Diadegma crassum is a wasp first described by Bridgman 1889. No subspecies are listed.Bridgman, J.B. (1889) Further additions to the Rev. T.A. Marshall's catalogue of British Ichneumonidae., Transactions of the Entomological Society of London. 1889:409-439.Taxapad Ichneumonoidea. Yu D.S.K., 2009-05-04
References