Proterochampsia: an endemic archosauriform clade from South America
Proterochampsia: an endemic archosauriform clade from South America
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Proterochampsia：南美洲特有的主龙科分支
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Tiago Raugust
中科院分区：
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作者：
M. J. Trotteyn;A. Arcucci;Tiago Raugust
摘要原鳄龙类是一个单系群，分布于南美洲中三叠世晚期和晚三叠世早期，是鳄类主龙形目的一个特有类群，被认为是冠群主龙类的潜在连续姊妹类群之一。Proterochampsians来自于阿根廷西部的伊瓜拉斯托-维拉乌尼翁盆地和巴西南部的巴拉那盆地。该类群的传统组成包括喜瑞龙属Price 1946、原鳄属Reig 1959（有两个物种：阿根廷的P. barrionuevoi和巴西的P. nodosa Barberena 1982）、Chanaresuchus Romer（来自阿根廷的两个物种：C. bonapartei Romer和C. ischigualastensis Trotteyn et al. 2012）、Gualosuchus reigi Romer 1971和Tropidosuchus romeri Arcucci 1990。在经历了一段关于它们与鳄龙类的关系的混乱历史之后，在过去的20年里，新的分类群的发现，以及更系统和系统发育的研究，已经澄清了它们作为非主龙类主龙形目的位置，以及它们与其他三叠纪主龙类的关系。
Abstract Proterochampsia is a monophyletic group of crocodile-like archosauriforms currently endemic to the late Middle and early Late Triassic of South America considered as one of the potential successive sister-taxa of the crown group Archosauria. The proterochampsians come from the Ischigualasto-Villa Unión Basin in the west of Argentina and the Parana Basin in the south of Brazil. The traditional composition of the group includes the genera Cerritosaurus Price 1946, Proterochampsa Reig 1959 (with two species: P. barrionuevoi in Argentina and P. nodosa Barberena 1982 in Brazil), Chanaresuchus Romer (with two species from Argentina: C. bonapartei Romer and C. ischigualastensis Trotteyn et al. 2012), Gualosuchus reigi Romer 1971 and Tropidosuchus romeri Arcucci 1990. After a precladistic history of confusion about their relationships with crocodilians, in the last 20 years new discoveries of taxa, and more systematic and phylogenetic studies, have clarified their position as non-archosaurian archosauriforms and their relationships with other Triassic archosaurs.