Pecten (Aequipecten) kikaiensis Nomura & Zinbô, 1934
NOMURA, S. & N. ZINBÔ. 1934. Marine Mollusca from the "Ryûkyû Limestone" of Kikai-zima, Ryûkyû Group. Science Reports of the Tohoku University [2nd. Series - Geology], 16 (2): 109-164, pI. 5. [p. 153, pl. 5, figs. 9a, 9b]
«Pecten (Aequipecten) kikaiensis n. sp.
Pl. V (I), Figs. 9a, b.
Shell small, inflated, nearly circular in outline, more or less oblique being slightly produced posteriorly; sides of the disk sloping, the anterior being shorter than the posterior; apical angle about 110°; test rather solid. Right valve sculptured with 18 radiating ribs which are in general subsequently divided into three riblets; entire surface of disk covered with minute, close-set scales. Ears rather small, very unequal, the anterior narrower but much longer than the posterior and ornamented with five radial, subnodose riblets with a deep bysal notch below. Interior of valve radially ribbed in harmony with the external sculpture. Left valve nearly similar to the right, but seemingly less convex and with less unequal ears.
Several specimens assigned to this species were examined. A right valve measuring 16 mm. in length, 16.5 mm. in height, 5.5 mm. in depth and 9.5 in lenth of ears was chosen for the type. Reg. No. 50357. The dimensions of some paratype specimens are: This species is related to Aequipecten martini COSSMANN ¹ from the Pliocene of Karikal, but distinguished from that species in having a more inflates beak and higher disk.»
¹ COSSMAN: Jour. de Conchyl. Vol. 68, p. 90, Pl. 3, 14; Pl. 4, figs. 1, 2, 1923.
SITIHEI NOMURA & NOBORU ZINBÔ, 1934
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S. Nomura & N. Zinbô, 1934, plate 5.
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