Euvola coralliphila (Olsson, 1922)
OLSSON, A. A. 1922. The Miocene of Nothern Costa Rica with notes on its general stratigraphic relations. Bulletins of American Paleontology, 9 (39): 1-460, pls. 1-32. [p. 199, pl. 17, figs. 5-6]
1922 Pecten coralliphila Olsson, 1922
A. A. Olsson, 1922, plate 17.
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«Shell small, very thin and generally translucent; broader than high; right valve moderately convex, the left concave with raised submargins; ears small and subequal; sculpture of the right valve of about 23 low, flat ribs, with flat interspaces a little more than ½ the width of the ribs; some of the ribs may become divided medially; the ribs of the left valve, about 20 in number, are narrow, usually somewhat irregularly spaced so that their interspaces are of variable width and new ribs may occasionally appear in the wider interspaces near the ventral margin; surface in addition finely sculptured with even, raised concentric threads; interior of the shell fluted well into the cavity of the shell, in harmony with the external ribs.
Length 34, height 29, semi-diameter 4 mm (right valve) This Pecten is fairly common in the coralline phases of the Miocene and its associated marls and sands. It is extremely thin and fragile in texture. Its sculpture resembles that of Pecten gatunensis Toula but is much more irregular. The interspaces of the left valve are of very variable width. Gatun Stage: Port Limon.» AXEL ADOLPH OLSSON, 1922
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