Bractechlamys oweni (Gregorio, 1884)
GREGORIO, A. DE. 1884. Intorno al Pecten pictus Sow. non Goldf. e al P. corneus G.B. Sow. non I. Sow. Naturalista Siciliano, 3: 133. [p. 133]
1842 Pecten pictus G. B. Sowerby II, 1842
1842 Pecten oweni Gregorio, 1884 [nomen novum pro Pecten pictus G. B. Sowerby II, 1842]
1842 Pecten oweni Gregorio, 1884 [nomen novum pro Pecten pictus G. B. Sowerby II, 1842]
Pecten pictus; G.B. Sowerby, 1842, Thesaurus conchyliorum, Monograph of the genus Pecten, plate 20, figure 233.
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«Entrambi i nomi di queste due belle specie esotiche viventi debbono mutarsi perchè adoperati già per designare altre specie fossili. — Pel Pecten pictus Sow. (Thes. Con., p. 62, tav. 20, f. 233 — Hanley Rec. Biv., p. 277. Catlow Reeve Nomenclator, p. 82. — Reeve Mon. Pecten, tav. 28, fig. 116) dell'isola di Baicus (Filippine) propongo il nome di P. oweni in onore del celebre naluralista Richard Owen Superintendent of the Nat. Hist. Departiment British Museum she segna uno degli opici più alti cui lo scienza possa arrivare.»
ANTOINE DE GREGORIO, 1884
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«Description. — Shell solid, up to c. 30 mm high, moderately inflated, adults somewhat pyxoid, almost circular, adult shells slightly higher than wide, almost equivalve and equilateral, auricles unequal in shape and size, umbonal angle c. 90˚; colour of left valve highly variable with cream, orange, red, pink or brown spots, many specimens with 3 uniformly coloured (cream or yellowish) radial costae, right valve paler and more uniform in colour (cream or whitish), laterally some blotches. Inner surface of left valve usually reddish, of right valve whitish, dorsally reddish or brownish. Both valves
sculptured with 11-13 radial costae and covered with closely spaced commarginal microsculpture. A few secondary interstitial radial riblets near ventral margin on some specimens. Anterior auricle of right valve with 4 prominent noduliferous radial costae, other auricles weakly ribbed or almost smooth. Dorsal margin of right valve with tubercles. Hinge line straight. Byssal fasciole small, byssal notch moderately deep, functional ctenolium with 3-4 teeth beneath suture ridge. Resilial pit triangular and elongate. Intermediate and dorsal teeth well developed. Internal rib carinae weak, more prominent near margin. Distribution. — (Sub)tropical West Pacific from southern Japan southwards to northern Australia. Amami Islands (Japan) southwards to tropical West Pacific: 10-20 m (Hayami, 2000: 907); East China Sea, Taiwan, South China Sea: intertidal to 20 m (Bernard, Cai & Morton, 1993: 50); Philippines: 10-25 m (Raines, 2010: 600); Tiur Island (Indonesia): 54 m (Dijkstra, 1990a: 8; Hansa Bay (Papua New Guinea): 3-25 m (Dijkstra, 1998a: 16). Present specimen from the Philippines dead at 627-645 m. Bathymetric range of live-taken specimens is intertidal to 60 m (ZMA, unpubl. data). Living free amongst gravel or coral rubble on sandy bottoms. Remarks. — The present specimens from the Philippines differ slightly from the type specimen in their greater convexity, the more prominent sculpture on the anterior auricle of the right valve and the number of radial lirae (one less). However, in other observed material (MNHN, ZMA) this falls within the variation range of B. oweni.» DIJKSTRA, H. H. 2013. Pectinoidea (Bivalvia: Propeamussiidae and Pectinidae) from the Panglao region, Philippine Islands. Vita Malacologica, 10: 1-108, pls. 1-32. [p. 35]
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Bractechlamys oweni (de Gregorio, 1884); H. H. Dijkstra, 2013, Pectinoidea from the Panglao region, Philippine Islands, plate 7, figures 1a-1d, 4a, 4b (juvenile).
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«Type material: Holotype BMNH 1950.11.14.53.
Type locality: Isle of Baicus, Philippines. Material examined: The type material. HANSA BAY, PAPUA NEW GUINEA PNG 1976: 206, W of Laing Island, dredged, 30 m, leg. J. Pierret, 29.iii.1976, 1 valve, IG 25.485; PNG 1979: 31, Mililat (N of Madang), barrier reef, sand, coral rubble, hand-dredged, 12-25 m, leg. J. Pierret, 17.ii.1979, 1 live specimen, IG 26.080; PNG 1979: 47, Nagada (N of Madang), Wongat reef, sand, coral, dredged, 25 m, leg. J. Pierret, 30.x.1979, 1 live specimen, IG 26.086; PNG 1979: 49, Mililat (N of Madang), large reef at E side of Wongat, coral, 3-5 m, leg. J. Pierret, iii.1979, 1 live specimen, IG 26.080; PNG 1979: 54, Nagada (N of Madang), Wongat reef, sand, coral, algae, dredged, 25 m, leg. J. Pierret, 5.xi.1979, 1 live specimen, IG 26.086; PNG 1980: 2, Nagada (N of Madang), Rash reef, dredged, 25 m, leg. J. Pierret, 29.viii.1979, 1 valve, IG 26.086; PNG 1980: 18, Nagada (N of Madang), Wongat reef, dredged, 25-30 m, leg. J. Pierret, 6.ix.1979, 2 valves, IG 26.086; PNG 1980: 41, Nagada (N of Madang), Wongat reef, dredged, 25 m, leg. J. Pierret, 24.ix.1979, 1 valve, IG 26.086; PNG 1981: 59, Wanginem 2, dredged, 40 m, leg. J. Pierret, 22.x.l980, 1 valve, IG 26.253. Distribution: Southern Japan. Philippines, Indonesia, Papua New Guinea to the Solomon Islands. Living amongst coral rubble on sand in the littoral. Remarks: The present specimens are similar to the type material, although the coloration of the shell is somewhat paler. The radial costae are slightly more prominent than on the type specimen, and vary in number (12 to 14). De Gregorio (1884) renamed Pecten pictus (preocc. Goldfuss, 1833), but overlooked Pecten pictus Deshayes in Laborde, 1830, which is a junior synonym of Gloripallium maculosum (Forsskål, 1775).» DIJKSTRA, H. H. 1998. Pectinoidea (Mollusca: Bivalvia: Pectinidae: Propeamussiidae) from Hansa Bay, Papua New Guinea. Molluscan Research, 19 (1): 11-52. [p. 16]
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Bractechlamys oweni (De Gregorio, 1884); B. K. Raines & G. T. Poppe, 2006, A Conchological Iconography, The Family Pectinidae, plate 38, figures 1-6.
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