Carolinapecten gladensis (Mansfield, 1936)
MANSFIELD, W. C. 1936. Stratigraphic significance of Miocene, Pliocene and Pleistocene Pectinidae in the Southeastern United States. Journal of Paleontology, 10 (3): 168-192, pls. 22, 23. [p. 188, pl. 23, fig. 4]
1936 Pecten (Chlamys) gladensis Mansfield, 1936
W. C. Mansfield, 1936, plate 23.
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«Shell large, rather thick, nearly equilateral, longer than high. Ears subequal, slightly concave, sculptured mainly with rather closely spaced concentric lamellae. Middle of disk the highest part of the valve; away from the middle the surface gradually declines to the margins. Ribs 17 in number, rounded in outline, seoarated by spaces about as wide as the ribs; ribs, interspaces, and submargins without any visible subradials. The concentric lamellaecover the whole shell are rather widely spaced.
Dimensións of holotype: Left valve (U. S. Nat. Mus. 373077), length, 120 mm.; height, 101 mm.; convexity about 23 mm. The new species appears to be closely related to specimens dredged from Tampa Bay, just off shore opposite Vinoy Hotel at Petersburg, Florida, and identified by me as "Pecten eboreus" Say (8c); but it differscfrom the latter form in having a much larger, relatively longer and more equilateral shell. The general outline of the new species agrees closely with a left valve from the Pleistocene on North Creek at Asprey, Florida, referred by Dall (9j) to Pecten gibbus irradians Lamarck, but differs in haiving a larger shell with a loger umbonal area. No right valve of the new species is at hand for comparison. Type locality: Station 12923, thrown out of a ditch in the Everglade area about 18 miles south of Immokalee, Collier County, Florida. Collected by Clarence Simpson of the Florida Geological Survey. Horizon: Same horizon as the limestone of southern Florida, the fauna from wich was described by Mansfield (22) and referred to the Pliocene. The two specimens, probably left valves, from the type locality, although having squarer ribs, probably belong to the same new subspecies.» (22) MANSFIELD, W. C. Pliocene fossils from limestone in southern Florida: U. S. Geol. Survey, Prof. Paper 170, pp. 43-56, pls. 14-18, 1932. (a) p. 47, pl. 16, figs. 4, 6. (b) p. 17, pI. 17 , figs. 1-5. (c) p 47, pl. 16, 6gs. 3, 5. WENDELL CLAY MANSFIELD, 1936
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«A species of Carolinapecten that is present in the Ochopee Limestone, which I would identify as Carolinapecten gladensis (Mansfield, 1936), represents a more primitive evolutionary stage than the Carolinapecten eboreus watsonensis (Mansfield, 1936) reported by Ward (1992b) from Bed 11 at the APAC pit. The latter species was originally described from the lower Jackson Bluff Formation [Ecphora zone] of western Florida (Mansfield, 1936), which in turn has been correlated with the upper Yorktown Formation (Ward and Huddlestun, 1988). There is thus a suggestion that the Ochopee Limestone may represent the very earliest part of the Burwellian (M5) Molluscan Stage, perhaps falling within the half-million-year hiatus between the Sunken Meadow and Rushmere Members of the Yorktown Formation (Ward and Huddlestun, 1988).»
WALLER, T. R. 1996. Bridging the Gap between the Eastern Atlantic and Eastern Pacific: A New Species of Crassadoma (Bivalvia: Pectinidae) in the Pliocene of Florida. Journal of Paleontology, 70 (6): 941-946. [p. 942, 943]
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