Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA.
Mol Phylogenet Evol. 2010 Jul;56(1):468-73. doi: 10.1016/j.ympev.2009.12.002. Epub 2009 Dec 16.
Nucleotide sequences from the cytochrome c oxidase subunit I (COI) gene were used to test for genetic differentiation in the rocky intertidal isopod crustacean, Ligia occidentalis (Ligiidae), from the eastern Pacific. Phylogenetic analyses showed that individuals of L. occidentalis from southern California, USA to Manzanillo, Colima, Mexico partitioned into 15 highly-divergent clades. Mean Kimura 2-parameter (K2P) genetic distances among clades ranged from 13.2% to 26.7%. These values are similar to interspecific genetic distances found in a wide variety of crustaceans, including Ligia spp., suggesting that the taxon L. occidentalis represents a complex of cryptic species.
利用细胞色素 c 氧化酶亚基 I (COI) 基因的核苷酸序列，对来自东太平洋的岩质潮间带等足目甲壳动物 Ligia occidentalis（Ligiidae）进行遗传分化测试。系统发育分析表明，来自美国南加州至墨西哥曼萨尼略的 Ligia occidentalis 个体分为 15 个高度分化的分支。分支间的平均 Kimura 2-参数（K2P）遗传距离在 13.2%至 26.7%之间。这些值与在包括 Ligia spp.在内的各种甲壳动物中发现的种间遗传距离相似，表明分类群 L. occidentalis 代表一个隐种复合体。
