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首页> 外文期刊>Journal of Systematic Palaeontology >A new Cretaceous dercetid fish (Neoteleostei: Aulopiformes) from the Turonian of Colombia
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A new Cretaceous dercetid fish (Neoteleostei: Aulopiformes) from the Turonian of Colombia

机译：来自哥伦比亚土伦的一种新的白垩纪尾鳍鱼类（Neoteleostei：Aulopiformes）

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摘要

The extinct neoteleost family Dercetidae includes elongate, long-jawed marine fishes that are known from the Late Cretaceous to Paleocene in deposits from the Levant, Europe, North Africa, England, Mexico and Brazil. The fossil record of the family in South America is very sparse and previously was restricted to outcrops in Brazil. Herein we describe a new dercetid fish from the Turonian of Colombia, †Candelarhynchus padillai gen. et sp. nov. A single articulated specimen is preserved in part and counterpart; the posterior part of the fish is missing. The specimen differs from other dercetid species by the following unique combination of morphological features: lack of scutes on the flanks of the body, presence of a single pair of transverse processes associated with the abdominal vertebrae, roofed posttemporal fossa, single row of small conical teeth on the dentary and maxilla, toothless premaxilla ornamented with pronounced longitudinal striations and protruding forward far beyond the anterior end of the dentary, and relatively large pectoral fins positioned high on the body. When included in a phylogenetic analysis of †Enchodontoidei, †C. padillai gen. et sp. nov. falls within a monophyletic family Dercetidae and is placed as sister taxon to the Late Cretaceous dercetid †Hastichthys from Israel, indicating faunal connections between the Eastern and Western Tethys. The new taxon provides novel insights into the distribution of dercetid fishes in the Western Tethys region during the early Late Cretaceous.
机译：灭绝的新teleostost兽科包括长而下颚的海鱼，这些鱼从白垩纪晚期到新世而来，它们来自黎凡特，欧洲，北非，英国，墨西哥和巴西。南美洲家庭的化石记录非常稀少，以前仅在巴西露头。在这里，我们描述了一种来自哥伦比亚突尼斯人的新的蜕皮鱼，†Candelarhynchus padillai gen。等。十一月一个单独的关节标本的一部分和对等物被保存；鱼的后部缺失。该标本与其他蜕皮动物的不同之处在于以下独特的形态特征组合：身体侧面没有开槽，与腹部椎骨相关的一对横突，屋顶颞颞窝，单排小圆锥形牙齿在牙齿和上颌骨上，无齿的上颌骨饰有明显的纵向条纹，向前突出远超过牙齿的前端，并且较大的胸鳍位于身体上方。当包含在†Enchodontoidei，†C的系统发育分析中时。帕迪莱根等。十一月属于单种动物科（Descetidae），并作为来自以色列的白垩纪晚期（Castacethys）ast属（Hastichthys）的姊妹类群，表明东西特提斯之间的动物联系。新的分类单元为白垩纪晚期晚期特提斯西部地区尾rc鱼类的分布提供了新颖的见解。

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