Pecten (Pecten) barretti Woodring, 1925
WOODRING, W. P. 1925. Miocene mollusks from Bowden, Jamaica. Pelecypods and scaphopods. Carnegie Institution of Washington Publication 366: 222 pp. [p. 62, pl. 7, figs. 6, 7]
«Pecten (Pecten) barreti, new species
(Plate 7, Figures 6, 7) Pecten (Pecten) soror Dall (part, not Gabb, 1898, Trans. Wagner Free Inst. Sci. Philadelphia, voI. 3, part 4, p. 712.
The following is a description of this species: Shell large; dorsal margins slightly concave, diverging at an angle of about 95º; right valve strongly inflated, sculptured with 19 to 22 high, almost square ribs, their edges and tops slightly rounded, separated by narrower, deeply channaled interspaces; in the interspaces and on the flanks of the ribs are obscure, fine, sIightly raised concentric lamellae; left valve slightly concave, sculptured with the same number of narrower square ribs, and deep, flat interspaces of the same width or slightly wider; concentric lamellae more prominent than on right valve and occasionally extending across ribs, but Iess conspicuous on ribs than in interspaces; submargins relatively wide and forming a deep ledge on left valve; auricles subequal, sculptured with weak radial ribs and fine concentric lamellae; interior ventral margin deeply fluted. Left valve: length 50 mm.; height 45 mm.; length of hinge 25 mm. Immature right valve: length 32 mm.; height 29.5 mm.; diameter 7 mm.; length of hinge about 13 mm. P. barretti resembles P. soror (Gabb ), described from the Dominican Republic, where it has been collected from both the Cercado and Gurabo formations. The Bowden epecies has less concave dorsal margins; the right valve has fewer and more rectangular ribs, narrower interspaces, and less conspicuous concentric lamellae; the left valve has more rectangular ribs and more strongly sculptured auricles. None of the valves of P. barretti is in attached position and the right and left valves here described may possibly belong to different species. Type material.— Holotype (right valve, U. S. Nat. Mus. No. 352776); paratype (left valve. U. S. Nat. Mus. No. 352777).» WENDELL PHILLIPS WOODRING, 1925 |
W. P. Woodring, 1925, plate 7.
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