do Rasto Formation is a Late Permian sedimentary geological formation in the South Region of Brazil. The official name is Rio do Rasto, although in some publications it appears as ''Rio do Rastro''. Geography It is found mainly in the Brazilian states of Santa Catarina, Paraná, and Rio Grande do Sul. It was formed during the Late Permian epoch of the Permian period. Fossil content The following fossils have been uncovered from the formation:Langer et al., 2008, p.1 * Flora ** '' Schizoneura'' ** ''Glossopteris'' ** '' Paracalamites'' ** ''Pecopteris'' * Bivalves ** '' Leinzia'' ** '' Palaeomutela'' ** '' Terraia'' * Gastropods ** '' Pseudestheria'' ** '' Monoleiolophus'' ** '' Euestheria'' ** '' Asmussia'' ** '' Liograpta'' * Dicynodonts ** ''Endothiodon'' ** '' Rastodon procurvidens''Boos et al., 2016, p.4 * Amphibians ** '' Australerpeton cosgriffi'' ** '' Bageherpeton longignathus'' ** '' Konzhukovia sangabrielensis'' ** '' Parapytanga catarinensis'' ** '' Rasto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rastodon
''Rastodon'' is an extinct genus of anomodonts. It is the oldest and most basal known genus of bidentalian dicynodonts. Uniquely among dicynodonts, its tusks curve forward. The type and only species is ''R. procurvidens''. Etymology ''Rastodon'' is derived from the Rio do Rasto Formation, where its remains were found, and the Greek word for "tooth". The species name, ''R. procurvidens'', means "curved forward tooth" and describes its uniquely shaped teeth. Provenance Only a single specimen of ''Rastodon'' has been discovered so far. It comes from the Rio do Rasto Formation, of the Guadalupian of Brazil. Description ''Rastodon'' is a fairly typical dicynodont. It bore a beaked head with a single pair of tusks and a keratin-covered nasal boss. However, it does possess several distinctive traits, of which its anteriorly-curved tusks are the most distinctive. Furthermore, its skull is relatively long and shallow compared to its close relatives. Its tusks contacted the lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endothiodon
''Endothiodon'' (/ɛndoʊθiːoʊdɔːn/ "inner tooth" from Greek endothi (ἔνδοθῐ), "within", and odon (ὀδών), "tooth", most likely named for the characteristic of the teeth being placed internally to the maxillaBoos A. S., Schultz C. L., Vega C. S., Aumond J. J. "On the presence of the Late Permian dicynodont ''Endothiodon'' in Brazil" Palaeontology 56:4, 837-848 (2013)) is an extinct genus of large dicynodont from the Late Permian. Like other dicynodonts, ''Endothiodon'' was an herbivore, but it lacked the two tusks that characterized most other dicynodonts. The anterior portion of the upper and lower jaw are curved upward, creating a distinct beak that is thought to have allowed them to be specialized grazers.Latimer E. M., Gow C. E., Rubidge B. S. "Dentition and feeding niche of ''Endothiodon'' (Synapsida;Anomodontia)" Palaeontologia Africana 32, 75-82 (1995) ''Endothiodon'' was widespread and is found across the southern region of what was then a single large co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
