Euvola codercola (Harris in Hodson et al., 1927)
HODSON, F., H. K. HODSON & G. D. HARRIS. 1927. Some Venezuelan, and Caribbean mollusks. Bulletins of American Paleontology, 13 (49): 1-80, pls. 1-40. [p. 23, pl. 13, fig. 3; pl. 14, figs. 1, 5; pl. 15, fig. 7]
1927 Pecten soror codercola Harris in Hodson et al., 1927
F. Hodson, H. K. Hodson & G. D. Harris, 1927, plates 13-15.
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«Shell of moderate size, concave-convex; with about 19 well-defined costas on each valve with 2 or 3 less-developed marginal ones; right valve concave centrally, but with uplifted margins fore and aft dorsally ; wing with three strong and one or two additional radii ; ear with less-pronounced markings; both ear and wing nearly right-angled at the hinge terminations; fine slightly imbricated lines pass concentrically over the whole exterior surface; interiorly the muscular scar is definitely marked above, indefinitely below, pit well marked, on either side of which, just below the dorsal hinge margin, there are radiating, tooth-like laminae; right valve, when well developed and well preserved, shows an anterior ear somewhat bent out over the shell margin, ornamented with 6 radii much wider than their interspaces; below the ear, the shell margin is somewhat abruptly bent inward and carries fine radiating striae, below which the regulai' ribbing commences, with small ribs at first, increasing to the fifth which is of normal size; posterior wing and margin very similarly ornamented, though the number of small-sized ribs is but two or three; whole surface finely engraved with slightly imbricated concentric lines, but these are often worn off on the summits of the ribs; each rib characterized, basally at least, by a median depression, hence giving- a somewhat bifid appearance; at the very basal margin, somewhat unusually wellpreserved specimens show that there is a tendency to form another channel on the rib and hence produce a fine, raised, secondary rib upon the primary.
The exact relationship of this form to soror cannot be stated without access to better material from Santo Domingo than we have at present, or without much more detailed descriptions of the species. The size of this subspecies with dimensions extending to about 70 mm., whereas soror has no recorded dimension of over 47 mm.; the clearly defined grooving of the ribs in the right valve, and the more clearly defined radii on ear and wing tend to make this a fairly distinct variety. This species is analogous to the West coast P. stearnsii Dall. Age: Miocene and Pliocene. Locality: Districts of Democracia and Colina, State of Falcón, locality numbers 69, 123.» GILBERT DENNISON HARRIS IN F. HODSON ET AL., 1927
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