Classification Bieler, Carter & Coan (2010) list this taxon as a clade with unspecified rank between superorder and order, and the Bivalve Tree of Life as a superorder.
For being more practical and avoiding the multiplication of ranks, we will conserve here the traditional ranking of Pteriomorphia, Palaeoheterodonta and Heterodonta as subclasses although we acknowledge (as "alternate representation) a clade Autobranchia (=Autolamellibranchiata) including (Pteriomorpha (Palaeoheterodonta, Heterodonta)).
Citation: Gofas, S. (2014). Heterodonta. In: Froese, R. and D. Pauly. Editors. (2014) FishBase. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216 on 2015-01-25