FIGURE 9. Turneroconcha magnifica n in A new genus Turneroconcha (Bivalvia: Vesicomyidae: Pliocardiinae) for the giant hydrothermal vent clam 'Calyptogena' magnifica

FIGURE 9. Turneroconcha magnifica n. comb. (Boss & Turner, 1980), Scanning electron micrographs of anatomical details, RV Western Flyer, dive D754, L=36 mm (IORAS, BIV00036-2) (A–K). A–C, transverse sections of distal parts of inner demibranch in the medial area showing interlamellar septa and lateral view of filaments. D, transverse section of filaments and interlamellar septa consisting of two plates of bacteriocytes, fusion of neighbouring plates creating dorsal wall of tubule arrowed. E, abfrontal surface of filaments. F, G, abfrontal surface of filaments with interlamellar septa. H, lateral view of filament and distal part of interlamellar septum. I, interlamellar septum showing a fragment of a tubule. J, frontal surface of filaments. K, lateral view of filament. RV Western Flyer, dive D752, L=104 mm. L, spermatozoids. acr, acrosome; fi, gill filament; fms, free margin of interlamellar septum; frc, frontal cilia; ifj, interfilamental junction; ils, interlamellar septum; lfc, latero-frontal cilia; lc, lateral cilia; mi, mitochondria; tb, boundaries between separate tubules; tub, tubule. Scale bars: A–C, E–G, 200 µm; D, H–J, 50 µm; K, 20 µm; L, 1 µm.