Holotype of Borniopsis mortoni (UMMZ 305035) (SL 4.1 mm). A, C, E Right valve B, D Left valve F, G Hinge structure of left and right valves. Abbreviations: aa, anterior adductor muscle; ac, anterior cardinal tooth; f, foot; gn, gonad; il, internal ligament; lid, inner demibranch of left side; pa, posterior adductor muscle; rid, inner demibranch of right side; st, stomach. Scale bars 1 mm. Photo credits: R. Goto: A–G.

 
 
  Part of: Goto R, Ishikawa H (2016) Borniopsis mortoni sp. n. (Heterodonta, Galeommatoidea, Galeommatidae sensu lato), a new bivalve commensal with a synaptid sea cucumber from Japan. ZooKeys 615: 33-45. https://doi.org/10.3897/zookeys.615.8125