Soroka, M. & A. Burzynski. 2018. Doubly uniparental inheritance and highly divergent mitochondrial genomes of the freshwater mussel Unio tumidus (Bivalvia: Unionidae). Hydrobiologia 810(1): 239-254. Available electronically.
(click the figure number to see the cladogram)
+-- Venustaconcha_ellipsiformis
+--------+
| +-- Quadrula_quadrula
|
--+ +-- Unio_tumidus
| +-----+
| | +-- Aculamprotula_tortuosa
+--+
| +----- Anodonta_anatina
+--+
| +-- Pyganodon_grandis
+--+
+-- Utterbackia_peninsularis
+-- Venustaconcha_ellipsiformis
+--------+
| +-- Quadrula_quadrula
|
--+ +-- Unio_tumidus
| +-----+
| | +-- Aculamprotula_tortuosa
+--+
| +----- Anodonta_anatina
+--+
| +-- Pyganodon_grandis
+--+
+-- Utterbackia_peninsularis