Leptopecten thompsoni (Maury, 1917)
MAURY, C. J. 1917. Santo Domingo Type Sections and Fossils. Part 1: Mollusca. Bulletins of American Paleontology, 5 (29): 166-415, pls. 1-39. [p. 352, pl. 34, figs. 9-10]
1917 Pecten thompsoni Maury, 1917
1917 Pecten ischnon Pilsbry & Johnson, 1917
1917 Pecten ischnon Pilsbry & Johnson, 1917
C. J. Maury, 1917, plate 34.
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«Shell thin, delicate, translucent, suborbicular, flattened, inequivalve; ribs eighteen or nineteen, rounded, a little wider than the interspaces, giving a characteristically fluted aspect to the valves; ribs and interspaces smooth except for very fine, raised, concentric growth striae; right valve exceedingly flattened with prominent ears, the anterior noticeably reflexed, deeply notched beneath and sculptured with about five radial riblets more or less squamose, especially that bordering the dorsal margin; a deep sulcus marks the junction of the ear with the umbonal region; posterior ear smaller, sub-triangular, its surface smooth except for concentric growth striae similar to those on the face of the valve; left valve also compressed but gently convex in the umbonal region; ears more nearly equal, the anterior with four to six radial threads and fine growth striae; the posterior smooth except for the striae. An average-sized sized right valve measures in length 20, altitude 18, semi-diameter 2; a left valve 18x17x3 mm. This species is readily distinguished by its flattened form, discrepant valves, and large, twisted right ear.
I take the greatest pleasure in naming this striking and graceful Pecten in honor of Dr. G. B. Thompson of Bizara, Pondoland East, South Africa, whose devotion to the advancement of the knowledge of the Cretaceous forms has been shown by his collections, made under most difficult circumstances along the wild and uninhabited coast of Pondoland. Locality.— (Exp'd'16) Bluff 3, Cercado de Mao. (Abundant and characteristic).» CARLOTTA JOAQUINA MAURY, 1917
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