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Neoaetosauroides : ウィキペディア英語版
Neoaetosauroides

''Neoaetosauroides'' is an extinct genus of primitive aetosaur. Its type and only species is ''N. engaeus''. Fossils have been found from the Los Colorados Formation outcropping along the Sierra Morada River in La Rioja, Argentina, and date back to the Norian age of the Late Triassic. It was the first aetosaur known from the formation, with remains being discovered in the 1960s.〔Bonaparte, J. F. (1969). Los tetrápodos triásicos de Argentina. ''1º International Symposium of Gondwana'' (Mar del Plata, 1967):307-325.〕〔Bonaparte, J. F. (1971). Los tetrápodos del sector superior de la Formación Los Colorados, La Rioja, Argentina (Triásico Superior). ''Opera Lilloana'' 22:87-102.〕〔Bonaparte, J. F. (1978). El Mesozoico de América del Sur y sus tetrápodos. ''Opera Lilloana'', 26, 596 pp.〕
==Description==

The genus is one of the most well represented aetosaurs from South America, with some specimens being fully articulated. Two rows of dorsal osteoderms run paramedially along either side of the spine. Ventral osteoderms were also present. Unlike most other aetosaurs, the fourth finger was longer than the second and third. Additionally, the number of phalanges in the fifth digit was lower than other aetosaurs.〔Desojo, J. B. and Báez, A. M. (2005). El esqueleto postcraneano de ''Neoaetosauroides'' (Archosauria: Aetosauria) del Triásico Superior del centro-oeste de Argentina. ''Ameghiniana'' 42(1):115-126.〕 The upper tooth row of ''Neoaetosauroides'' runs anteriorly to the tip of the elongated snout, evidence that is incompatible with the theory of a keratinous beak proposed for other aetosaurs.〔Desojo, J. B. and Báez, A. M. (2007). Cranial morphology of the Late Triassic South American archosaur ''Neoaetosauroides engaeus'': evidence for aetosaurian diversity. ''Palaeontology'' 50(1):267-276.〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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