Chapman, E.G., H. Piontkivska, J.M. Walker, D.T. Stewart, J.P. Curole & W.R. Hoeh. 2008. Extreme primary and secondary protein structure variability in the chimeric male-transmitted cytochrome c oxidase subunit II protein in freshwater mussels: evidence for an elevated amino acid substitution rate in the face of domain-specific purifying selection. BMC Evolutionary Biology 8. 16 pp. Available electronically.
(click the figure number to see the cladogram)
+-------------------------------------------- Pronodularia_japanensis
|
| +-- Quadrula_quadrula
--+ +--------------------------------------+
| | +-- Pustulosa_pustulosa
| |
+--+ +-- Pleurobema_sintoxia
| +-----------------------------------+
| | +-- Fusconaia_flava
+--+
| +----------------------------------- Amblema_plicata
| |
+--+ +-------------------------------- Plectomerus_dombeyanus
| |
+--+ +----------------------------- Popenaias_popeii
| |
+--+ +-------------------------- Toxolasma_lividum
| |
+--+ +----------------------- Obliquaria_reflexa
| |
| | +-- Cyrtonaias_berlandierii
+--+ +-----------------+
| | +-- Glebula_rotundata
| |
+--+ +-- Ptychobranchus_fasciolaris
| +--------------+
| | +-- Lemiox_rimosus
| |
+--+ +-- Venustaconcha_ellipsiformis
| +-----------+
| | +-- Obovaria_olivaria
+--+
| +----------- Hamiota_subangulata
+--+
| +-------- Lampsilis_ovata
+--+
| +----- Ortmanniana_ligamentina
+--+
| +-- Lampsilis_straminea
+--+
+-- Lampsilis_hydiana