Chlamys (Plagioctenium) concinnatus Woodring, 1925
WOODRING, W. P. 1925. Miocene mollusks from Bowden, Jamaica. Pelecypods and scaphopods. Carnegie Institution of Washington Publication 366: 222 p., pls. 1-28. [p. 70, pl. 8, fig. 8]
«Chlamys (Plagioctenium) concinnatus, new species
(Plate 8, Figure 8.) The folowing is a description of this species:
Shell medium-sized, slightly inequilateral; left valve moderately inflated, sculptured with 17 strong, almost flat-topped ribs, separated by interspaces of virtually same width as ribs; concentric sculpture consisting of fine sharply raised lamellae, overrriding ribs except on lower half of shell; lamellae arched on interspaces, with the convex side toward ventral margin; submargins sculptured with concentric lamellae, finer than those on disk; auricles subequal, radially and concentrically sculptured; cardinal crura prominent; right valve not known. Left valve: length 14.5 mm.; height 14.7 mm.; diameter 2.6 mm.; length of hinge 7.5 mm. This species is known only from the holotype, a left valve. The strong, subrounded radial ribs and conspicuous concentric lamellae over the entire surface of the disk, except on the lower part of the ribs, distinguish it from other Bowden Plagiocteniums Type material.— Holotype (left valve, U. S. Nat. Mus. No. 352784).» WENDELL PHILLIPS WOODRING, 1925
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W. P. Woodring, 1925, plate 8.
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