Species:
Tetrapygus niger >
Genus:
Tetrapygus >
Family:
Arbaciidae >
Order:
Arbacioida >
Subterclass:
Echinacea >
Infraclass:
Carinacea >
Subclass:
Euechinoidea >
Class:
Echinoidea >
Subphylum:
Echinozoa >
Phylum:
Echinodermata >
Kingdom:
Animalia >
Unranked:
Biota >