Cryptophragmus is an extinct genus of sponges in the extinct family Aulaceratidae. Species are from the Ordovician of Australia, Canada (Ontario), China and the United States (Georgia, Virginia).
See also List of prehistoric sponge genera
References
The Rise, Development and Extinction of Stromatoporoids. Deyuan Dong, Palaeontologia Cathayana, pages 267–268,
External links