2024-03-28T12:37:58Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/711402022-11-17T02:08:08Zhdl_2115_20039hdl_2115_116Molecular Systematics of Tanaidacea (Crustacea: Peracarida) Based on 18S Sequence Data, with an Amendment of Suborder/Superfamily-Level Classification1000070723360Kakui, Keiichi1000080374198Katoh, ToruHiruta, Shimpei F.Kobayashi, Norio1000030360895Kajihara, Hiroshiopen accessTanaidaceaNeotanaidae18S rRNAphylogenetic relationshipsuborder/superfamily-levelclassification485Phylogenetic relationships within Tanaidacea were analyzed based on sequence data for the 18S rRNA gene. Our results strongly supported a monophyletic group composed of Neotanaidae, Tanaoidea, and Paratanaoidea, with the first two taxa forming a clade. These results contradict three previously suggested hypotheses of relationships. Based on the molecular results, and considering morphological similarities/differences between Neotanaidomorpha and Tanaidomorpha, we demoted Suborder Neotanaidomorpha to Superfamily Neotanaoidea within Tanaidomorpha; with this change, the classification of extant tanaidaceans becomes a two-suborder, four-superfamily system. This revision required revision of the diagnoses for Tanaidomorpha and its three superfamilies. The results for Apseudomorpha were ambiguous: this taxon was monophyletic in the maximum likelihood and Bayesian analyses, but paraphyletic in the maximum parsimony and minimum evolution analyses.2011engjournal articleVoRhttp://hdl.handle.net/2115/71140https://doi.org/10.2108/zsj.28.749219672230289-0003Zoological Science2810749757https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/71140/1/Zoological%20Science28-10_749-757%20%282011%29.pdfapplication/pdf1.01 MB2011