Nodipecten collierensis floridensis (Tucker & Wilson, 1932)
TUCKER, H. I. & D. WILSON. 1932. Some new or otherwise interesting fossils from the Florida Tertiary. Bulletins of American Paleontology, 18 (65): 41-53, pls. 1-5. [p. 43, pl. 4. fig. 6]
1932 Pecten (Lyropecten) pittieri floridensis Tucker & Wilson, 1932
1991 Nodipecten veracruzensis Smith, 1991
1991 Nodipecten veracruzensis Smith, 1991
H. I. Tucker & D. Wilson, 1932,
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«Shell large, nearly equivalve, suborbicular, radial sculpture coarse. Left valve somewhat convex, with seven rounded, steep sided, ribs which are sculptured with four or five elevated rounded threads. Three of the ribs are much more prominent and carry concentric rows of small nodes. On the smaller ribs the nodes are mucli less marked. Flattened interspaces increase markedly in width toward margins and have three to five strong radial threads. Whole surface of shell sculptured with concentric imbricated lamellae.
Submargins wide, subequal, radially sculptured with scaly threads. Auricles subequal, radially striate, with ten or twelve fine scaly threads. Interior fluted to umbones in harmony with external ribs. Chondrophore, trigonal, deep. Crural ridges strong. The right valve is similar to the left in sculpture except that the tendency to become nodose seems to be much less marked. Byssal ear radially sculptured with six elevated threads, concentric sculpture of fine lamellse. Notch narrow, deep, inconspicuous. This subspecies diflfers from P. pittieri Dall in its fewer ribs, flattened interspaces. Evidently floridensis is also related to Pecten (aff. Nodipecten) colinensis F. and H. Hodson, from the upper Tertiary of Venezuela. These species are especially interesting because they are apparently intermediate between Lyropecten and Nodipecten. Height 84; width 87; length of hinge 47 mm. Locality.— Buckingham, Fla.» HELEN IONE TUCKER & D. WILSON, 1932
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«A survey of extensive Smithsonian tropical American collections by the present author provided evidence that the separate evolutionary and geographic pathways followed by Nodipecten nodosus and N. fragosus were already in place by the middle Pliocene. Four nominal taxa occur in stratigraphic succession in the southern Florida peninsula: (a) N. collierensis collierensis (Mansfield, 23 March 1932) in the Ochopee Limestone Member of the Tamiami Formation (middle or late Pliocene) (Smith, 1991b: pl. 10, fig. 5, pl. 11, fig. 1); (b) N. c. floridensis (Tucker & Wilson, 28 March 1932) in the Buckingham Limestone (of original usage, in the type area near Buckingham) as well as in the Pinecrest beds (late Pliocene) (Smith, 1991b: pl. 8, fig. 5, pl. 10, figs 1, 3); (c) N. pernodosus (Heilprin, 1887) of the Caloosahatchee Formation (latest Pliocene and early Pleistocene) (Smith, 1991b: pl. 3, figs 1-2); and (d) the extant species, N. fragosus, present in the Bermont Formation (early to middle Pleistocene). Nodipecten c. floridensis, which Smith (1991b: 92) regarded as a junior synonym of N. fragosus, is transitional between N. collierensis s. s. and N. fragosus. I would regard N. c. floridensis as a subspecies of N. collierensis because of intergradation with that species (exemplified by a sample of ca. 50 specimens from the Buckingham type area, USGS localities 22597 and 22598). The entire succession can be regarded as a clade united by flattened, steep-sided, distinctly paired ribs on the right valve and commonly only one distinct minor rib between the central sector and the disk flanks of the left valve. Nodipecten peedeensis (Tuomey & Holmes, 1855) from the late Pliocene of the Carolinas (Smith, 1991b: 95) is another member of this clade.
The southernmost of any member of the Nodipecten fragosus group is N. collierensis floridensis in the lower part of the Agueguexquite Formation of Veracruz, Mexico (locality TU 638). These specimens, which Smith (1991b: 100) regarded as a new species, N. veracruzensis, are indistinguishable from the Florida subspecies. The Agueguexquite Formation was dated as foraminiferal zone N20, Middle Pliocene (Piacenzian) and correlated with the Pinecrest beds by Akers (1974).» 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. 126, 127]
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Nodipecten collierensis (Mansfield). J. T. Smith, 1991, Cenozoic giant pectinids from California and the Tertiary Caribbean Province, plate 8, figures 5, 6 (above); plate 10, figures 1-6 (below).
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