†Heteroptygmatis Shikama and Yui 1973 (snail)
Parent taxon: Opisthobranchia according to J. J. Sepkoski 2002
Sister taxa: Acanthotrophia, Acochlidea, Anaspidea, Bullinidae, Buscotypus, Canepina, Cephalaspida, Cephalaspidea, Cylindrobullinoidea, Echininus, Floribella, Gymnosomata, Heterostrophia, Kotakaia, Lutima, Mariottia, Mistostigma, Nicosiaella, Notaspidea, Nudibranchia, Pseudofusia, Reticulacella, Rhodopemorpha, Sacoglossa, Scorbinidola, Tectibranchiata, Thecosomata, Umbraculomorpha
Subtaxa: none
Ecology: epifaunal