- 2005 ?†Sphenoecium
Chapman & Thomas, 1936 ?†Yuknessia Walcott, 1919 †
Calyxhydra Kozlowski, 1959 †Chitinodendron Eisenack, 1937 †Cylindrohydra Kozłowski...
- Hydrozoa. Valid. †Axopora Hydrozoa. Valid. †Axoporella Hydrozoa. Valid. †
Cályxhydra Hydrozoa. Valid. †Cannostomites Scyphozoa. Valid. †Congregopora Hydrozoa...
-
Cephalodiscidae Kozłowski, 1967 ?Archaeocryptolaria
Rhabdopleuridae Chapman, 1919
Calyxhydra Rhabdopleuridae Kozłowski, 1959
Chitinodendron Rhabdopleuridae Eisenack...
