Giribet, G. & D.L. Distel. 2003. Bivalve phylogeny and molecular data. [in] Lydeard & Lindberg, Molecular Systematics and Phylogeography of Mollusks: 45-90.
(click the figure number to see the cladogram)
+-- Neotrigonia_bednalli
+-----+
| +-- Neotrigonia_margaritacea
--+
| +----- Margaritifera_margaritifera
| |
+--+ +-- Elliptio_complanata
| |
+--+-- Lampsilis_cardium
|
+-- Unio_ravoisieri