Dyduch-Falniowska, A. & R. Koziol. 1989. Anatomical and conchological characters in the systematics of the Uionidae of Poland. Malakologische Abhandlungen, Staatliches Museum für Tierkunde Dresden 14(5): 35-52.
(click the figure number to see the cladogram)
+-- Pseudanodonta_complanata
+-----+
| +-- Anodonta_anatina
--+
| +----- Unio_pictorum
+--+
| +-- Unio_tumidus
+--+
+-- Unio_crassus