Figure 12 in Living together in dead coral rocks: macrosymbiotic communities associated with Bonellia echiuran worms (Annelida: Thalassematidae: Bonelliinae), involving new commensal bivalve and amphipod species

Figure 12. Basterotia bonelliphila (paratype NSMT-Mo 79471). A, B, External view of right and left valves. C, D, Internal view of right and left valves. E, F, Hinge structure of right and left valves. G, H, Prodissoconch II of right and left valves. Abbreviations: ac, anterior cardinal tooth; exl, external ligament; p2, prodissoconch II. Scale bars = 1 mm (A–D), 100 µm (E–H).