Pecten awajiensis Pilsbry, 1905
PILSBRY, H. A. 1905. New Japanese marine Mollusca. Proceedings of the Academy of Natural Sciences of Philadelphia, 57: 101-122, pls. 2-5. [p. 121]
«Pecten awajiensis n. sp.
Shell solid, equilateral, both valves moderately convex, the right valve less so; lower half semicircular, the upper half straightly tapering. Convex valve dull purplish-white with purple-brown clouding and a few small white spots in the furrows. The other valve is light brown with some darker zones, and more white in the grooves. Ears large, the posterior slightly longer. Ribs 17, high and rounded, and slightly wider than the intervals in the left valve, decidedly so in the right, where their margins slightly overhang the intervals. Growth-striae fine, close and inconspicuous. Ears finely costellate. Anterior and posterior dorsal surfaces of the main disk flattened and smoothish. Interior white and strongly grooved, calloused above the muscle scar. Ctenolium short, of five teeth. Length 48.6, height 47, diam. 14.5 mm.; length of the hinge-line 33 mm. Fukura, Awaji. Type No. 88,300, A. N. S. P., from No. 1,636 of Mr. Hirase's collection. This species is related to P. singaporinus Sowb. (Thes. Conch., I, PI. 14, fig. 71), from which it differs chiefly by the much coarser and less numerous ribs, 17 instead of 23 or 24. The dorsal half of the shell is also more wedge-shaped than in the Singapore scallop, of which a topotype is before me.» HENRY AUGUSTUS PILSBRY, 1905
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