Calcaronea

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Parazoa
Phylum: Porifera
Classis: Calcarea
Subclassis: Calcaronea
Ordines: Baeriida - Leucosoleniida - Lithonida

References

* Borojevic, R.; Boury-Esnault, N.; Vacelet, J. 2000: A revision of the supraspecific classification of the subclass Calcaronea (Porifera, class Calcarea). Zoosystema, 22(2): 203-263. [1]