Bivalvia - Cardiida - Semelidae
Alternative spelling: Amphidesma
Parent taxon: Semele according to E. V. Coan et al. 2000
See also Bouchet et al. 2010 and Sepkoski 2002
Sister taxa: Semele (Elegantula), Semele (Semele), Semele anteriocosta, Semele australina, Semele bellastriata, Semele bolivarensis, Semele carinata, Semele casta, Semele chipolana, Semele claytoni, Semele diaboli, Semele flavescens, Semele hanleyi, Semele harveyensis, Semele jaramija, Semele junonia, Semele krauseana, Semele laevis, Semele linosa, Semele mekranica, Semele montesanoensis, Semele morani, Semele nelliana, Semele orbiculata, Semele paramutica, Semele perlamellosa, Semele proficua, Semele purpurascens, Semele radiata, Semele reagani, Semele sardonica, Semele sayi, Semele sparsilineata, Semele striosa, Semele subovata, Semele sylviaensis, Semele transversa, Semele vancouverensis, Semele vesiculosa, Semele willamettensis, Semele zuliana
Subtaxa: Amphidesma brevirostrum Amphidesma mississippiensis Amphidesma profunda Semele (Amphidesma) venusta
Distribution:
• Quaternary of United States (11: California collections)
• Oligocene of Panama (1), United States (1: Mississippi)
• Eocene of United States (2: Alabama)
Total: 15 collections each including a single occurrence