Cipactlichthys scutatus, gen. nov., sp. nov. a new Halecomorph (Neopterygii, Holostei) from the Lower Cretaceous Tlayua Formation of Mexico.
Cipactlichthys scutatus, gen. nov., sp. nov. a new Halecomorph (Neopterygii, Holostei) from the Lower Cretaceous Tlayua Formation of Mexico.
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DOI：
10.1371/journal.pone.0073551
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Alvarado-Ortega J
中科院分区：
文献类型：
--
作者：
Brito PM;Alvarado-Ortega J
本文根据墨西哥早白垩世Tlayua组的标本，描述了一新属、新种，即Cipactlichthys scuatus gen。ET sp.Nov的几个诊断特征，如真皮骨骼和鳞片，有大量的结节和脊部装饰；顶骨略长于宽，长度与额骨大致相同；颌骨延伸得很远，低于眶后缘，可达后眼眶板后三分之一；上颌骨后缘呈凸圆状；胸鳍缘略有凸起；胸鳍第一缕极长，可达骨盆鳍后缘；约37个前椎骨和7个尾侧中央；锁骨后方有一系列肥厚的鳞片；侧翼鳞片排列成两排深鳞片；背鳍一系列背鳍和腹鳍，构成背鳍和腹鳍中线，位于背鳍、肛鳍和尾鳍之间。包括两个外群和11个新翅目的系统发育分析证实了Holostei的单系和HalecMori的单系，尽管最后一个支系的支持很弱。Cipactlichthys scuatus被认为是(离子形目+镜形目)的姊妹群。
Based on specimens from the Lower Cretaceous Tlayua Formation of Mexico, we describe a new genus and species of Halecomorphi, Cipactlichthys scutatus gen. et sp. nov, which exhibits several diagnostic characters such as the dermal bones and the scales with ganoin and highly ornamented by numerous tubercles and ridges; parietal slightly longer than wide with approximately the same length as the frontal; jaws extending far, below the posterior orbital margin, reaching the posterior third of the postorbital plate; maxilla with a convexly rounded posterior margin; pectoral fin margins slightly convex; first ray of pectoral fin very long, reaching the posterior edge of the pelvic fin; about 37 preural vertebrae and 7 Ural centra; a series of hypertrophied scales just posterior to the cleithrum; arrangement of flank scales with two rows of deep scales; a series of dorsal and ventral scutes forming the dorsal and ventral midline, between the dorsal and anal fins and the caudal fin. A phylogenetic analysis including two outgroups and eleven neopterygians confirmed the monophyly of the Holostei as well as the monophyly of the Halecomorphi, although this last clade is weakly supported. Cipactlichthys scutatus was hypothesised as the sister-group of the (Ionoscopiformes + Amiiformes).
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DOI：
10.1111/j.1096-3642.2006.00201.x
发表时间：
2006-02-01
影响因子：
2.8
作者：
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通讯作者：
Brunet, M
影响因子：
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DOI：
10.1098/rspb.2006.3749
发表时间：
2007-02-22
影响因子：
4.7
作者：
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通讯作者：
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影响因子：
3
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