globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0093105
论文题名:
A New Notosuchian from the Late Cretaceous of Brazil and the Phylogeny of Advanced Notosuchians
作者: Diego Pol; Paulo M. Nascimento; Alberto B. Carvalho; Claudio Riccomini; Ricardo A. Pires-Domingues; Hussam Zaher
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2014
发表日期: 2014-4-2
卷: 9, 期:4
语种: 英语
英文关键词: Dentition ; Maxilla ; Skull ; Teeth ; Phylogenetic analysis ; Cretaceous period ; Phylogenetics ; Paleogenetics
英文摘要: A new notosuchian crocodyliform from the Late Cretaceous Bauru Group found in the southeastern State of São Paulo (Brazil) is described here. The new taxon, Caipirasuchus stenognathus, is referred as a new species of the recently erected genus Caipirasuchus within the clade Sphagesauridae based on a phylogenetic analysis of basal mesoeucrocodylians. Caipirasuchus stenognathus is represented by an almost complete skull and lower jaw that has autapomorphic characters that distinguish it from other species of Sphagesauridae. These autapomorphies include: maxilla forming part of the orbital margin (absence of lacrimal-jugal contact), nasal with smooth depressions on the posterior region close to the contact with the maxilla and lacrimal, postorbital with posterior palpebral facet that extends posteriorly underneath the ear-flap groove, and a distinct anterior process of the medial flange of the retroarticular process. Additionally, the new taxon lacks autapomorphic features described in other sphagesaurids. The phylogenetic analysis results in a monophyletic genus Caipirasuchus, that is the sister group of a clade fomed by Sphagesaurus huenei, Caryonosuchus pricei, and Armadillosuchus arrudai. Sphagesaurids also include a basal clade formed by Adamantinasuchus navae and Yacarerani boliviensis. Other notosuchian taxa, such as Mariliasuchus amarali, Labidiosuchus amicum, Notosuchus terrestris, and Morrinhosuchus luziae are successive sister taxa of Sphagesauridae, forming a clade of advanced notosuchians that are restricted to the Late Cretaceous of South America. These results contrast with most previous phylogenetic hypotheses of the group that depicted some members of Sphagesauridae as more closely related to baurusuchids, or found Asian (e.g., Chimaerasuchus) or African (Malawisuchus, Pakasuchus) forms nested within advanced notosuchians that are, according to our analysis, endemic of the Late Cretaceous of South America.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0093105&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/18422
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: CONICET, Museo Paleontológico Egidio Feruglio, Trelew, Chubut, Argentina;Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil;Programa de Pós-Graduação em Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil;Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil;Instituto de Geociências, Universidade de São Paulo, São Paulo, Brazil;Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil;Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil

Recommended Citation:
Diego Pol,Paulo M. Nascimento,Alberto B. Carvalho,et al. A New Notosuchian from the Late Cretaceous of Brazil and the Phylogeny of Advanced Notosuchians[J]. PLOS ONE,2014-01-01,9(4)
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