Nodipecten pittieri (Dall, 1912)
DALL, W. H. 1912. New species of fossil shells from Panama and Costa Rica. Smithsonian Miscellaneous Collections, 59: 1-10, pls. 1-36. [p. 10]
1912 Pecten (Lyropecten) pittieri Dall, 1912
1968 Chlamys (Nodipecten) colinensis guadeloupensis Mongin, 1968 [partim]
1968 Chlamys (Nodipecten) colinensis guadeloupensis Mongin, 1968 [partim]
Pecten (Lyropecten) pittieri Dall; W. H. Dall, 1925, Illustrations of
unfigured types of shells in the collection of the United States National
Museum, plate 17, figure 6.
|
«Shell large, nearly equivalve, suborbicular, coarsely sculptured; left valve moderately convex, with ten strong rounded ribs, obsolete distally, with shallow rounded interspaces at first narrower, afterward wider than the ribs; submargins wide, subequal, radially sculptured with coarse, somewhat irregular threads, about ten in number, which when perfect have a fine, concentric, imbricate sculpture; similar radial sculpture covers both valves, the threads coarser and more regular on the right valve; of the major ribs on the left valve, five alternating ones bear on their proximal halves six to ten prominent, thin, evenly spaced, vaulted scales, resembling those of P. imbricatus Gmelin; similar scales are wanting in the right valve; ears subequal, with about half a dozen radial threads and dense, concentric sculpture; margin of the valve wavy, not sulcate; interior with ten deeply channelled, wide sulci corresponding to the external ribs, the angles of the interspaces emphasized near the valve margin; hinge with a deep subtriangular pit for the resilium, a strong anterior ridge and two marked posterior grooves with a ridge between them. Adductor scar large, with a rather ragged margin. Right valve with eleven stronger ribs, each carrying five or six riblets, with two or three similar riblets in the interspaces; the proximal halves of the ribs are slightlly undulated but not scaly ears subequal, rudely imbricate on the dorsal margin and on the four or five radial threads of the anterior ear; ctenolium with about 16 spines, byssal notch narrow, angular; hinge-line grooved reciprocally to that of the left valve. Height 132; length of shell 152; of hinge-line 82; max. diameter omitting spines 46 mm.
Locality, Moin Hill, near Port Limon, Costa Rica, niveau a. H. Pittier, 1899. Type, U. S. Nat. Mus. 214368. This fine and remarkable species is somewhat intermediate between Lyropecten and Nodipecten, and when young must have the aspect of a Chlamys much like C. imbricatus.» WILLIAM HEALEY DALL, 1912
|
«Nodipecten colinensis guadeloupensis (Mongin, 1968) as represented by its holotype has a left central sector with the pattern N r Nc r N. Both Smith (1991b: 97) and the present author place it in the synonymy of N. pittieri. Two other specimens illustrated by Mongin (1968: pl. 43, figs 1-2), however, have a rib pattern of N 2n Nc 2n N and, as noted by Smith (1991b: 51) are N. c. colinensis. Their precise stratigraphic position, however, has not been determined.»
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, pls. 1-18. [P. 122]
|
Chlamys (Nodipecten) colinensis (Hodson et Harris) forma guadeloupensis; Mongin, 1968, plate 45, figure 1, Holotype.
|