Speleoperipatus is a monospecific genus of velvet worm in the family Peripatidae, containing the single species Speleoperipatus spelaeus. This species is a pale greenish yellow, almost white, with 19 to 23 pairs of legs and no eyes. Specimens range from 27 mm to 34 mm in length. The minimum number of leg pairs found in this species (19) is also the minimum number found in the family Peripatidae. This velvet worm is viviparous, with mothers supplying nourishment to their embryos through a placenta.

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