Hyalopecten neoceanicus (Dall, 1908)
DALL, W. H. 1908. The Mollusca and the Brachiopoda.
Reports on the Mollusca and Brachiopoda [U. S. Fish Commission Steamer
''Albatross'' during 1891 and 1905] region. Bulletin of the Museum of
Comparative Zoology at Harvard University, 43 (6): 203-487, pls. 1-22. [p. 402, pl. 9, fig. 4]
1908 Pecten (Pseudamusium) [sic] neoceanicus Dall, 1908
W. H. Dall, 1908, plate 9.
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«Shell small, thin, brownish white, concentrically undulate and with both valves similarly reticulately sculptured, equivalve, somewhat equilateral; beaks (showing small, polished prodissoconcli) small, pointed, tbe left one rising a little higher than the other; hinge line straight, ears subequal, sharply pointed, byssal notch and fasciole distinct, sculpture like that of the disk; surface of the valves with about four easy, wide, rounded undulations; surface sculptured with numerous fine, squarish, radial and concentric threads subequal and subequally distributed, so that the meshes are mostly square, without nodulation at the intersections, and the interspaces are wider than the threads; disk short, kite-shaped, a little produced in front, suddenly constricted at the margin; interior white, polished, the umbonal cavities extending under the hinge line ; the pit and resilium small. Alt. 12.0; lat. of shell, 12.0; of hinge line, 7.7; diam. 4.0 mm.
U. S. S. "Albatross," station 4721, Pacific Ocean in South Lat. 8° 7', and West Lon. 104° 10', in 2084 fathoms, globigerina ooze, bottom temperature about 35° F. U. S. N. Mus. 110,579. This is a most exquisite little gem of the sea.» WILLIAM HEALEY DALL, 1908
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«Remarks: This species is here referred to Hyalopecten because of the undulations of the disk (which are functional rather than the result of environment, as in some species of Delectopecten) and the small but well-developed auricles (similar to those of some specimens of the type-species). The reticulate sculpture of the disk distinguishes it from other species of the subgenus.
Geographical range: Reported only from the type locality and from U.S. Fish Commission station 3407, near the Galapagos Islands, in 885 fathoms.» GRAU, G. 1959. Pectinidae of the eastern Pacific. Allan Hancock Pacific Expeditions, 23: i-viii, 1-308, pls. 1-57. University of Southern California Press. Los Angeles, California. [p. 57]
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Cyclopecten (Hyalopecten) neoceanicus (Dall) 1908: G. Grau, 1959, Pectinidae of the eastern Pacific, plate 2, figure 2.
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