粗齿囊鼠属和帕氏囊鼠属囊鼠的分类学与系统地理学

Systematics and phylogeography of pocket gophers in the genera Cratogeomys and Pappogeomys.

作者信息

Demastes James W, Spradling Theresa A, Hafner Mark S, Hafner David J, Reed David L

机构信息

Department of Biology, University of Northern Iowa, Cedar Falls, Iowa 50614, USA.

出版信息

Mol Phylogenet Evol. 2002 Jan;22(1):144-54. doi: 10.1006/mpev.2001.1044.

DOI:10.1006/mpev.2001.1044

PMID:11796037

Abstract

Mitochondrial-DNA sequence data were analyzed from individuals sampled from 38 localities across the complete geographic range of the closely related pocket gopher genera Pappogeomys and Cratogeomys. Results of phylogenetic analysis of 1133 base pairs from the cytochrome b gene are consistent with past hypotheses of relationships among members of the castanops species group within the genus Cratogeomys. However, phylogeographic variation within the gymnurus species group of the genus Cratogeomys differs significantly from relationships reflected by current taxonomy. The data indicate that there are five geographically distinct clades within the gymnurus species group. Members of the two nominal species C. gymnurus and C. tylorhinus are scattered among these clades. The three peripherally isolated species, C. fumosus, C. neglectus, and C. zinseri, do not appear to be genetically distinct from other gymnurus species group taxa. An historical biogeographic hypothesis is proposed that will be tested using nuclear DNA data.

摘要

对从亲缘关系密切的囊鼠属（Pappogeomys）和粗囊鼠属（Cratogeomys）整个地理分布范围内的38个地点采集的个体的线粒体DNA序列数据进行了分析。对细胞色素b基因1133个碱基对的系统发育分析结果与过去关于粗囊鼠属（Cratogeomys）内锥栗鼠物种组各成员间关系的假设一致。然而，粗囊鼠属（Cratogeomys）裸尾囊鼠物种组内的系统地理学变异与当前分类学所反映的关系有显著差异。数据表明，裸尾囊鼠物种组内有五个地理上不同的分支。两个命名物种粗尾粗囊鼠（C. gymnurus）和泰勒粗囊鼠（C. tylorhinus）的成员分散在这些分支中。三个边缘隔离物种，烟色粗囊鼠（C. fumosus）、疏毛粗囊鼠（C. neglectus）和津氏粗囊鼠（C. zinseri），在基因上似乎与裸尾囊鼠物种组的其他分类单元没有区别。提出了一个历史生物地理学假设，将使用核DNA数据进行检验。