Chlamys islandica thulensis MacNeil, 1967
MACNEIL, F. S. 1967. Cenozoic pectinids of Alaska, Iceland, and other nothern regions. United States Geological Survey Professional Paper, 553: iv, 57 p., pls. 1-25. [p. 34, pl. 18, fig. 2]
1967 Chlamys (Chlamys) islandica thulensis MacNeil, 1967
F. S. MacNeil, 1967, plate 18.
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«Discussion.— The form so named comes from late Pleistocene deposits of northern Greenland. It is distinguished from typical C. islandica by weak fascicles which, toward the beak, become single ribs that are higher and stronger than the adjacent riblets.
While this may be just an individual variation of C. islandica, it is intermediate morphologically and geographically between typical C. islandica and C. islandica albida. It has some resemblance to C. i. kanagae. More specimens from this locality will have to be examined before its validity as a subspecies can be confirmed. Several scraps of other individuals have similar fasciciles. Holotype: USNM 645010, an incomplete left valve, has a greatest dimension of 81 mm. Type locality: Raised beach, probably postglacial, Narssurssuk, northwestern Greenland, USGS D386.» FRANCIS STEARNS MACNEIL, 1967
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