Deltocyathoides Yabe & Eguchi, 1932

Diagnosis.

Corallum bowl-shaped, with rounded base, and calice circular in cross section; transverse division absent. Costae ridged and serrate; intercostal regions deep, narrow, and not pitted. Higher cycle costae (C3-4) originate by bi- or trifurcation. Septa hexamerally arranged in four complete cycles. Sub-lamellar to styliform pali before all but last cycles of septa. Columella papillose.

Type species.

Deltocyathoides japonicus Yabe & Eguchi, 1932a (junior synonym of Deltocyathus orientalis Duncan, 1876, which is the type of Paradeltocyathus by original designation) (Cairns 1997).