A molecular phylogeny of Heterodonta (Bivalvia) based on small ribosomal subunit RNA sequences

被引:21
|
作者
Canapa, A [1 ]
Barucca, M [1 ]
Marinelli, A [1 ]
Olmo, E [1 ]
机构
[1] Univ Ancona, Fac Sci, Ist Biol & Genet, I-60131 Ancona, Italy
关键词
molecular phylogeny; Heterodonta; Bivalvia; Mollusca; 18S rDNA;
D O I
10.1006/mpev.2001.0992
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Within Heterodonta, phylogenesis has so far been studied almost exclusively on the basis of morphological data. Results have often been discordant, and an exhaustive molecular approach has not yet been attempted. The present study was undertaken to clarify the phylogenetic relationships obtaining among Heterodonta families through the analysis of ISS rRNA gene. To do this, the whole sequence of this gene was analyzed in 29 species of eight superfamilies of the order of Veneroida (Arcticoidea, Cardioidea, Galeommatoidea, Mactroidea, Solenoidea, Tellinoidea, Tridacnoidea, and Veneroidea) and in two superfamilies of Myoida (Pholaloidea and Myoidea). The study was extended by constructing phylogenetic trees using partial sequences. This strategy made it possible to include 11 additional species by introducing three further superfamilies: Chamoidea, Corbiculoidea, and Hiatellinoidea. At variance with the conclusions reached on the basis of morphological features, the molecular data clearly show that the Myoida species included in this study belong to Veneroida, thus undermining the legitimacy of the division of Heterodonta into two orders, and that considerable differences in the phylogenetic relationships obtain among superfamilies. (C) 2001 Academic Press.
引用
收藏
页码:156 / 161
页数:6
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