New gammaroid family, genera and species from subterranean waters of Japan, and their phylogenetic relationships (Crustacea: Amphipoda) |
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Authors: | KO TOMIKAWA NORIO KOBAYASHI HIROSHI MORINO SHUNSUKE F. MAWATARI |
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Affiliation: | Division of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo, 060-0810 Japan; The Hokkaido University Museum, Sapporo, 060-0810 Japan; Department of Environmental Sciences, Faculty of Science, Ibaraki University, Mito, 310-8512 Japan |
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Abstract: | Luciobliviidae, a new family in the superfamily Gammaroidea (Amphipoda: Crustacea), is described on the basis of species in the genus Lucioblivio gen. nov. from subterranean waters of Japan. Mesogammaridae Bousfield, 1977 is rediagnosed; Octopupilla gen. nov. from subterranean waters of Japan is described and Eoniphargus (Uéno, 1955) from subterranean waters of Japan and Korea is included. The members of Lucioblivio , Octopupilla and Eoniphargus share several characters, including reduced eyes, a setose body, reduced coxae, feeble appendages and pedunculate coxal gills. To elucidate the phylogeny of the three genera among others, a sequence analysis of the 28S rRNA gene was conducted for 14 species in six families, including the three genera, from the superfamilies, Gammaroidea, Crangonyctoidea and Hadzioidea. The tree from a neighbour-joining analysis and the strict consensus tree from a maximum-parsimony analysis indicate monophyly of Mesogammaridae. Luciobliviidae is embedded within a clade of taxa belonging to the superfamily Gammaroidea. These results and the occurrence of gammarid-type calceoli in species of the new family indicate that Luciobliviidae should be placed within the superfamily Gammaroidea. © 2007 The Linnean Society of London, Zoological Journal of the Linnean Society , 2007, 149 , 643–670. |
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Keywords: | Gammaroidea molecular phylogeny new family new genera new species rDNA |
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