- Tardigrada, class Tardigrada - in some classifications considered a separate phylum: microscopic arachnid-like invertebrates living in water or damp moss having 4 pairs of legs and instead of a mouth a pair of stylets or needle-like piercing organs connected with the pharynx
--1 is a kind of class
--1 is a member of Arthropoda, phylum Arthropoda
--1 has members: tardigrade