Marrone, F., G. Nardi, S. Cianfanelli, M. Govedič, S.A. Barra et al. 2019. Diversity and taxonomy of the genus Unio Philipsson in Italy, with the designation of a neotype for Unio elongatulus C. Pfeiffer (Mollusca, Bivalvia, Unionidae). Zootaxa 4545(3): 339-374. Available electronically.
(click the figure number to see the cladogram)
+-------------- Unio_tumidus
|
--+ +----------- Unio_delphinus
| |
+--+ +-------- Unio_foucauldianus
| |
+--+ +----- Unio_mancus
| |
| +----- Unio_elongatulus
+--+
+----- Unio_ravoisieri
|
| +-- Unio_pictorum
+--+
+-- Unio_terminalis