A cladistic phylogeny of the family Patellidae (Mollusca: Gastropoda)
A cladistic phylogeny of the family Patellidae (Mollusca: Gastropoda)
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Patellidae 科的分支系统发育（软体动物：腹足纲）
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
A. Hodgson
中科院分区：
文献类型：
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作者：
S. Ridgway;D. Reid;John D. Taylor;G. Branch;A. Hodgson
通过对37个种的形态特征进行支序分析，重建了一个系统发育假说。分析中包括的特征来自壳的形状和显微结构，头足和套膜复合体，齿舌和精子。该物种分为四个分支，提供了一个新的系统发育分类为四个单系属的基础：Helcion（4种;南部非洲），Cymbula（8种;南部非洲，东大西洋，南印度洋），Scutellastra（17种;南部和西南部非洲，澳大利亚，印度-西太平洋，东太平洋）和Patella（9种;东北大西洋和地中海）。分析表明，姐妹集团之间的关系Helcion和Cymbula，和Scutellastra和髌骨。结合现今的地理分布模式，这个系统发育假说被用来讨论Patellidae的历史地理。盾甲藻可能起源于非洲南部，散布于太平洋，或者可能是一个独立的特提斯群。Helcion和Cymbula似乎都起源于南部非洲，但Cymbula的三个物种分别分布在非洲西北部、圣赫勒拿岛和南印度洋。大西洋东北部的Patellas形成了一个单一的分支Patella（包括P. pellucida），可能是来自南部非洲的祖先向北扩散，或者可能是广泛分布的祖先特提斯分布的替代。已知的小卫星化石记录太零碎，无法在这些替代品中做出选择。
A phylogenetic hypothesis for the patellid limpets is reconstructed by cladistic analysis of morphological characters from 37 species, representing all but one of the living members of the family. Characters included in the analysis are derived from shell shape and microstructure, headfoot and pallial complex, radula and sperm. The species fall into four clades, providing the basis for a new phylogenetic classification into four monophyletic genera: Helcion (four species; southern Africa), Cymbula (eight species; southern Africa, eastern Atlantic, southern Indian Ocean), Scutellastra (17 species; southern and southwestern Africa, Australia, Indo–West Pacific, Eastern Pacific) and Patella (nine species; northeastern Atlantic and Mediterranean). The analysis suggests sister–group relationships between Helcion and Cymbula , and between Scutellastra and Patella . In combination with present–day patterns of geographical distribution, this phylogenetic hypothesis is used to discuss the historical biogeography of the Patellidae. Scutellastra may have originated in southern Africa and dispersed across the Pacific, or alternatively may be a primitively Tethyan group. Both Helcion and Cymbula appear to have originated in southern Africa, but three Cymbula species have dispersed respectively to northwest Africa, St Helena and the southern Indian Ocean. The patellids of the northeastern Atlantic form a single clade, Patella (including P. pellucida ), which may have arrived by northward dispersal of an ancestor from southern Africa, or possibly by vicariance of a widespread ancestral Tethyan distribution. The known fossil record of patellids is too fragmentary to permit choice between these alternatives.