Chlamys albida (Dall in Arnold, 1906)
ARNOLD, R. 1906. The Tertiary and Quaternary pectens of California. United States Geological Survey Professional Paper, 47: 1-264, pls. 1-53. [p. 136, pl. 52, figs. 2, 2a]
1906 Pecten (Chlamys) hastatus var. albidus Arnold, 1906
1907 Pecten (Chlamys) erythrocomatus Dall, 1907
1967 Chlamys wainwrightensis MacNeil, 1967
1907 Pecten (Chlamys) erythrocomatus Dall, 1907
1967 Chlamys wainwrightensis MacNeil, 1967
R. Arnold, 1906, plate 52.
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«1904. Pecten (Chlamys) hericius var. albidus Dall, MS.
Description.— Shell of the same shape and general appearance as P. var. hericius, but smaller when adult, being only about 45 millimeters in altitude. The sculpture on the right valve consists of numerous elevated, narrow, thread-like, imbricated riblets, which have the appearance of being grouped together in three or more unequal, equidistant, more or less convex fasciculi; the interspaces between the fasciculi are ornamented by riblets of equal prominence to those forming the fasciculi; anterior ear with about seven equal, prominently imbricated radials; posterior ear short and with radial and imbricating sculpture; byssal notch quite prominent. Left valve similar to right, but with the fasciculi corresponding to the interspaces of the right valve, and consequently much narrower than the fasciculi of that valve. Color, white to very light pink. Dimensions.— Alt. 45 mm.; long. 40 mm.; hinge line 19 mm.; diameter 14 mm. This variety is characterized by its broad, low fasciculi and light color. Type, No. 150207, U. S. Nat. Mus., from U. S. F. C. Sta. 3313. lliuliuk Harbor, Unalaska, 68 fathoms, 42.7º bottom temperature. RANGE
Living. U. S. F. C. Stas. 3311, 3313, 3318, 3321, Bering Sea, in 54 to 85 fathoms (U. S. Fish Commission).»
RALPH ARNOLD, 1906
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«Chlamys albida (R. Arnold, 1906). White scallop.
Pecten (Chlamys) hastatus albidus R. Arnold 1906; P. (Chlamys) erythrocomatus Dall 1907; Chlamys hanaishiensis Masuda 1962; C. (Chlamys) wainwrightensis MacNeil 1967. Type locality: Unalaska, Aleutian Islands. Distribution: Wainwright, Arctic Alaska, south to the Aleutian Islands from Tigalda to Atka; Kamchatka and the Kuril Islands to northern Japan; 100–200 m.» DRUMM, D. T., K. P. MASLENIKOV, R. V. SYOC, J. W. ORR, R. R. LAUTH, D. E. STEVENSON & T. W. PIETSCH. 2016. An annotated checklist of the marine macroinvertebrates of Alaska. NOAA Professional Paper NMFS, 19: 1-289. [p. 141]
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«Chlamys albida (PI. 1, Figs: 11-13), treated as a subspecies of C. islandica by Grau (1959) and MacNeil (1967) and as a distinct species by Bernard (1983), occurs in the Bering Sea, Aleutian Islands, Okhotsk Sea, and Kurile Islands, extending along the Pacific coast of Japan as far south as 45° N and in the Japan Sea as far as 48° N (Grau, 1959). Thus far there has been little agreement on whether C. erythrocomata (Dall, 1907) is a junior synonym of C. albida, as indicated by Grau (1959) and Bernard (1983) or a distinct species, as suggested byMacNeil (1967), Skarlato (1981), and Baxter (1983). The type locality of C. erythrocomata is the Okhotsk Sea, within the range of C. albida. Another possible synonym is C. chosenica (Kuroda, 1932) ( = C. rosealbus Skarlato, 1981), which lives in the Okhotsk Sea and Japan Sea.»
WALLER,
T. R. 1991. Evolutionary relationships among commercial scallops
(Mollusca: Bivalvia: Pectinidae). In: Shumway S. E. (ed.), Scallops:
biology, ecology and aquaculture. Developments in Aquaculture and
Fisheries Science, Elsevier, Amsterdam, 21: 1-73, pls. 1-8. [p. 20]
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Chlamys albida; T. R. Waller, 1991, Evolutionary relationships among commercial scallops, plate 1, figures 11-13.
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«Shell subrounded and moderate in thickness, apical angle about 90°, anterior margin slightly longer than dorsal margin, right valve with equal radial ribs which tend to gather into 4 to 5 fascicular bundles, smooth intercalary threads. Left valve with 3 to 4 fascicular bundles.
Comparisons: This form is more closely related to Ch. erythrocomatus. Grau (1959) combined this eastern Aleutian subspecies with Ch. islandica erythrocomata from the Okhotsk Sea, but the writers prefer to regard them as separate species because this form is more higher and less angulate than Ch. erythrocomatus (Fig.3). Repository: Holotype (U S N M 150207) has a height of 45 mm. Dimensions (in mm): Length Height Depth Apical angle Anterior margin Dorsal margin
20023 59 73 9 90° 34 34 20024 61 70 11 90° 37 36 20025 58 66 12 92° 31 32 Occurrence: Nakazato, upper streana of the Shubuto River, about 6km, southeast of Kuromatsunai station of the Hakodate Line, Kuroinatsunai Machi, Suttsu Gun, Shiriveshi Province.
Geological age: Pliocene to Recent Hokkaido specimens: U.H. Reg. No. 20023, 20024, 20025.» UOZOMI, S. & M. AKAMATSU. 1975. Pliocene Pectinids from Southwest Hokkaido, Japan -Chlamys Islandicus Group -. Journal of the Faculty of Science, Hokkaido University [Series 4, Geology and Mineralogy], 17 (1): 27-71, pls. 1-12. [p. 35, 36]
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Chlamys albidus (Dall); S. Uozumi & M. Akamatsu, 1975, Pliocene Pectinids from Southwest Hokkaido, Japan, plate 5, figure 5; plate 6, figures 1, 2. [Chlamys erythrocomatus (Dall): plate 5, figures 2-4]
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«Remarks: The descriptions of Pecten hastatus albidus and P. (Chlamys) erythrocomatus are so similar that it would be impossible to definitely refer a specimen to either by relying on them. At the author's request Dr. Harald A. Rehder examined the holotype of both and concluded "... I would be inclined to unite them."
Chlamys islandica albida is quite variable in form and sculpture. The disk may be longer than high or nearly circular, either flatly convex or rather deeply so; the ribs vary in number and may be well or poorly defined; the number of ribs varies; the imbricating sculpture varies in profusion and prominence. The broad, low ribs and smaller auricles (particularly the posterior), are the chief differences between this subspecies and the typical. From C. islandica behringiana it differs in rib-structure and sculpture. Geographical range: Bering Sea through the Aleutian Islands, Okhotsk Sea and Kurile Islands to Japan: Pacific coast of Japan as far south as 45° N, Japan Sea as far south as 48° N. Geochronological range: Known only from the Recent. Bathymetric range: 50 to 100 fathoms, possibly deeper. Ecological data: None available.» 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. 73]
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Chlamys islandica albida (Dall in Arnold) 1906; G. Grau, 1959, Pectinidae of the eastern Pacific, plate 23, figure 1.
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