Lituyapecten dilleri (Dall, 1901)
DALL, W. H. 1901. A new Lyropecten. The Nautilus, 14 (10): 117-118 [p. 117]
1901 Pecten (Lyropecten) dilleri Dall, 1901
Pecten (Patinopecten) dilleri Dall; R. Arnold, 1906, The Tertiary and Quaternary pectens of California, plate 5, figure 2.
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«Shell large, rather compressed, nearly orbicular with a relatively short, straight hinge-line, dorsally rectangular, nearly smooth, subequal ears, the posterior with three small riblets; a well marked though shallow byssal fold; and moderately thick valves. The right valve is somewhat more convex and strongly sculptured, bearing 29-30 high, narrow, T-rail-shaped ribs, flattened above, overhanging narrower, deep, nearly smooth channels; and with marked concentric imbrication, feeble on top of the ribs but articularly scaly at their sides. The sculpture of the left valve is less pronounced, hidden in the matrix, but apparently similar. Alt. 192, lat. 175, diam. about 35 mm. The lateral edges are slightly defective, the submargins very narrow.»
WILLIAM HEALEY DALL, 1901
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