Infraclass Heteroconchia Gray 1854
Parent taxon: Autobranchia according to J. G. Carter et al. 2011
See also Bieler and Mikkelsen 2006, Bouchet et al. 2010, Giribet and Wheeler 2002, Scholz et al. 2008 and Ward 1992
Sister taxa: Cercomyidae, Pteriomorphia, Cardiolarioidea
Subtaxa: Archiheterodonta Cardiomorphi Eoastartella Heterodonta Heterodonta Lipanellidae Palaeoheterodonta Parenia Paullia Uniomorphi