Bathycheilidae

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: †Trilobitomorpha
Classis: Trilobita
Ordo: Phacopida
Subordo: Calymenina
Superfamilia: Calymenoidea
Familia: Bathycheilidae
Genera: Bathycheilus - Calymenia - Eulomina
Name
Bathycheilidae Pribyl 1953

Bathycheilidae is a family of trilobites comprising the genera Bathycheilus, Calymenia and Eulomina.[1]
References

S. M. Gon III. "Order Phacopida". Archived from the original on 6 January 2011. Retrieved December 5, 2010.