From Kazlev & White, 2002 [“The Palaeos Site”]
<==o †Archaeocyatha Vologdin, 1937 [Cyathospongia Okulitch, 1935; Pleospongia Okulitch, 1935] †Hetairacyathida [incertae sedis] †REGULARES †Monocyathida †Capsulocyathida †Ajacicyathida †IRREGULARES †Thalassocyathida †Archaeocyathida †Kazakhstanicyathida
Reference(s):
- Kazlev, M. A. & White, A. T., 2002: Archaeocyantha.
–iNet: The Palaeos: http://www.palaeos.com/invertebrates/archaeocyantha/archaeocyantha.htm