Antillipecten alumensis (Dall, 1898)
DALL, W. H. 1898. Contributions to the Tertiary fauna
of Florida. Silex Beds of Tampa and the Pliocene Beds of the Caloosahatchie
River. Part IV. I. Prionodesmacea: Nucula to Julia. 2. Teleodesmacea: Teredo to
Ervilia. Transactions of the Wagner Free Institute of Science of Philadelphia,
3 (4): viii, 571-947 p., pls. 23-35 (pls. 36 and 37 in part 5, 1890). [p. 740, pl. 34, figs. 10-11]
1898 Pecten (Chlamys) alumensis Dall, 1898
W. H. Dall, 1898, plate 34.
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«Oligocene of the Chipola horizon, in the lower bed at Alum Bluff, Chattahoochee River, Florida; Dall.
Shell small, thin, with compressed, flattish umbones and fourteen or fifteen feeble, obsolete ribs on the lower part of the disk separated by equal shallow interspaces; the whole surface marked with fine concentric lines; ears subequal, concentrically striate, not radiated, except the byssal ear, which has five scabrous riblets and a well-marked notch; interior fluted to correspond with the external ribs; the cardinal crura developed. Alt. reaching 15-18 mm. in fully adult shells; figured specimen 8, lat. 7.5 mm. This small shell is sufficiently distinct in its characters to indicate its specific rank, though it may be that it attains a larger size when adult than any of the specimens obtained. One or two of the specimens have the ribs more rounded and prominent than the majority.» WILLIAM HEALEY DALL, 1898
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«Cotypes: U. S. Nat. Mus. No. 114580.
Type locality: No. 2211, Alum Bluff (lower bed), Liberty County, Fla. In so strongly individualized a group this species is well characterized by its lack of character. The sculpture is obsolete in the umbonal region and even at best has a much worn and subdued aspect. Occurrence: Chipola formation, localities 2213r, 3419p, 2211c.» GARDNER, J. 1926. The molluscan fauna of the Alum Bluff Group of Florida. Part I. Prionodesmacea and Anomalodesmacea. United States Geological Survey Professional Paper, 142-A: 1-79, pls. 1-15, 1 map. [p. 48]
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Chlamys (Chlamys) alumensis Dall; J. Gardner, 1926, The molluscan fauna of the Alum Bluff Group of Florida. Part I, plate 12, figures 8, 9.
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