Marine Biodiversity » Marine Sponges » Calcarea » Calcarea Classification » Subclass Calcaronea

Definition: Minute rounded sponges; ectosomal skeleton (exopinacoderm) consists of several layers of overlapping (not fused) triangular or rounded scales, derived from triradiate spicules; surface has a single osculum surrounded by several layers of quadriradiate spicules and diactines, and ostia surrounded by triradiates and microdiactinal spicules; choanosome lacks megascleres but has microquadriradiates scattered; basipinacoderm region (at the base of the sponge) has scales and triactines; tuning fork spicules or sagittal triactines never present; choanocytes with apical nuclei; larvae are amphiblastula.

Scope: A single genus

Reviews: Nil.

Genera:
Lepidoleucon Vacelet, 1967 (type species: Lepidoleucon inflatum Vacelet, 1967) - as for family.