†superfamily Tropidodiscoidea Knight 1956 (snail)
Full reference: J. B. Knight. 1956. New families of Gastropoda. Journal of the Washington Academy of Sciences 46(2):41-42
Parent taxon: Bellerophontida according to P. J. Wagner 2011
Sister taxa: Atlantobellerophon, Bellerophontina, Cloudina, Euphemitella, Lenticularis, Mirochiliticus, Pseudowarthia, Rotadiscoides, Siluracmaea, Squarrosus
Subtaxa: Tropidodiscidae
Ecology: slow-moving low-level epifaunal detritivore