Rosenberg, G., G.S. Kuncio, G.M. Davis & M.G. Harasewych. 1994. Preliminary ribosomal RNA phylogeny of gastropod and unionoidean bivalve mollusks. Nautilus Supplement 2: 111-121. Available electronically.
(click the figure number to see the cladogram)
+----------- Cumberlandia_monodonta
|
| +-- Margaritifera_falcata
+--------+
| +-- Margaritifera_margaritifera
|
--+ +-------- Gonidea_angulata
| |
| | +-- Elliptio_complanata
| | |
| | +-- Fusconaia_cerina
| | |
+--+ +--+-- Plectomerus_dombeyanus
| | |
| | +-- Pleurobema_cordatum
| | |
| | +-- Unio_pictorum
| |
| | +-- Pyganodon_cataracta
+--+ |
| +-- Pyganodon_grandis
| |
| +-- Utterbackia_imbecillis
| |
| +-- Lampsilis_teres
| |
| +-- Lampsilis_straminea
+--+
+-- Megalonaias_nervosa
|
+-- Obliquaria_reflexa
|
+-- Theliderma_cylindrica
|
+-- Quadrula_quadrula
|
+-- Uniomerus_tetralasmus