''Principapillatus'' is a

monospecific genus In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

velvet worm Onychophora (from grc, ονυχής, , "claws"; and , , "to carry"), commonly known as velvet worms (due to their velvety texture and somewhat wormlike appearance) or more ambiguously as peripatus (after the first described genus, '' Peripatus ...

containing the single species ''Principapillatus hitoyensis''. Males of this species have 26 to 29 pairs of legs, usually 27 or 28; females have 30 to 32, usually 30 or 31. This velvet worm is

viviparous Among animals, viviparity is development of the embryo inside the body of the parent. This is opposed to oviparity which is a reproductive mode in which females lay developing eggs that complete their development and hatch externally from the ...

, with mothers supplying nourishment to their embryos through a placenta. This species was discovered in Costa Rica.

References

Further reading