Anatipopecten anatipes (Morton, 1833)
MORTON, S. G. 1833. Supplement to the "Synopsis of the organic remains of the ferruginous sand formation of the United States" (I). American Journal of Sience, 23: 288-294. [p. 293, pl. 5, fig. 4]
1833 Pecten anatipes Morton, 1833
«Anatipopecten Hertlein, 1936, is another decatopectinine genus restricted to the Americas. Pecten anatipes Morton, 1833, the type species, is confined to the early Oligocene (Vicksburgian; Huddlestun, 1993: 77) of the Gulf of Mexico Coastal Plain. It differs from Antillipecten in having a commonly well-developed three- element hinge dentition and costate disk flanks, as well as enhanced development of commarginal ledging and well-developed radial costae on posterior auricles.»
WALLER, T. R. 2011. Neogene Paleontology of the Northern Dominican Republic. 24. Propeamussiidae and Pectinidae (Mollusca: Bivalvia: Pectinoidea) of the Cibao Valley. Bulletins of American Paleontology, 381: 1-197. [p. 112]
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Flexopecten anatipes (Morton); V. W. K. Palmer & D. C. Brann, 1965, Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States, plate 1, figure 3.
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«Discussion: In Mississippi, this species is most abundant at the base of the Glendon Limestone at locality 45b. It is easily recognized by its broad ribs and interspaces and is the type species for the sub genus Anatipopecten.
Type: Holotype 12575 ANSP from Claiborne, Alabama (horizon uncertain). The locality given by Richards (1968, p. 31) is St. Stephens, Alabama.
Occurrence: Mississippi: Forest Hill Formation, locality 75a; Mint Spring Formation, locality 89a; Marianna Limestone, locality 75c; Glendon Lime stone, locality 45b. Also occurs in the Red Bluff, Marianna, Glendon, and Byram Formations of Alabama, the Bumpnose Limestone of Florida, and the Marianna and Flint River Formations of Georgia.»
DOCKERY III, D. T. 1982. Lower Oligocene bivalvia of the Vicksburg Group in Mississippi. Mississippi Department of Natural Resources, Bureau of Geology, Bulletin, 123: 1-261, pls. 1-62, text-figs. 1-48, appendix of 15 plates. [p. 44]
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Chlamys (Anatipopecten) anatipes (Morton); D. T. Dockery III, 1982, Lower Oligocene bivalvia of the Vicksburg Group in Mississippi, plate 12, figures 1-7.
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«DESCRIPTION.— Morton's original description: "With four of five broad convex ribs, longitudinally striated; at the sides large striae replace the ribs. Rarely more than half an inch in diameter. From the overlying limestone of Claiborne, Alabama."
Shell suborbicular, thick, small, maximum height 31.2 mm, maximum length 29.2 mm; both valves convex; ribs broad, rounded, increase in width ventrally, wider than interspaces; 4 to 7 strong ribs on the central portion of the disk and a smaller one on either side; lirae on ribs, interspaces, and submargins; concentric lamellae closely spaced. Ears fairly large, nearly equal, with numerous radial striations; byssal notch deep; ctenolium in right valve with 3 or 4 teeth exposed. Hinge with provinculum, one pair of cardinal crura, and a resilial pit; broad internal ribs fluted along ventral margin. DIMENSIONS.— Holotype, fragmentary specimen from near Claiborne, Alabama. OCCURRENCE IN GEORGIA.— Rare in Marianna Limestone on the west bank of the Ocmulgee River at Lower City Park, Hawkinsville (locality 32). Also reported from the Oligocene beds at Red Bluff, seven miles above Bainbridge and on the west bank of Flint River, opposite Little Horseshoe Point, 0.5 mile below Mascot Point and 4.5 miles below Bainbridge, Georgia (Vaughan, Cooke, Mansfield; in Dall, 1916). DISTRIBUTION ELSEWHERE IN THE SOUTHEASTERN UNITED STATES.— Chlamys anatipes is found in the Oligocene formations of Mississippi (Glendon), Alabama (Red Bluff, Marianna, Glendon, Byram), and Florida (Bumpnose); but its presence is always rare. REMARKS.— Palmer and Brann (1965, p. 144) list the geologic range of Chlamys anatipes from Upper Eocene (type) to Oligocene. They apparently consider the type to be from the Upper Eocene because Morton reported it "from the overlying limestone of Claiborne, Alabama." However since Morton (1833, p. 293) also found Pecten perplanus Morton (now Pecten perplanus perplanus) in the same beds as C. anatipes and I have found P. p. perplanus only in Oligocene beds (Glawe, 1969), I conclude that the type of C. anatipes (if found in place) came from the Oligocene beds near Claiborne, Alabama.» GLAWE, L. N. 1974. Upper Eocene and Oligocene Pectinidae of Georgia and their stratigraphic significance. Geological Survey of Georgia, Information Circular, 46: 1-27, pls. 1-4. [p. 8]
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Chlamys (Anatipopecten) anatipes (Morton); L. N. Glawe, 1974, Upper Eocene and Oligocene Pectinidae of Georgia, plate 4, figures 2, 4-6.
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