Aequipecten glyptus (Verrill, 1882)
VERRILL, A. E. 1882. Catalogue of marine Mollusca added to the Fauna of New England during the past ten years. Transactions of the Connecticut Academy of Arts and Sciences, 5: 447-587. [p. 580]
Chlamys (Aequipecten) glypta Verrill; A. E. Verrill, 1897, A study of the family Pectinidae, with a revision of the genera and subgenera, plate 16, fugures 7-11.
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«Shell large, rather thin, compressed, both valves a little convex, the lower one a little flatter; ventral margin evenly rounded ; the dorsal edges are nearly straiglit and meet at rather more tlian a right angle; ears rather large, the anterior one with a triangular notch, beyond which the end is rounded to the dorsal angle; surface with eight or more unequal ribs; posterior one triangular, truncated at the end, with three or four thin ribs. Surface of the valves with about seventeen or eighteen large triangular ribs, separated by wider, broadly concave interspaces. The whole surface, both of the ribs and interspaces, is regularly covered with line, radiating, raised lines; the interspaces between these are crossed by very regular, concentric scallops, formed by thin, raised lines. On the lower valve there are similar large radiating ribs, but the fine radii and concentric scallops are obsolete.
Color, of the upper valve, orange brown, paler between the ribs. Diameter, more than 2 inches (50mm). The larger specimens are all fragmentary; on some of these the distance from the crest of one rib to another is 7mm. Off Martha's Vineyard, stations 871, 873, 874, 876, 949, in 85 to 120 fathoms.» ADDISON EMERY VERRILL, 1882
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«Although Chagrepecten paracactaceus n. gen., n. sp. in the middle Pliocene part of the Mao Formation is the geologically youngest definite member of the new genus, there is an extant species that might have branched off early from Chagrepecten n. gen. It is Pecten glyptus Verrill, 1882, which lives in the western North Atlantic from southeast of Cape Cod to the Florida Strait and in the northern Gulf of Mexico at depths from ca. 150-250 m. It resembles species of Chagrepecten n. gen. in shell outline, convexity, byssal notch, and ctenolium, as well as shell thickness and the distribution of foliated-calcite on inner shell layers. Although it also has broad, narrow-crested ribs comparable in profile and number to the fossil species of Panama and the Dominican Republic, it lacks radial costellae (except in early ontogeny), a vesiculate secondary surface, and prominent commarginal lirae. There is only a vestigial trace of the latter in the form of rows of tiny cuspate lamellae in late ontogeny. Unlike the fossil species, P. glyptus has prominent disk gapes.»
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. 67]
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Aequipecten glyptus (Verril, 1882); B. K. Raines & G. T. Poppe, 2006, A Conchological Iconography, The Family Pectinidae, plate 239, figures 5-7.
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