Museum of Biological Diversity, The Ohio State University, Columbus, OH 43212, USA.
Mol Phylogenet Evol. 2010 Jul;56(1):77-90. doi: 10.1016/j.ympev.2010.03.025. Epub 2010 Mar 27.
Squids, cuttlefish and bobtail squids comprise the molluscan superorder Decapodiformes (Mollusca: Cephalopoda). Although these animals exemplify the morphological and ecological diversity seen in Cephalopoda, no previous study has focused resolving decapodiform relationships, particularly within Oegopsida, a large order comprised of pelagic squid. To further clarify the phylogenetic history of Decapodiformes, and Oegopsida in particular, molecular data for five genes (18S rRNA, 28S rRNA, Histone H3, 16S rRNA, COI) was collected for 90 taxa representing all major lineages and families and evaluated using parsimony, likelihood, and Bayesian analysis. Although ordinal relationships were sensitive to analytical method, several conclusions can be inferred: the pelagic order Myopsida is closely related to the benthic sepioids, whose relationships were ambiguous, and Bathyteuthoidea is distinct from Oegopsida. Within Oegopsida several clades are consistently recovered, some with previous morphological support (e.g. chiroteuthid, lepidoteuthid, histioteuthid families) while others suggest novel relationships (e.g. Architeuthidae+Neoteuthidae). This study, with its broad coverage of taxa, provides the first in-depth analysis of Decapodiformes with special focus on the morphologically and biogeographically diverse Oegopsida, confirms several sister-taxon relationships, and provides new hypotheses of cephalopod evolution in the open ocean.
鱿鱼、乌贼和短蛸属于软体动物超目十足目（软体动物：头足纲）。尽管这些动物是头足纲所具有的形态和生态多样性的典型代表，但以前没有研究集中于解决十足目动物的关系，特别是在以远洋鱿鱼为主要类群的 Oegopsida 目中。为了进一步阐明十足目动物，特别是 Oegopsida 目的系统发育历史，我们收集了代表所有主要谱系和科的 90 个分类单元的 5 个基因（18S rRNA、28S rRNA、组蛋白 H3、16S rRNA、COI）的分子数据，并使用简约法、似然法和贝叶斯分析法进行了评估。尽管目级关系对分析方法敏感，但可以推断出几个结论：远洋目 Myopsida 与底栖乌贼目密切相关，而乌贼目之间的关系模棱两可，Bathyteuthoidea 与 Oegopsida 不同。在 Oegopsida 目中，一些支系经常被回收，其中一些具有先前的形态学支持（例如，短尾乌贼科、长尾乌贼科、Histioteuthidae 科），而其他支系则暗示了新的关系（例如，Architeuthidae+Neoteuthidae 科）。本研究广泛涵盖了分类单元，首次对头足类动物进行了深入分析，特别关注形态和生物地理上多样化的 Oegopsida 目，确认了几个姐妹分类群关系，并提供了头足类动物在开阔海域进化的新假说。
