Evolution of caudal fin ray development and caudal fin hypural diastema complex in spotted gar, teleosts, and other neopterygian fishes.
Evolution of caudal fin ray development and caudal fin hypural diastema complex in spotted gar, teleosts, and other neopterygian fishes.
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DOI：
10.1002/dvdy.24630
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发表时间：
2018-06
期刊：
影响因子：
--
通讯作者：
Postlethwait JH
中科院分区：
文献类型：
--
作者：
Desvignes T;Carey A;Postlethwait JH
在硬骨鱼类中，辐鳍鱼的尾鳍从异尾的背腹不对称鳍转变为同尾的外部对称鳍，这是通过尚不清楚的进化发育机制实现的。我们研究了主要的生活actinopterygian谱系，包括polypteriformes，acipenseriformes，Holostei（加尔斯和bowfin），硬骨鱼，与已灭绝的neopteryans和基底硬骨鱼的报告相比，尾部骨骼。我们重点研究了尾下间隙复合体，它包括1）第2和第3尾下间隙之间的间隙，2）在3）尾脉管系统的分支处分隔两个结缔组织板;这些特征被认为是硬骨鱼共有的衍生特征，即突触形态。这些研究表明，加尔斯和硬骨鱼共享所有三个特征的硬脊膜下间隙复合体。缺乏一个复杂的这些功能，从bowfin，化石Holostei，干硬骨鱼主张在几个neopterygian和基底硬骨鱼谱系的重复，独立出现，或不太可能，许多独立的损失。我们进一步观察到，在加尔斯和硬骨鱼，最早的发展lepidotrichia与成人的身体水平轴对齐，从而参与外部对称。这些结果表明，在硬骨鱼类和加尔斯的尾下间隙复合体之间的neoprophians和，它出现了重复的平行进化，由于共享的遗传基础的遗传和发育程序（潜在的同源性）。由于尾下间隙复合体存在于异尾的鬣蜥中，所以这种复合体与同尾性无关。
The caudal fin of actinopterygians transitioned from a heterocercal dorsoventrally asymmetrical fin to a homocercal externally symmetrical fin in teleosts through poorly understood evolutionary developmental mechanisms. We studied the caudal skeleton of major living actinopterygian lineages, including polypteriformes, acipenseriformes, Holostei (gars and bowfin), and teleosts, compared to reports of extinct neopterygians and basal teleosteans. We focused on the hypural diastema complex, which includes 1) a gap between hypurals 2 and 3, that 2) separates two plates of connective tissue at 3) the branching of caudal vasculature; these features had been considered as a shared, derived trait of teleosts, a synapomorphy. These studies revealed that gars and teleosts share all three features of the hypural diastema complex. Absence of a complex with these features from bowfin, fossil Holostei, and stem Teleostei argues in favor of repetitive, independent emergence in several neopterygian and basal Teleostei lineages, or less likely, many independent losses. We further observed that in gars and teleosts, the earliest developing lepidotrichia align with the horizontal adult body axis, thus participating in external symmetry. These results suggest that the hypural diastema complex in teleosts and gars represents a homoplasy among neopterygians and that it emerged repeatedly by parallel evolution due to shared inherited underlying genetic and developmental programs (latent homology). Because the hypural diastema complex exists in gars with heterocercal tails, this complex is independent of homocercality.
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影响因子：
2.6
作者：
Cavin, L;Suteethorn, V
通讯作者：
Suteethorn, V
影响因子：
14.9
作者：
Bradford Y;Conlin T;Dunn N;Fashena D;Frazer K;Howe DG;Knight J;Mani P;Martin R;Moxon SA;Paddock H;Pich C;Ramachandran S;Ruef BJ;Ruzicka L;Bauer Schaper H;Schaper K;Shao X;Singer A;Sprague J;Sprunger B;Van Slyke C;Westerfield M
通讯作者：
Westerfield M
影响因子：
1.4
作者：
Arratia, Gloria;Tischlinger, Helmut
通讯作者：
Tischlinger, Helmut
影响因子：
1.4
作者：
Alvarado-Ortega, Jesus;Espinosa-Arrubarrena, Luis
通讯作者：
Espinosa-Arrubarrena, Luis
影响因子：
3.7
作者：
Brito PM;Alvarado-Ortega J
通讯作者：
Alvarado-Ortega J