"Aequipecten" asmariensis Eames & Cox, 1956
EAMES, F. E. & L. R. COX. 1956. Some Tertiary Pectinacea from East Africa, Persia, and the Mediterranean region. Proceedings of the Malacological Society of London, 32 (1): 1-68, pls. 1-20. [p. 11, pl. 2, figs. 3a-3d]
1956 Chlamys (Aequipecten) asmariensis Eames & Cox, 1956
F. E. Eames & L. R. Cox, 1956, plate 2.
|
«Material:— Sample X'88.15 (Tang-i-Gel-i-Turush, Kuh-i-Asmari; Brissopsis Beds, top 20 ft. (Oligocene)), the holotype (L.86067).
Description:— Of small-medium size, suborbicular, right valve possibly a little more inflated than the left valve. Postero-dorsal margin of body straight, antero-dorsal margin concave (the concavity exaggerated by crushing), the angle of divergence increasing from 92° to about 107°. Posterior ears triangular, approximately right-angled, with 5 or 6 rather fine, slightly crenulated, moderately widely-spaced threails; left anterior ear approximately right-angled, with 7 distinct, scaly threads; right anterior ear with 6 solid, scaly threails. Byssal sinus moderately deep; ctenolium obscured by crushing. 25-26 ribs, the posterior 2 or 3 finer than the remainder, solid, at least one and a half times as wide as their intervals, rounded, becoming slightly flattened near the ventral margin, where they may bear a shallow longitudinal groove; fine concentric scales, 3 or 4 to the mm., are preserved on the ribs near the ventral margin; intervals smooth. Dimensions:— H = 16.7 mm. L = 17.5 mm. Td (slightly crushed) = 6.1 mm. Remarks:— Chlamys multicarinata (Lamarck) as figured by Cossmann and Pissarro (12, Pl. 40, fig. 131-10), from the Lutetian of the Paris Basin, has rather finer and less sirnple ribs, and is normally higher. C. halaensis Frauscher (27, Pl. 6, fig. 7), from the L. Eocene of the northern Alps, is larger and has more numerous ribs. Pecten solariolum Mayer-Eymar (39, Pl. 14, fig. 5), from the Eocene of Egypt, is larger and less explanate, and has simple ribs. Pecten veniliae Mayer-Eymar (38, Pl. 6, fig. 11), from the Bartonian of the Alps, has rather ferver, simple, and more nodular ribs.» FRANK EVELYN EAMES & LESLIE REGINALD COX, 1956
|