Glorichlamys quadrilirata (Lischke, 1870)
LISCHKE, C. E. 1870. Diagnosen neuer Meeres-Conchylien von Japan. Malakozoologische Blätter, 17: 23-29. [p. 29]
1870 Pecten quadriliratus Lischke, 1870
Pecten quadriliratus; C. E. Lische, 1871, Japanische Meeres-Conchylien, volume II, plate 9.
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«Testa parva, ovato-trigona, solidiuscula, paene aequilatera, plano-convexa, plicata radiatimque lirata, inter liras minutissime squamosa; plicae undecim, in utraque valva ab initio simplices, tum sulco bipartitae, postremo quadriliratae; valva sinistra subnodosa, griseo-purpurea, zonis albidis signata, in interstitiis trilirata; valva dextra albida, colore pallide purpureo maculata , in interstitiis uni- vel bilirata; auriculae valde impares, costulis inaequalibus rugosis et subnodosis instructae. — Alt. 27, long. 21 mill.»
CARL EMIL LISCHKE, 1860
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«Description. — Shell up to c. 25 mm high, subcircular (juveniles) to oblong (adult), inequivalve (ribbing discrepant), slightly inequilateral, both valves weakly inflated, interior plicate, umbonal angle c. 85-90˚, auricles highly unequal in shape and size; left valve cream with purple or brown maculations, right valve paler or whitish. Left valve sculptured with 8-11 prominent quadripartite (in mature individuals) radial costae with rounded crests and 1-3 intercalated radial riblets in each interspace. Microsculpture of closely spaced commarginal lamellae. Anterior auricle with 10-12 weakly to strongly developed radial riblets, lamellate and noduliferous on dorsal margin; posterior auricle very small, with few fine radial riblets.Right valve with broad prominent quadripartite radial costae, crests less rounded than on left valve; one interstitial radial riblet in each interspace. Microsculpture as on left valve. Anterior auricle with c. 10 squamose radial riblets. Byssal notch weak, byssal fasciole small, functional ctenolium with 4-6 teeth.
Distribution. — Throughout the tropical Indo-West Pacific, from southern Japan to northern Australia, westwards into the Indian Ocean to Madagascar and into the Red Sea, and eastwards into the central Pacific to Fiji (Raines & Poppe, 2006: 116). Present specimens from the Philippines dead at 10-116 m. Bathymetric range of live-taken specimens is 20-80 m (ZMA, unpubl. data). Living amongst coral rubble on sandy or muddy sand bottoms. Remarks. — The present material from the Philippines is indistinguishable from examined specimens from Japan (NSMT, ZMA) and from the original description by Lischke. For comparison with the congeneric species Glorichlamys elegantissima see Dijkstra (1989: 12). Both species seems to prefer a coral environment with a similar habitat (byssally attached to the underside of living coral or amongst dead coral rubble on sandy bottoms).» DIJKSTRA, H. H. 2013. Pectinoidea (Bivalvia: Propeamussiidae and Pectinidae) from the Panglao region, Philippine Islands. Vita Malacologica, 10: 1-108, pls. 1-32. [p. 40]
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Glorichlamys quadrilirata (Lischke, 1870); H. H. Dijkstra, 2013, Pectinoidea from the Panglao region, Philippine Islands, plate 10, figures 2a-2d.
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«Distribution: Red Sea, Malagasy,. Thailand, extending eastwards to southern Japan, China, Philippines, Indonesia, Australia, New Caledonia, and Fiji Islands. Littoral to sublittoral depths, living under rocks, coral boulders or among coral rubble on soft substrates.
Description: Shell small, up to ca. 25 mm high, suborbicular to elongate, inequivalve, slightly inequilateral, both valves convex and radiated, inside plicated, aurides strongly unequal, umbonal angle ca. 85-90º, auricular crura well developed, resilium triangularly oblong. Left valve sculptured with 8-11 prominent quadripartite (in mature individuals) rounded radial costae and 1-3 interstitial radial riblets. Microsculpture with closely arranged commarginal lamellae. Anterior auricle with 10-12 weakly and strongly developed radial riblets, lamellated and noduliferous on dorsal margin, posterior auricle very small with few fine radial riblets. Right valve with broad prominent quadripartite radial costae, less rounded than of those of the left valve, one interstitial radial riblet per interval. Microsculpture as in left valve. Anterior auricle with ca. 10 squamose radial riblets. Byssal notch weak. byssal fasciole small, active ctenolium with 4-6 teeth on the suture. Colour of left valve cream with purple or brown maculations, right valve paler or whitish. Remarks: This is a new record for the Red Sea. Only one dead specimen has been collected so far, which is morphologically similar to the original description of Lischke. For conchological comparison with Glorichlamys elegantissima see Dijkstra (1989: 12-15).» DIJKSTRA, H. H. & J. KNUDSEN. 1998. Some Pectinoidea (Mollusca: Bivalvia: Propeamussiidae, Pectinidae) of the Red Sea. Molluscan Research, 19 (2): 43-104. [p. 60, 61]
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Glorichlamys quadrilirata (Lischke, 1870); H. H. Dijkstra & J. Knudsen, 1998, Some Pectinoidea of the Red Sea, plate 10, figures 46, 47.
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«Remarks: One left valve at hand takes the following description: Shell small in size, higher than long, nearly equilateral except for auricles; left valve moderately inflated, forming an angle of a little less than 90° at the apex. Surface with distinct radial ribs and equally spaced lamellated fine concentric lines; radial ribs about 12 in number, divided into two to three finely scaled radial threads by shallow, fine longitudinal furrows; scales on radial threads more distinct at submargins than those of the central part of disc; interspaces between radial ribs with a fine, finely scaled intercalary thread and with equally spaced fine lamellated concentric lines; anterior auricle much larger than the posterior one, with several, distinct imbricated radial threads and equally spaced, distinct fine concentric lines; interior surface folded corresponding to the radial ribs on the surface; hinge with simple cardinal crura.
The present species can be distinguished from Bractechlamys aurantiaca (Adams and Reeve), a Recent species in Southwestern Pacific, by its small shell, smaller number of radial ribs and very large anrterior auricle. Dimensions (in mm.): Left valve, height 15.2, length 13.4 and depth 2.5. Recent distribution: Central Japan (Izu Peninsula as northern limit) to Southeast Asia. Geologic distribution: Toukoushan Formation in Miaoli Hsien, Taiwan. Geologic range: Pleistocene to Recent.» MASUDA, K. & C. HUANG. 1994. Tertiary and Quaternary Pectinidae from northern Taiwan. Journal of the Geological Society of China, 37 (4): 497-549, pls. 1-10. [p. 510, 511]
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Bractechlamys quadrilirata (Lischke, 1871); K. Masuda & C. Huang, 1994, Tertiary and Quaternary Pectinidae from northern Taiwan, plate 2, figure 8.
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