Laevichlamys cuneata (Reeve, 1853)
REEVE, L. A. 1852-1853. Monograph of the genus Pecten. In: Conchologia
Iconica: or illustrations of the shells of molluscous animals, vol. 8. London [unnumbered pages], pls. 1-35. [pl. 24, figs. 94a, 95]
1842 Pecten irregularis G. B. Sowerby II, 1842
1842 Pecten serratus G. B. Sowerby II, 1842
1938 Chlamys cookei Dall, Bartsch & Rehder, 1938
1853 Pecten cuneatus Reeve, 1853
1858 Pecten dissimilis Moutrouzier in Fischer, 1858 [nomen novum pro Pecten serratus G. B. Sowerby II, 1842]
1968 Chlamys midwayensis Habe & Okutami, 1968
1998 Laevichlamys brettinghami Dijkstra, 1998 [nomen novum pro Pecten irregularis G. B. Sowerby II, 1842]
1842 Pecten serratus G. B. Sowerby II, 1842
1938 Chlamys cookei Dall, Bartsch & Rehder, 1938
1853 Pecten cuneatus Reeve, 1853
1858 Pecten dissimilis Moutrouzier in Fischer, 1858 [nomen novum pro Pecten serratus G. B. Sowerby II, 1842]
1968 Chlamys midwayensis Habe & Okutami, 1968
1998 Laevichlamys brettinghami Dijkstra, 1998 [nomen novum pro Pecten irregularis G. B. Sowerby II, 1842]
L. A. Reeve, 1853, plate 24.
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«PECTEN CUNEATUS. Pect. testa ovata, altiore quam longa, aequilaterali, aequivalvi, valvis versus mariginem compressis, densissime radiatim liratis et striatis, liris plus minus obtuse serratis; colore varia, interdum rufo-aurantia nigro sparsim variegata, interdum nigricante-fusca luteo variegata; auriculis valde inaequalibus.
THE WEDGE-LIKE PECTEN. Shell ovate, higher than long, equilateral, equivalve, valves compressed towards the margin, very thickly radiately ridged and striated, ridges more or less obtusely serrated; colour various, sometimes reddish -orange variegated sparingly with black, sometimes blackish-brown variegated with yellow; ears very unequal. Hab. Moluccas. It should be observed that the numbers of this characteristic new species in the plate are No. 94 a and 95. The Fig. 94 b refers to the following species.» LOVELL AUGUSTUS REEVE, 1853
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«Description.— Shell up to 40 mm high, most specimens under 30 mm; subcircular to prosocline, inequivalve, inequilateral, left and right valves almost equally inflated, auricles highly unequal in shape and size, umbonal angle c. 80-85˚; colour highly variable, cream, yellow, orange, red, purple, brown to almost black; uniform or a variable pattern of dots and/or streaks. Interior glossy, coloured as exterior. Both valves sculptured with c. 40-50 unevenly spaced minutely sqamose rounded radial riblets of variable prominence. Intercalated microscopic antimarginal scratches laterally, more prominent on anterior end of right valve. Anterior auricles much larger than posterior, with delicate scaly riblets (c. 10 on left valve, c. 5 coarser ones on right valve), anterior auricle of right valve somewhat declined dorsally. Byssal notch deep, byssal fasciole broad. Functional ctenolium well-developed, with c. 6-8 teeth.
Distribution.— Tropical Indo-West to the central Pacific, from southern Japan southwards to northern Australia, westwards into the Indian Ocean to Sri Lanka, and eastwards into the Pacific to French Polynesia (ZMA, unpublished data; Raines & Poppe, 2006: 198). Present specimen from the Philippines alive at 4-24 m. Living byssally attached to underside of coral slabs, amongst rubble and live coral on sandy bottoms. Remarks.— The present specimens from the Philippines are similar to the type material. Waller (1972: 238) listed a scallop, Chlamys sp. cf. irregularis (Sowerby), from “Cocos-Keeling, Caroline, Marshall, Gilbert, and Phoenix Islands”, which closely resembles the present one and in fact is conspecific, with identical characters to the type material of L. cuneata. The Hawaiian morph, Chlamys cookei Dall, Bartsch & Rehder, 1938, differs slightly from L. cuneata in having a more circular shape (L. cuneata is more obliquely oblong), by its finer radial sculpture, and by its brighter coloration (dark colours as in typical specimens from the western Pacific are not observed). It is possible that Chlamys midwayensis Habe & Okutani, 1968 from Midway Island (in the Hawaiian chain) is conspecific with the Hawaiian morph, although it has somewhat coarser radial sculpture and probably occurs in deeper waters.» DIJKSTRA, H. H. 2013. Pectinoidea (Bivalvia: Propeamussiidae and Pectinidae) from the Panglao region, Philippine Islands. Vita Malacologica, 10: 1-108, pls. 1-32, 2 tabs. [p. 65]
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Laevichlamys cuneata (Reeve, 1853); H. H. Dijkstra, 2013, Pectinoidea from the Panglao region, plate 17, figures 1a-d, 3a-b; plate 28, figures 3a-b.
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«The Hawaiian species Chlamys cookei Dall, Bartsch, & Rehder, 1938, shown in Figures 43 and 44, differs from C . marshallensis in having more numerous primary costae. Chlamys midwayensis Habe & Okutani, 1968, is a possible synonym of C. cookei.»
WALLER, T. R. 1972. The Pectinidae (Mollusca: Bivalvia) of Eniwetock Atoll, Marshall Islands. The Veliger, 14 (3): 221-264, pls. 1-8. [p. 238]
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Chlamys cookei Dall, Bartsch & Rehder, 1938; T. R. Waller, 1972, The Pectinidae of Eniwetock Atoll, plate 3, figures 43, 44.
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«Remarks: – This species is distinguishable from Chlamys asperulata (Adams and Reeve) (Reeve, 1853, pI. 24, sp. 109), a Recent species of the Korean Strait, by its fewer scaled radial ribs.
Pecten irregularis reported from the Koshiba formation by Yokoyama (1911) seems to be a synonym of Chlamys jousseaumei Bavay as will be described in the later pages. By the re-examination of the type specimens the writer considers that Ozaki's macro-halimensis (1958) from the Na-arai formation is a synonym of the present species. Type locality: – Southern Pacific. Distribution: – Shirahama formation, Shizuoka Prefecture; Shimajiri formation, Okinawa Prefecture; Yokosuka, Miyata and Naganuma formations, Kanagawa Prefecture; Numa, Narita and Na-arai formations, Chiba Prefecture; Onma and Hiratoko formations, Ishikawa Prefecture; Tokyo formation, Tokyo Metropolis; Living in the Pacific (0-35°N.) and Japan Sea (-43°N.): Early Pliocene to Recent.» MASUDA, K. 1962. Tertiary Pectinidae of Japan. Science Reports of the Tohoku University [2nd. Series - Geology], 33 (2): 117-238, pls. 18-27. [p. 171]
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Chlamys irregularis (Sowerby); K. Masuda, 1962, Tertiary Pectinidae of Japan, plate 24, figures 2, 3.
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