Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Echinodermata
Subphylum: Eleutherozoa
Superclassis: Cryptosyringida
Classis: Echinoidea
Subclassis: Euechinoidea
Superordo: Atelostomata
Ordo: Cassiduloida
Familia: Apatopygidae
Genera (2 + 2†): Apatopygus – †Jolyclypus – †Nucleopygus – Porterpygus
Name
Apatopygidae Kier, 1962: 222
Type genus: Apatopygus Hawkins, 1920, by monotypy.
References
Primary references
Kier, P.M. 1962. Revision of the cassuloid echinoids. Smithsonian Miscellaneous Collections 144(3): 262 pp. + 44 pl. BHL
Links
Apatopygidae in the World Register of Marine Species
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