Ajacicyathida

Ajacicyathida is a prehistoric order of sponges in the class Archaeocyatha. It was described in 1939, and is known from the Early Cambrian.^[1]

Ajacicyathida Temporal range: Early Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Porifera
Clade:	†Archaeocyatha
Order:	†Ajacicyathida Bedford and Bedford 1939
Suborders[1]
† Ajacicyathina Bedford and Bedford 1939 † Dokidocyathina Vologdin 1957 † Erismacoscinina Debrenne et al. 1989

Taxonomy

In addition to the suborders Ajacicyathina, Dokidocyathina, and Erismacoscinina, the following genera are placed incertae sedis within Ajacicyathida:^[1]

• †Botocyathus
• †Kidjasocyathus Rozanov 1960
• †Procyathellus
• †Ptretiosocyathus Rozanov 1966
• †Stephanicyathus Voronova et al. 1987