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Hypothalassia acerba
''Hypothalassia acerba'' is a large crab found in the muddy substrates of the deep seas off the southwestern Australian and New Zealand coasts. Australian distribution, which is correlated to depth and temperature, ranges from a latitude as far north as approximately 27° S on the west coast, southwards, then eastwards on the south coast to a longitude of at least 129° E. The species usually occurs in waters with temperatures of and in depths ranging of on the lower west coast and on the south coast. Body size is inversely related to depth of water. There are only two species in the genus ''Hypothalassia'', and ''H. acerba'' is not the same ''champagne crab'' as the other ''Hypothalassia'' species, ''H. armata'', which is found in Japanese waters.〔
==Description==
The species has well-defined groves on a hexagonal carapace, with a smooth dorsal surface and a spiny anterior surface. Carapace width is 150 mm. Their branchial openings are partially covered by maxillipeds, and have asymmetrical chelipeds with stiff, brown-black spines of various sizes on their walking legs. The frontal region is beige-cream and covered in many short setae. Walking legs have a dactylus of 3.7–4.3 times as long as wide.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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