Mimachlamys bellicostata (Wood, 1861)
WOOD, S. V. 1861. A Monograph of the Eocene Bivalves. Vol 1. Paleontographical Society [Monograph, 1861-1871] [p. 38, pl. 8, figs. 11 a-b]
1850 Pecten subreconditus Orbigny, 1850 [nomen novum pro Pecten reconditus Sowerby, 1817]
1861 Pecten bellicostatus Wood, 1861
1905 Pecten bellicostatus var. orientalis Sokolov, 1905
1861 Pecten bellicostatus Wood, 1861
1905 Pecten bellicostatus var. orientalis Sokolov, 1905
S. V. Woods, 1861, plate 8.
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«Spec. Char. Testâ crassâ, aequivalvi, orbiculari vel lenticulari, aequilaterali, costatâ; costis 20-24 sub-rotundis, striatis et imbricatis; interstitiis lineatis et imbricatis; auriculis magnis, inaequalibus.
Shell thick and strong, equivalved, orbicular or lenticular, equilateral, costated; ribs 20 to 24 somewhat rounded, striated, and strongly imbricated; interspaces also with imbricated rays: auricles large and unequal, one costated, the other striated.
Diameter, 1 5/8ths of an inch. Locality.— Brockenhurst [Edwards). Our shell is a handsome one and highly ornamented, and, judging from the number of specimens in Mr. Edwards' cabinet, it does not appear to have been scarce. In addition to the above formula, it may be further noticed, that the centre of the elevated rib is not only strongly and regularly imbricated, but the imbrices are long, overlapping, and slightly projecting; they are not reflexed, but lie over each other like ornamental tiling; there is a smaller ray on each side of the centre one, which is also imbricated, and the two lines or rays on the interspaces are likewise covered with small imbrications. The auricle on the pedal side of the right valve is a very large one, and ornamented with about half a dozen costae, while the other is only striated with numerous rays; and the ears of the left valve are both striated; angle of divergence, 90°. The nearest approach to this species is P. Thorenti, D'Archiac, Tr. Geol. Soc. Fr., 2d sér., t. xi, pt, 1, p. 211, pl. 8, figs. 8, 8, a, b, which much resembles it in the ornament, but the auricle of that shell is so much smaller that I must presume the two to be different. The figure there taken was from a solitary specimen, and the auricle, if natural, does not appear to me to be perfect.» SEARLES VALENTINE WOOD, 1861
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