FIGURE 2 in The genera that never were: The impact of Janeia and Janacekia on phyletic and taxonomic relations within the Solemyidae (Bivalvia: Protobranchia)

FIGURE 2. Comparative internal views of the posterior portion of the right valves of Acharax (A) and Solemya (B) showing character states of the nymphae, internal buttresses and posterior adductor scars. In Acharax the nymph (ne) is external, the condition of the internal buttress is simple (bts), and the condition of the posterior adductor muscle scar is entire (pae). In Solemya, depression of the nymph to a submarginal position (ns) results in a compound buttress (btc) and an occluded posterior adductor scar (pao).