Chlamys egregius (Nomland, 1917)
NOMLAND, J. O. 1917. The Etchegoin Pliocene of Middle California. University of California Publications, Bulletin of the Department of Geological Sciences, 10 (14): 191-254, pls. 6-12. [p. 231, pl. 6, figs. 3, 3a, 3b]
1917 Pecten egregius Nomland, 1917
J. O. Nomland, 1917, plate 6.
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«Type specimen no. 11090, Univ. Calif. Coll. Invert. Palae.
Shell equilateral, equivalve, thin, rather compressed; with smooth, regularly rounded base. Dorsal margins long; umbonal angle about 70 degrees. Right valve with about 22-23 moderately strong, rounded ribs; in each interspace there is one small, often invisible, rounded riblet; anterior ear long, arcuate in front, ornamented above byssal notch by about six distinct, radiating ridges and numerous incremental lines; byssal notch well defined; posterior ear very small, sculptured by low radiating ridges and inconspicuous incremental lines. Left valve with about 22 subequal ribs, which are not so prominent as those of the right valve, but with auxiliary riblets more distinct; anterior ear large, with sculpture consisting of faint incremental lines and about twelve radiating ridges; posterior ear similar to that on the right valve. Dimensions of type, which is a rather small specimen: height, 31 mm.; width, 24 mm.; width of hinge, 13 mm.
Occurrence.— At localities 2991, 2975, Pecten coalingensis zone, upper Etchegoin Pliocene.» JORGEN O. NOMLAND, 1917
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