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Cancrocaeca
''Cancrocaeca xenomorpha'' is a species of troglobitic (cave-dwelling) freshwater crab from Sulawesi, the only species in the monotypic genus ''Cancrocaeca''. It has been described as the world's "most highly cave-adapted species of crab".〔 ==Description== ''Cancrocaeca xenomorpha'' is a small crab with long legs. It has no eyes or even vestiges of eyestalks, and has only vague depressions where the orbits of the eyes might be expected; this is the greatest degree of ocular degeneration of any crab.〔 The carapace is rounded in outline, without any rostrum, and is slightly wider than it is long.〔 The five pairs of legs are very long, at up to 3.7 times the width of the carapace in length.〔 Females are slightly larger than males, at up to across the carapace, compared to for males. Females also appear to be a darker colour, but only because of the presence of mud particles on the carapace; both sexes are naturally unpigmented.〔
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「Cancrocaeca」の詳細全文を読む
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