I saw that this page was deleted in 2006:
21:16, 26 April 2006 Keith Edkins (Talk | contribs) deleted "Hymenogastraceae" (Not part of current classification)
I don't think it is accurate to say that it is not part of the current classification. This is a newly created family, so it won't be in many books yet, however it is real.
Soon, all the hallucinogenic members of Psilocybe will be moved to the Hymenogastraceae due to recent phylogenetic research. 
- Matheny PB, et al. 2006. Major clades of Agaricales: a multi-locus phylogenetic overview. Mycologia 98:982–995.