Klishko, O., M. Lopes-Lima, E. Froufe, A.E. Bogan & V.Y. Abakumova. 2018. Unraveling the systematics of Nodularia (Bivalvia, Unionidae) species from eastern Russia. Systematics and Biodiversity 16(3): 287-301. Available electronically.
(click the figure number to see the cladogram)
+-------- Nodularia_breviconcha
+--+
| | +----- Nodularia_huana
| +--+
| | +-- Nodularia_douglasiae
--+ +--+
| +-- Nodularia_nipponensis
|
| +----- Unio_tumidus
| |
+-----+----- Unio_gibbus
|
| +-- Unio_nanus
+--+
+-- Unio_pictorum