Stem sarcopterygians have primitive polybasal fin articulation
文献类型：期刊论文
| 作者 | Zhu, Min; Yu, Xiaobo; zhumin@ivpp.ac.cn |
| 刊名 | BIOL LETTERS
 |
| 出版日期 | 2009 |
| 卷号 | 5期号:3页码:372—375 |
| 关键词 | Pectoral Fin Tetrapod Limb Paired Fins Fish Evolution Coelacanth Origin |
| ISSN号 | 1744-9561 |
| 英文摘要 | Among osteichthyans, basal actinopterygian fishes (e.g. paddlefish and bowfins) have paired fins with three endoskeletal components (pro-, meso- and metapterygia) articulating with polybasal shoulder girdles, while sarcopterygian fishes (lungfish, coelacanths and relatives) have paired fins with one endoskeletal component (metapterygium) articulating with monobasal shoulder girdles. In the fin-limb transition, the origin of the sarcopterygian paired fins triggered new possibilities of fin articulation and movement, and established the proximal segments (stylopod and zeugopod) of the presumptive tetrapod limb. Several authors have stated that the monobasal paired fins in sarcopterygians evolved from a primitive polybasal condition. However, the fossil record has been silent on whether and when the inferred transition took place. Here we describe three-dimensionally preserved shoulder girdles of two stem sarcopterygians (Psarolepis and Achoania) from the Lower Devonian of Yunnan, which demonstrate that stem sarcopterygians have polybasal pectoral fin articulation as in basal actinopterygians. This finding provides a phylogenetic and temporal constraint for studying the origin of the stylopod, which must have originated within the stem sarcopterygian lineage through the loss of the propterygium and mesopterygium. |
| URL标识 | 查看原文 |
| 公开日期 | 2013-11-27 |
| 源URL | [http://119.78.100.205/handle/311034/4734]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 通讯作者 | zhumin@ivpp.ac.cn |
| 推荐引用方式 GB/T 7714 | Zhu, Min,Yu, Xiaobo,zhumin@ivpp.ac.cn. Stem sarcopterygians have primitive polybasal fin articulation[J]. BIOL LETTERS,2009,5(3):372—375. |
| APA | Zhu, Min,Yu, Xiaobo,&zhumin@ivpp.ac.cn.(2009).Stem sarcopterygians have primitive polybasal fin articulation.BIOL LETTERS,5(3),372—375. |
| MLA | Zhu, Min,et al."Stem sarcopterygians have primitive polybasal fin articulation".BIOL LETTERS 5.3(2009):372—375. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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