Hyotissa sinensis ( Gmelin, 1791:3335 )

Lam, Katherine, Morton, Brian & Leung, K. F., 2008, Shell-bearing Mollusca (Bivalvia and Gastropoda) from submarine caves in Hong Kong, Journal of Natural History 42 (9 - 12), pp. 927-952 : 934

Hyotissa sinensis ( Gmelin, 1791:3335)

( Figure 2G, H )

Description

Shell large, up to, 150mm in height, outline rounded to oval. Shell is thick and heavy in large individuals. Surface irregularly folded with radial ribs on both valves. Shell margin with irregular wavy plications corresponding to rib positions. Yellow and lavender colour morphs. Chomata in a vermiculate pattern are restricted to the anterior and posterior hinge margins. Shell interior white and covered by a layer of vesicular shell structure. The hinge line is straight and comparatively long. Adductor muscle scar large, circular and positioned on the posterior side of the shell.

Type locality

Sinae littora.

Distribution

Western Pacific from southern Japan, China’s coasts to the Philippines, northern Queensland, Australia ( Morris 1985). Eulittoral and sublittoral zones to 8–10 m and submarine caves.

Figures

Figure 2. A, Acar plicata, height×length57.2×12.9 mm; B, Arca avellana, heigh- t×length512.2×26.1 mm; C, Lithophaga malaccana, height×length517.7×7.87 mm; D, Modiolus comptus, height×length57.05×4.82 mm; E, Septifer bilocularis, heigh- t×length537.8×19.8 mm; F, Dendostrea crenulifera, height×length53.4×2.4 mm; G and H, Hyotissa sinensis (NHM 20030494), height×length5129×117 mm; I, Spondylus cf. anacanthus, height×length58.31×15.07 mm; J, Anomia chinensis, heigh- t×length52.4×2.4 mm; K, Pinctada martensii, height×length514.48×15.35 mm; L, Isognomon legumen, height×length528×14.77 mm; M, Vulsella vulsella, heigh- t×length564.19×32.96 mm; N, Ephippodonta oedipus, height×length50.51×3.25 mm; O, Mysella compacta, height×length51.84×4.5 mm; P, Claudiconcha japonica, heigh- t×length54.75×5.08 mm; Q, Hiatella orientalis, height×length511.9×13.1 mm.