Hausdorf Bernhard, Röpstorf Peter, Riedel Frank
Zoologisches Institut und Zoologisches Museum der Universität Hamburg, Martin-Luther-King-Platz 3, 20146 Hamburg, Germany.
Mol Phylogenet Evol. 2003 Mar;26(3):435-43. doi: 10.1016/s1055-7903(02)00365-2.
The phylogenetic relationships and the origin of two groups of rissooid freshwater snails endemic to Lake Baikal were investigated using partial mitochondrial COI, 12S rDNA, and 16S rDNA sequences. The Baikalian Benedictiinae proved to be closely related to the Lithoglyphinae. According to a molecular clock estimate the two groups diverged in the Paleogene. The Benedictiinae might have evolved autochthonously in precursors of Lake Baikal. The Baikalian Baicaliidae are probably most closely related to the Amnicolidae and the Bithyniidae. These groups diverged at the latest during the Cretaceous. Thus the origin of the Baicaliidae predates the origin of the Baikal rift zone. The Baicaliidae evolved probably in other Central Asian freshwater reservoirs. However, the radiation of the extant Baicaliidae only started in the Neogene and might have occurred autochthonously in Lake Baikal. The conchological similarity of the Baicaliidae and the Pyrgulidae is due to convergence. The Pyrgulidae diverged from the common stem lineage of the other hydrobiid families at the latest in the Jurassic. The Bithyniidae is derived from hydrobiids and is related to the Amnicolidae.
利用线粒体COI、12S rDNA和16S rDNA部分序列，对贝加尔湖特有的两组丽蚌科淡水蜗牛的系统发育关系和起源进行了研究。结果表明，贝加尔湖的本尼迪克蒂亚科与石印亚科关系密切。根据分子钟估计，这两个类群在古近纪发生了分化。本尼迪克蒂亚科可能在贝加尔湖的前身中就地演化。贝加尔湖的贝加尔蚌科可能与泥蚶科和短沟蜷科关系最为密切。这些类群最晚在白垩纪发生了分化。因此，贝加尔蚌科的起源早于贝加尔裂谷带的起源。贝加尔蚌科可能在其他中亚淡水水域中演化。然而，现存贝加尔蚌科的辐射仅在新近纪开始，并且可能在贝加尔湖就地发生。贝加尔蚌科和小田螺科的贝壳学相似性是趋同进化的结果。小田螺科最晚在侏罗纪从其他椎实螺科的共同祖先谱系中分化出来。短沟蜷科起源于椎实螺科，与泥蚶科有关。
