Cyclopecten subhyalinus (E. A. Smith, 1885)
SMITH, E. A. 1885. Report on the Lamellibranchiata collected by H.M.S. Challenger during the years 1873-76. In C. W. Thomson & J. Murray: Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876. Zoology, 13: 1-341, pls. 1-25 [p. 304, pl. 22, figs. 2, 2a]
1885 Pecten subhyalinus E. A. Smith, 1885
E. A. Smith, 1885, plate 22.
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«Testa compressa, tenuissima, vitrea, nitida, aliquanto inaequivalvis; valva sinistra paulo convexior, fere laevis, striis paucis concentricis aliisque radiantibus sculpta; valva dextra striis concentricis regularibus ornata. Auriculae inaequales, bene definitae, anticis paulo majoribus, illa valvae dextrae radiatim lirata, mediocriter profunde sinuata. Margo valvae infra sinum rectilinearis, haud denticulatus.
Length 7 mm., height 7½, diameter 2.
Habitat.— Station 310, off the west coast of Southern Patagonia, in 400 fathoms. This species belongs to the same group as Pecten vitreus (Chemnitz), from which it differs both in sculpture and form. In that species the posterior auricles are scarcely defined, whilst in the present form there is a well marked umbonal rectilinear ridge, from the apex to the side margin. The anterior umbonal slope in that species is incurved and toothed, in this it is straight and edentulous.» EDGAR ALBERT SMITH, 1885
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