Wakabayashi T, Suzuki N, Sakai M, Ichii T, Chow S
National Research Institute of Far Seas Fisheries, Japan.
Mar Genomics. 2012 Sep;7:11-6. doi: 10.1016/j.margen.2012.04.005. Epub 2012 May 23.
Squids of the family Ommastrephidae are distributed worldwide, and the family includes many species of commercial importance. To investigate phylogenetic relationships among squid species of the family Ommastrephidae, partial nucleotide sequences of two mitochondrial gene loci (cytochrome c oxidase subunit I [1277bp] and 16S rRNA [443bp]) of 15 ommastrephid species and two outgroup species from the families Loliginidae and Enoploteuthidae were determined and used to construct parsimony and distance based phylogenetic trees. The molecular data provided several new phylogenetic inferences. The monophyletic status of three subfamilies (Illicinae, Todarodinae and Ommastrephinae) was well supported, although phylogenetic relationships between the subfamilies were not resolved. Inclusion of a problematic species, Ornithoteuthis volatilis, to Todarodinae was indicated. Within Todarodinae, the Japanese common squid Todarodes pacificus was observed to have much closer relationship to the species of the genus Nototodarus than to its congener (Todarodes filippovae). These results indicate that re-evaluation of several morphological key characters for ommastrephid taxonomy may be necessary.
柔鱼科鱿鱼分布于全球，该科包含许多具有商业重要性的物种。为了研究柔鱼科鱿鱼物种之间的系统发育关系，测定了15种柔鱼科物种以及来自枪乌贼科和帆乌贼科的两个外类群物种的两个线粒体基因位点（细胞色素c氧化酶亚基I[1277bp]和16S rRNA[443bp]）的部分核苷酸序列，并用于构建基于简约法和距离法的系统发育树。分子数据提供了几个新的系统发育推断。三个亚科（鸢乌贼亚科、茎柔鱼亚科和柔鱼亚科）的单系地位得到了很好的支持，尽管亚科之间的系统发育关系尚未解决。结果表明茎柔鱼亚科应包含有问题的物种——飞柔鱼。在茎柔鱼亚科内，观察到日本枪乌贼与鸢乌贼属的物种关系比与其同属物种（斐氏枪乌贼）更为密切。这些结果表明可能有必要重新评估柔鱼科分类学中的几个形态学关键特征。
