*Images in development
Solenoidea
Beaks close to the anterior
Both margins straight or curved
Anterior margin lacking a sulcus
Posterior aperture oval in profile, articulated valves have dorsal edges parallel
Ensis siliqua
Posterior aperture lozenge shaped in profile, articulated valves have dorsal edges diverging
Ensis minor
Pallial sinus S-shaped, valves relatively broad (L:B = 6:1)
Ensis directus
Pallial sinus U-shaped, valves relatively narrow (L:B ≥ 8:1)
Valves strongly curved, narrow (L:B ≥ 8.5:1)
Ensis ensis