Digestive system and feeding mode in Cambrian naraoiid arthropods
Vannier, J; Chen, JY (陈均远)
2002-06-01
发表期刊LETHAIA
ISSN0024-1164
卷号35期号:2页码:107-120
摘要

The function of the digestive system of naraoiid arthropods is interpreted in the light of new observations on Early Cambrian specimens from China and detailed comparisons with Recent crustaceans and other arthropods. In naraoiids, paired tubular diverticulae ending as blind caeca are present along the entire midgut, and are interpreted as sites for the secretion of digestive enzymes. Naraoia bears one pair of long, ramifying, distensible diverticulae, possibly used for both food storage and digestion as suggested by Recent analogues (e.g. branchiuran and isopod crustaceans and limulids). Naraoiids were probably epibenthic scavengers/preclators rather than mud-eaters. They were either opportunistic intermittent feeders (Naraoia) or more regular feeders (Misszhouia). The mud-fills of the alimentary canals are likely to be artefacts due to taphonomic and weathering processes or, less likely, to sediment ingestion by animals trapped alive in turbiditic flows. The case Study of naraoiid arthropods adds to other fossil evidence supporting the idea that predation played a key role in the Early Cambrian food-webs and that organs adapted for this purpose had already reached a high level of diversity and anatomical sophistication.

关键词Arthropoda Branchiura Cambrian Chengjiang China Crustacea Digestive System Maotianshan Shale Naraoiids Recent
语种英语
关键词[WOS]Burgess Shale ; British-columbia ; Functional-morphology ; Branchiura ; Crustacea ; Evolution ; Fossils
WOS研究方向Paleontology
WOS类目Paleontology
WOS记录号WOS:000177294000002
出版者WILEY-BLACKWELL
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/1114
专题中国科学院南京地质古生物研究所
其他
通讯作者Vannier, J
作者单位1.Univ Lyon 1, UFR Sci Terre, UMR PEPS, FR-69622 Villeurbanne, France
2.Acad Sinica, Nanjing Inst Geol & Palaeontol, NIGPAS, Nanjing 210008, Peoples R China
3.Early Life Res Ctr, Yunnan 652500, Peoples R China
推荐引用方式
GB/T 7714
Vannier, J,Chen, JY . Digestive system and feeding mode in Cambrian naraoiid arthropods[J]. LETHAIA,2002,35(2):107-120.
APA Vannier, J,&Chen, JY .(2002).Digestive system and feeding mode in Cambrian naraoiid arthropods.LETHAIA,35(2),107-120.
MLA Vannier, J,et al."Digestive system and feeding mode in Cambrian naraoiid arthropods".LETHAIA 35.2(2002):107-120.
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