捷克Nýřany晚石炭世索诺顿龙的重新描述及其系统发育关系

IF 1.4 4区 地球科学 Q3 Earth and Planetary Sciences
Marylène Danto, Florian Witzmann, Johannes Müller
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引用次数: 6

摘要

对来自捷克共和国Nýřany(威斯特伐利亚D,晚石炭纪)的基生四足动物Solenodonsaurus janenschi Broili进行了重新描述,并对其系统发育位置进行了重新评价。在上颌牙齿的底部有一个明显的凹槽被认为是一个自形特征,这在大样本和小样本中都存在。其他的特征,并不是唯一的S. janenschi,有:泪道的延伸,形成眶的前腹缘;侧耳:侧耳后长的延伸;线轴状椎骨,和小的楔状椎间。基于Ruta、Coates和quickke数据矩阵的系统发育分析表明,S. janenschi是Lepospondyli的姐妹类群。共同的特征包括椎骨的形状,非肿胀的神经弓,以及颞间关节的缺失。虽然在羊膜干内嵌套,但与基底羊膜的关系并不像以前认为的那样密切。一个相当细长的肱骨说明了主要的陆地生活方式,而弯曲细长的肋骨,以及相对较小的头骨,表明肺的肋侧通气与羊膜类似,而不是颊侧泵气。浅层鳞片的形态没有骨化的背缘,因此不太可能存在鼓室。(©2012 WILEY-VCH Verlag GmbH &KGaA公司,Weinheim)
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Redescription and phylogenetic relationships of Solenodonsaurus janenschi Broili, 1924, from the Late Carboniferous of Nýřany, Czech Republic

The basal tetrapod Solenodonsaurus janenschi Broili, 1924, from Nýřany (Westphalian D, Late Carboniferous), Czech Republic, is redescribed and its phylogenetic position reevaluated. A distinct groove at the base of the maxillary teeth is regarded as an autapomorphic character, which is present in both the large and small specimens. Other characteristic features, which are not unique to S. janenschi, are: an extension of the lacrimal that forms the anteroventral margin of the orbit; a long posterior extension of the jugal; spool-shaped vertebrae, and small, wedge-like intercentra. A phylogenetic analysis based on the data matrix of Ruta, Coates and Quicke suggests that S. janenschi is the sister taxon of the Lepospondyli. Shared characters include the shape of the vertebrae, non-swollen neural arches, and absence of an intertemporal. Although nested within the amniote stem, S. janenschi is not as closely related to basal amniotes as previously suggested. A rather long, slender humerus argues for a predominantly terrestrial mode of life, and the curved, slender ribs, as well as the comparatively small skull, suggest costal ventilation of the lungs similar to that in amniotes, rather than buccal pumping. The morphology of the shallow squamosal embayment in which an ossified dorsal margin is absent, renders the presence of a tympanum unlikely. (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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来源期刊
Fossil Record
Fossil Record PALEONTOLOGY-
CiteScore
2.50
自引率
7.10%
发文量
18
审稿时长
>12 weeks
期刊介绍: Fossil Record (FR) is the palaeontological journal of the Museum für Naturkunde Berlin. This journal was founded in 1998 under the name Mitteilungen aus dem Museum für Naturkunde Berlin, Geowissenschaftliche Reihe and appears with two issues each year. Fossil Record publishes original papers in all areas of palaeontology including the taxonomy and systematics of fossil organisms, biostratigraphy, palaeoecology, and evolution. All taxonomic groups are treated, including invertebrates, microfossils, plants, and vertebrates.
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