Honda Masanao, Yasukawa Yuichirou, Hirayama Ren, Ota Hidetoshi
Tropical Biosphere Research Center, University of the Ryukyus, Okinawa, Japan.
Zoolog Sci. 2002 Nov;19(11):1305-12. doi: 10.2108/zsj.19.1305.
Phylogenetic relationships of the genus Cuora sensu lato (Cuora sensu stricto and Cistoclemmys) and other testudinoid genera were inferred from variations in 882 base positions of mitochondrial 12S and 16S rRNA genes. Results yielded a robust support to the monophyly of a group (Cuora group) consisting of Cuora sensu lato and the monotypic Pyxidea. Within the Cuora group, the continental Cuora (sensu stricto) and the two subspecies of Ci. flavomarginata constituted two well-supported monophyletic groups. Distinctly small interspecific genetic distances in the former groups suggested that in the continent speciations in Cuora took place much later than the primary divergences in the Cuora group, or speciations in other related genera, such as Mauremys. Our analyses failed to provide a substantial support to the monophyly of any other combinations of taxa within the Cuora group, including Cuora in broad and strict senses, and Cistoclemmys as consisting of Ci. galbinifrons and Ci. flavomarginata. Besides these, our results also suggested the non-monophyly for the Batagurinae and the Geoemydinae, and sister relationships of the Bataguridae with Testudinidae rather than with the Emydidae.
基于线粒体12S和16S rRNA基因882个碱基位置的变异，推断了广义闭壳龟属（狭义闭壳龟属和盒龟属）与其他龟鳖类属之间的系统发育关系。结果有力支持了由广义闭壳龟属和单型属锯缘摄龟组成的一个类群（闭壳龟类群）的单系性。在闭壳龟类群中，大陆闭壳龟（狭义）和黄缘盒龟的两个亚种构成了两个得到有力支持的单系类群。前一类群中明显较小的种间遗传距离表明，在大陆上，闭壳龟的物种形成比闭壳龟类群中的初始分化，或其他相关属（如眼斑水龟属）的物种形成要晚得多。我们的分析未能为闭壳龟类群内任何其他分类单元组合的单系性提供实质性支持，包括广义和狭义的闭壳龟，以及由黄额盒龟和黄缘盒龟组成的盒龟属。除此之外，我们的结果还表明地龟亚科和潮龟亚科并非单系类群，以及地龟科与陆龟科而非水龟科为姐妹关系。
