Cyclopecten leptaleus (Verrill, 1884)
VERRILL, A. E. 1884. Second Catalogue of Mollusca recently added to the Fauna of New England Coast and the adjacent parts of the Atlantic, consisting mostrly of Deep Sea Species, with Notes on others previosusly recorded. Transactions of the Connecticut Academy of Arts and Sciences, 6 (1): 139-294. [p. 232]
1884 Pecten leptaleus Verrill, 1884
Cyclopecten leptaleus Verrill; A. E. Verrill & K. J. Bush, 1898, Revision of the deep-water Mollusca of the Atlantic coast of North America, with descriptions of new genera and species, plate 85, figure 1.
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«Shell small, thin, delicate, well rounded, resembling P. pustulosus in form, but with much finer sculptnre. The umbos small, pointed. The anterior ear is prominent with a rather deep, rounded notch in the upper valve and a narrower and deeper notch in the lower valve; the posterior ear is small and short. The sculpture on the upper valve consists of numerous, thin, rather close, concentric riblets which become fewer and less elevated toward the umbos of which the most prominent part is nearly smooth; these concentric lines continue over the ears, becoming qnite prominent on the anterior ear, but fine and close on the posterior one. The intervals between the concentiic lamellae are crossed by numerous, very thin, raised lines which become obsolete on the umbos, and nearly so on the anterior ear. These radiating lines in crossing the concentric lamellae form minute, rounded granules which are most distinct on those near the margin, where they are very numerous, appearing like strings of minute beads along the lamellae. The lower valve is smaller and less convex than the upper, with the outer portion of its margin bent downward. The sculpture consists only ol a very fine, close, concentric lines, except on the ears which are covered with numerous, close, radiating lines, which are roughened by the concentric lines. Color yellowish white.
Length, 7 mm; height from ventral margin to dorsal edge, (6.5 mm; length of dorsal margin, 1mm. Two specimens were taken, off (Cape Hatteras, at station 2109, in 142 fathoms (No. 38,413).» ADDISON EMERY VERRILL, 1884
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