Isozoanthus

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Phylum: Cnidaria
Classis: Anthozoa
Subclassis: Hexacorallia
Ordo: Zoantharia
Subordo: Macrocnemina
Familia: Parazoanthidae
Genus: Isozoanthus

References

* Swain, T.D. 2009: Isozoanthus antumbrosus, a new species of zoanthid (Cnidaria: Anthozoa: Zoanthidea) symbiotic with Hydrozoa from the Caribbean, with a key to hydroid and sponge-symbiotic zoanthid species. Zootaxa, 2051: 41-48. PDF