Argopecten ericellus (Hertlein, 1929)
HERTLEIN, L. G. 1929. A new Pecten from the San Diego Pliocene. Proceedings of the California Academy of Sciences, 23 (5): 215, pl. 24. [p. 225, pl. 24, figs. 10, 11]
1929 Pecten (Plagioctenium) ericellus Hertlein, 1929
L. G. Hertlein, 1929, plate 24.
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«Shell small, moderately convex; hinge line straight. Right valve ornamented by about 22 subrounded, fairly low radiating ribs which are separated by narrower interspaces; two tiny midribs are present along the base of the sides of the major ribs; ribs and interspaces crossed by concentric lines of growth; anterior and posterior margins ornamented by concentric lines of growth; ventral margin rounded; ears unequal, the anterior with a well-defined byssal notch, and sculpture of about five or six radiating riblets crossed by incremental lines; the posterior ear sculptured by about four or five radiating riblets crossed by lines of growth, no notch present. Altitude 28 mm.; longitude 29.1 mm.; diameter of right valve approximately 7.5 mm.; apical angle in right valve approximately 94°.
Holotype: No. 2998, Mus. Calif. Acad. Sci., from Loc. 1132 (C. A. S.), Pacific Beach, San Diego, California, C. H. Sternberg collector; San Diego, Pliocene. This interesting little species differs from P. invalidus Hanna, and P. circularis Sowerby, in its numerous low, more rounded, narrower ribs and in the possession of fine secondary ribs along the base of the sides of the major ribs. This species is named for the late Eric Knight Jordan». LEO GEORGE HERTLEIN, 1929
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