Preliminary Study on Phylogenetic Relationships of Cypridocopina （Ostracoda: Podocopida） Based on 18S rDNA Sequences(Chinese)
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摘要: 基于1 720 bp的18S rRNA基因序列以Darwinula sp.和Cytherelloidea. munechikai为外群,采用最大简约法（MP法）和邻接法（NJ法）对腺介虫亚目（Cypridocopina）3总科5科9种动物的系统发育关系进行了分析.结果表明：1） 现生腺介虫亚目动物为单系群；2） 两种营海水生活的介形类—海介虫总科（Pontocypridoidea）和大介虫总科（Macrocypridoidea）间的亲缘关系较近；3） 现生腺介虫总科（Cypridoidea）也为单系群，但该总科内各科间关系较复杂，主要分为两支，其中腺介虫科的Dolerocypris sp.与萤光介虫科的Candona holzkanpfi聚成一支；而萤光介虫科的Cypria crenulata和泥介虫科的Ilyocypris. angulata同时与腺介虫科其它动物聚为一支.
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关键词:
- 介形类 /
- 腺介虫亚目 /
- 18S rDNA序列 /
- 系统发育
Abstract: Nucleotide sequences for the 18S rDNA (1 720 bp) of 11 ostracoda species, representing 3 superfamilies and 5 families, were analyzed based on maximum parsimony （MP） and neighbor joining （NJ）. The topologies of phylogenetic relationships gained by two analytic methods are similar. The results shown: 1） Cypridocopina forms a monophyletic group; 2）Close rationship between Pontocypridoidea and Macrocypridoidea can be postulated; 3）Cypridoidea is considered as a monophyletic group, but the rationships among cypridoidean families could not be resolved from 18S rDNA.-
Key words:
- ostracodesCypridocopina18S rDNAphylogeny /
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