The stalk-eyed mud crab (Macrophthalmus hirtipes) is a marine large-eyed crab of the family Macrophthalmidae, endemic to New Zealand including Campbell Island.

[2] It grows to around 30 millimetres (1.2 in) shell width.

[2] It is either the only species in the subgenus Hemiplax[3] and the most basal species in the genus Macrophthalmus, or the only species in the sister genus Hemiplax.

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