Developmental patterns and the identification of homologies in the avian hand
Developmental patterns and the identification of homologies in the avian hand
复制标题
DOI：
10.1126/science.278.5338.666
复制
发表时间：
1997-10-24
期刊：
影响因子：
56.9
通讯作者：
Feduccia, A
中科院分区：
文献类型：
--
作者：
Burke, AC;Feduccia, A
鸟类手中数字的同源性已经争论了150年。分支分析将鸟类与兽脚类恐龙联系在一起。兽脚亚目动物的手只保留手指I-II-III，因此现代鸟类的手指通常被识别为I-II-III。对羊膜胚胎(包括各种鸟类)中发育中的手掌和手掌的研究表明，软骨凝聚的刻板模式。软骨凝结的主轴在所有物种中都可见，穿过肱骨到第四指。与后肢的连续同源元素比较表明，鸟类手的保留的手指是II-III-IV。
Homologies of digits in the avian hand have been debated for 150 years. Cladistic analysis nests birds with theropod dinosaurs. Theropod hands retain only digits I-II-III, so digits of the modern bird hand are often identified as I-II-III, Study of the developing manus and pes in amniote embryos, including a variety of avian species, shows stereotyped patterns of cartilage condensations. A primary axis of cartilage condensation is visible in all species that runs through the humerus into digit IV. Comparison to serially homologous elements of the hindlimb indicates that the retained digits of the avian hand are II-III-IV.