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| A POSSIBLE EARLY CAMBRIAN CHORDATE |
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| Author(s): CHEN JY, DZIK J, EDGECOMBE GD, RAMSKOLD L, ZHOU GQ |
| Source: NATURE Volume: 377 Issue: 6551 Pages: 720-722 Published: OCT 26 1995 |
| Times Cited: 82 References: 30 |
| Abstract: THE first chordate recorded from the Early Cambrian is the cephalochordate Yunnanozoon lividum from the 525 million-year-old Chengjiang fauna. Chordate features of Yunnanozoon are a notochord and an expanded filter-feeding pharynx with an endostyle. Segmented musculature and metameric branchial arches are shared with cephalochordates and craniates. Metameric gonads and an anteriorly extended notochord indicate cephalochordate affinities. Yunnanozoon expands the range of cephalochordate morphology known from the younger Pikaia gracilens and crown group forms such as amphioxus. Our identification predicts that other chordate clades (tunicates and craniates) had evolved by the tate Atdabanian, in the main burst of the Cambrian Explosion. |
| Document Type: Article |
| Language: English |
Addresses:
1. UPPSALA UNIV, MUSEUM PALEONTOL, S-75236 UPPSALA, SWEDEN
2. NANJING INST GEOL & PALAEONTOL, NANJING 210008, PEOPLES R CHINA
3. POLISH ACAD SCI, INST PALEOBIOL, PL-02089 WARSAW, POLAND
4. AUSTRALIAN MUSEUM, SYDNEY, NSW 2000 AUSTRALIA |
| Publisher: MACMILLAN MAGAZINES LTD, 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: TB469 |
| ISSN: 0028-0836 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |