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The family Homolidae, known as ''carrier crabs''〔(Family Homolidae - carrier crabs ) at sealifebase.org〕 or ''porter crabs'',〔(Family Homolidae (Porter crabs) ) at the (Marine Species Identification Portal )〕 contains 14 genera of marine crabs. They mostly live on the continental slope and continental shelf, and are rarely encountered.〔 Members of the Homolidae have their fifth pereiopods (last pair of walking legs) in a sub-dorsal position, which allows them to hold objects in place over the rear half of the carapace. The objects carried include sponges, black corals and gorgonians, and this is behaviour may be a defence mechanism against predators.〔 Some species have been observed carrying living sea urchins in a symbiotic relationship which allows them to benefit from the protection of the urchin's dangerous spikes.〔(Relationships on the Reef )〕〔(Carrier Crab video ), National Geographic〕 ==Genera== A total of 14 genera are currently recognised in the family: *''Dagnaudus'' Guinot & Richer de Forges, 1995 *''Gordonopsis'' Guinot & Richer de Forges, 1995 *''Homola'' Leach, 1816 *''Homolax'' Alcock, 1899 *''Homolochunia'' Doflein, 1904 *''Homologenus'' A. Milne-Edwards, in Henderson, 1888 *''Homolomannia'' Ihle, 1912 *''Ihlopsis'' Guinot & Richer de Forges, 1995 *''Lamoha'' Ng, 1998 *''Latreillopsis'' Henderson, 1888 *''Moloha'' Barnard, 1947 *''Paromola'' Wood-Mason & Alcock, 1891 *''Paromolopsis'' Wood-Mason & Alcock, 1891 *''Yaldwynopsis'' Guinot & Richer de Forges, 1995 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Homolidae」の詳細全文を読む スポンサード リンク
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