†Gammadiscus (snail)
Parent taxon: Bellerophontida according to J. J. Sepkoski 2002
Sister taxa: Atlantobellerophon, Bellerophontina, Cloudina, Euphemitella, Lenticularis, Mirochiliticus, Pseudowarthia, Rotadiscoides, Siluracmaea, Squarrosus, Tropidodiscoidea
Subtaxa: none
Ecology: slow-moving low-level epifaunal detritivore