The stalk-eyed mud crab Macrophthalmus hirtipes is a marine large-eyed crab of the family Macrophthalmidae endemic to New Zealand including Campbell Island. It grows to around 30 millimetres (1.2 in) shell width. It is either the only species in the subgenus Hemiplax and the most basal species in the genus Macrophthalmus or the only species in the sister genus Hemiplax.
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