ドウケツエビ科の分類に関する研究の概説

概要

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An overview of the taxonomy of the stenopodidean shrimp family, Spongicolidae Schram, 1986 (Crustacea: De capoda) is provided. The family contains 34 described species of 6 genera: Globospongicola Komai and Saito, 2006, Microprosthema Stimpson, 1860, Paraspongicola de Saint Laurent and Cleva, 1981, Spongicola de Haan, 1844, Spongicoloides Hansen, 1908 and Spongiocaris Bruce and Baba, 1973. Only Microprosthema comprises free-living species in shallow rocky reefs, while shrimps of the other genera are primarily obligate symbionts of deep-water hexactinellid sponges, living in the atrium of hosts. Some of recent taxonomic studies are presented here. Larval development and geographic and bathymetric distributions of species are briefly discussed. The phylogenetic study clarified Microprosthema as the most basal genus, and Spongicoloides and Spongiocaris as the most derived genera among spongicolids. Decrease in number of gills and that of exopods on the second and third maxillipeds, and the loss of spiniation on carapace, pereopods and abdomen in the spongicolids (except for Microprosthema) were considered secondarily derived in relation to their sponge-associated habitat.
2008-02-20