Danionella dracula, an Escape from the Cypriniform Bauplan via Developmental Truncation?
Danionella dracula, an Escape from the Cypriniform Bauplan via Developmental Truncation?
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DOI：
10.1002/jmor.20486
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发表时间：
2016-02-01
影响因子：
1.5
通讯作者：
Conway, Kevin W.
中科院分区：
文献类型：
--
作者：
Britz, Ralf;Conway, Kevin W.
我们提供了小型亚洲淡水鲤科鱼类丹尼奥拉·德古拉的骨学的详细描述。与包括其近亲斑马鱼Danio rerio在内的大多数其他鲤科动物相比，Dracula的骨骼显示出高度的发育截断。在大多数其他鲤科动物中，61块骨骼、部分骨骼或软骨在血吸虫中缺失。这种令人印象深刻的生物进化案例使它成为发育最截短的硬骨鱼之一，甚至是脊椎动物。Dracula Dracula缺乏定义鲤形目的8个独特同构体中的6个，因此比这个组中的任何其他成员都更戏剧性地偏离了鲤形鲍普兰。这种从硬骨鱼中最成功的鲍普兰逃脱可能是由于在德古拉血吸虫中遇到的有机体范围的繁殖促进的。通过使其骨骼结构恢复到其他鲤科鱼类的早期发育状态，德古拉可能成功地克服了与这一鲍普兰相关的进化限制，并开辟了新的进化途径，使其能够进化出许多惊人的形态新奇，包括其牙齿状的齿状突起和复杂的鼓器。(C)2015年威利期刊公司。
We provide a detailed account of the osteology of the miniature Asian freshwater cyprinid fish Danionella dracula. The skeleton of D. dracula shows a high degree of developmental truncation when compared to most other cyprinids, including its close relative the zebrafish Danio rerio. Sixty-one bones, parts thereof or cartilages present in most other cyprinids are missing in D. dracula. This impressive organism-wide case of progenesis renders it one of the most developmentally truncated bony fishes or even vertebrates. Danionella dracula lacks six of the eight unique synapomorphies that define the order Cypriniformes and has, thus, departed from the cypriniform Bauplan more dramatically than any other member of this group. This escape from one of the most successful Bauplane among bony fishes may have been facilitated by the organism-wide progenesis encountered in D. dracula. By returning in its skeletal structure to the early developmental condition of other cypriniforms, D. dracula may have managed to overcome the evolutionary constraints associated with this Bauplan and opened up new evolutionary avenues that enabled it to evolve a number of striking morphological novelties, including its tooth-like odontoid processes and a complex drumming apparatus. (C) 2015 Wiley Periodicals, Inc.