Abstract：
Comprising about 60 % of gastropod diversity, caenogastropods display almost all kinds of shell forms and include many commercially important marine groups. Although the monophyly of Caenogastropoda has been widely accepted, thier internal phylogenetic relationships remain unclear. In the present study, a total of 27 caenogastropods belonging to eight superfamilies were sequenced and used for phylogenetic reconstruction. All newly sequenced mitogenomes adhered to the consensus gene order of caenogastropods, except for those of Vanikoroidea, Vermetoidea and Cerithioidea, which involved protein-coding genes. The reconstructed mitogenomic phylogeny suggested the monophylies of Architaenioglossa, Sorbeoconcha, Hypsogastropoda and the siphonate clade. The present study also identified a close affinity among Cypraeoidea, Ficoidea, Tonnoidea, and Neogastropoda, supported by the presence of a pleurembolic proboscis. The monophyly of Neogastropoda was not supported, as Cancellariidae was found to be sister to the limpet-shaped group Calyptraeoidea, and (Tonooidea + Ficoidea) were sister to the remaining neogastropods. This study provides important information for better understanding the evolution of caenogastropods, as well as for the protection and utilization of these diverse and economically significant marine resources.
摘要：
包括大约60%的腹足动物多样性，caenogastropods显示几乎所有种类的壳形式，包括许多商业上重要的海洋类群。尽管Caenogastropoda的单相性已被广泛接受，内部系统发育关系尚不清楚。在本研究中,对属于八个超家族的总共27个食虫足类动物进行了测序，并用于系统发育重建。所有新测序的有丝分裂基因组都符合天足类动物的共有基因顺序，除了Vanikoroidea,Vermetoidea和Cerithiidea,涉及蛋白质编码基因。重建的有丝分裂基因组系统发育表明了Architaenioglossa的单系，Sorbeoconcha,腹足纲和虹吸进化枝。本研究还确定了Cypraeoidea之间的密切关系，Ficoidea,Tonnoidea,和新腹足动物,由胸膜长鼻的存在支持。不支持新腹足动物的单面结构，因为发现Cancellariidae是帽贝形群Calyptraeoidea的姐妹，和（TonooideaFicoidea）是其余新腹足动物的姐妹。这项研究为更好地理解caenogastropods的进化提供了重要的信息，以及保护和利用这些多样化和具有经济意义的海洋资源。
