- Onychophora, class Onychophora - enigmatic small elongated wormlike terrestrial invertebrates of damp dark habitats in warm regions; distinct from the phylum Annelida; resemble slugs with legs and are sometimes described as the missing link between arthropods and annelids
--1 is a kind of class
--1 is a member of Arthropoda, phylum Arthropoda
--1 has members:onychophoran, velvet worm, peripatus; Peripatidae, family Peripatidae; Peripatopsidae, family Peripatopsidae