Morphology of Luolishania longicruris (Lower Cambrian, Chengjiang Lagerstatte, SW China) and the phylogenetic relationships within lobopodians
Morphology of Luolishania longicruris (Lower Cambrian, Chengjiang Lagerstatte, SW China) and the phylogenetic relationships within lobopodians
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DOI：
10.1016/j.asd.2009.03.001
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发表时间：
2009-07-01
影响因子：
2
通讯作者：
Bergstrom, Jan
中科院分区：
文献类型：
--
作者：
Ma, Xiaoya;Hou, Xianguang;Bergstrom, Jan
在澄江下寒武统Lagerstarte中发现了一种新的Lobopodian化石Luolishania longicruris。这些标本为该物种的几个形态特征提供了新的线索，包括成对的触角状突起、眼睛、头盾、刚毛和其他表皮突起，以及分化的骨片、附属物、爪和叶足间隙。L. longicruris显示发育良好的tagmosis：一个明显的头部和一个分为两部分的躯干。新的数据允许与其他lobopodians进行修订比较。Miraloolishania haikouensis Liu et al.，2004被认为是L. longicruris Hou and Chen，1989.肠道充盈和特化形态特征的证据表明L. longicruris可能有一种过滤进食的生活方式。一项新的分支系统学分析表明，Lobopodians化石是并系的，甚至是复系的。longicruris可能是导致节肢动物的茎谱系的重要代表。(C)2009爱思唯尔有限公司版权所有。
New material of the lobopodian Luolishania longicruris has been recovered from the Lower Cambrian Chengjiang Lagerstatte, southwest China. The specimens throw new light on several morphological features of the species, including the paired antenniform outgrowths, eyes, head shield, setae and other cuticular projections, as well as the differentiated sclerites, appendages, claws, and lobopod interspaces. L. longicruris shows well developed tagmosis: a distinct head and a trunk divided into two sections. The new data allow a revised comparison with other lobopodians. Miraluolishania haikouensis Liu et aL, 2004 is considered to be a junior synonym of L. longicruris Hou and Chen, 1989. Evidence from gut filling and specialized morphological characters indicates that L. longicruris may have had a filter feeding lifestyle. A new cladistic analysis suggests that fossil lobopodians are paraphyletic or even polyphyletic and L. longicruris may be an important representative of the stem lineage leading to arthropods. (C) 2009 Elsevier Ltd. All rights reserved.