Carolinapecten eboreus yorkensis (Conrad, 1867)
CONRAD, T. A. 1867. Notes on fossil shells and descriptions of new species. American Journal of Conchology [New Series], 3 (2): 188-190. [p. 189]
1867 Pecten yorkensis Conrad, 1867
Chlamys (Plagioctenium) eboreus solarioides (Heilprin); H. I. Tucker-Rowland, 1938, The Atlantic and Gulf Coast Tertiary Pectinidae of The United States, plate 5, figure 10.
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«Description.— Orbicular, thin, depressed; umbonal region convex; ribs 21, subquadrate, little prominent; interstices about as wide as the ribs, with transverse wrinkles, which are obsolete on the ribs. Height 13/4 inches; length 17/8
inches.
Locality.— Yorktown, Virginia. Miocene.» TIMOTHY ABBOT CONRAD, 1867
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«Pecten yorkensis was described by Conrad (1867) from the Yorktown Formation at Yorktown, Virginia. A single left valve (ANSP 38007) labeled Pecten yorkensis is in the collections at the Academy of Natural Sciences at Philadelphia and is chosen as the lectotype (Plate 9: figure 5). This specimen closely matches the dimensions and number of plicae given in the original description. Although some workers (e.g., Mansfield, 1936: 179, Tucker-Rowland, 1938: 38) have considered P. yorkensis to be a valid subspecies of Argopecten eboreus, this specimen appears to fall within the range of variation of A. e. eboreus.»
GIBSON, T. G. 1987. Miocene and Pliocene Pectinidae (Bivalvia) from the Lee Creek Mine and Adjacent Áreas. Smithsonian Contributions to Paleobiology, 61: 31-112. [p. 51]
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Argopecten eboreus yorkensis (Conrad, 1867); T. G. Gibson, 1987, Miocene and Pliocene Pectinidae from the Lee Creek Mine, plate 9, figure 5.
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«Pecten eboreus yorkensis Dall (9d), which does not appear to have been figured, came from some part of the fragmental series at Yorktown, Virginia. Much larger specimens were collected below Yorktown by Dr. Julia Gardner and me in 1933 from a laminated sandy clay bed which filled a channel formed in the surrounding fragmental series. The subspecies also occurs in a bluish clayey sand in the lowest bed at old Rock Wharf, James River (U. S. Geol. Survey Station I/206). It appears to occur in the middle part of zone 2 of the Yorktown formation. Pecten eboreus yorkensis probably is the precursor of P. eboreus eboreus Conrad, differing from the latter in having a shell more inflated in the umbonal region.»
MANSFIELD, W. C. 1936. Stratigraphic significance of Miocene, Pliocene and Pleistocene Pectinidae in the Southeastern United States. Journal of Paleontology, 10 (3): 168-192. [p. 179]
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