Laevichlamys deliciosa (Iredale, 1939)
IREDALE, T. 1939. Mollusca. Part 1. In Great Barrier Reef Expedition 1928-29, B.M.(N.H.), Scientific Reports, 5 (6): 209-425, pls. 1-7. [p. 350, pl. 5, figs. 22, 22a]
1939 Mimachlamys deliciosa Iredale, 1939
1971 Chlamys princessae Kuroda, Habe & Oyama, 1971
1971 Chlamys princessae Kuroda, Habe & Oyama, 1971
T. Iredale, 1939, plate 5.
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«Shell very small, equivalve, a little inequilateral, both valves convex, ears very unequal, sculpture prickly. The coloration is uniform, orange brick. For comparison Pecten sentis Reeve ('Conch. Icon.' VIII, pl. xxix, sp., fig. 125, June, 1853), from unknown locality, may be cited, but Reeve's shell is much broader and more subcircular. The sculpture consists of about twenty-two primary ribs, which are almost doubled by intercalating ribs with age. All the ribs are ornamented with erect prickly scales very regularly but not closely placed, the scales never developing scalloping nor overlapping. The interstices between the ribs appear to be smooth; the initial smooth umbonal portion is very small, and the radial ribs begin rather strongly, almost immediately, no concentric striation nor radial scratching being observed, but the right valve shows somewhat rude concentric growth stages. The radials on the ears number nine to twelve, and the ctenolium is strongly toothed, the byssal gape rather small. The hinge for such a small shell, is strong, the two cardinal crura well developed and closely denticulate. Height 17 mm., breadth 14 mm., depth of conjoined valves 6.5 mm. Habitat, Low Isles, Station 14, five complete specimens. This small species is easily separated from the young of any of the larger species by means of its complex sculpture.»
TOM IREDALE, 1939
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«Habitat. Living in the littoral zone to the upper bathyal zone, amongst coral rubble on sandy or muddy sand bottoms. Surface of many specimens encrusted with sponges.
Distribution. Subtropical-tropical Indo-West Pacific, from southern Japan to northern Australia, westward into the Indian Ocean to Mozambique and South Africa (not recorded from the Red Sea, Arabian Sea and Persian Gulf), and eastwards across the Pacific to the Fiji Islands (Raines & Poppe, 2006: 200); Africa to Japan, 35–390 m (Huber, 2010: 207); Mozambique, 80 m, South Africa, 10–100 m (Dijkstra & Kilburn, 2001: 289); Philippines, c. 80 m (Dijkstra, 2013: 66); Indonesia, 80–212 m (Dijkstra, 1991: 30; Dijkstra & Kastoro, 1997: 268); Solomon Islands, 120–655 m, dead; Norfolk Ridge, 180–250 m, dead (Dijkstra & Maestrati, 2008: 106); Vanuatu, 45–101 m (Dijkstra & Maestrati, 2012: 399). Maximum depth range of live-taken specimens 10–390 m. Present specimens from Australia alive at 34.5 m.
Remarks. The present specimens from western and eastern Australia are indistinguishable from the type of Laevichlamys deliciosa. Typical specimens are strongly oblong, but the shape (subcircular to elongate) and convexity (strongly inflated to more flattened) of this species are rather variable.»
DIJKSTRA, H. H. & A. G. BEU. 2018. Living scallops of Australia and adjacent waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae). Records of the Australian Museum, 70 (2): 113-330, figs. 1-102. [p. 243]
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Laevichlamys deliciosa (Iredale); H. H. Dijkstra & A. G. Beu, 2018, Living scallops of australia and adjacent waters, figures 67G-67J, 69A, 69B.
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«Description. — Shell up to 25 mm high, most specimens under 20 mm; a few specimens subcircular, most oblong, somewhat prosocline, right valve slightly more inflated than left, almost equivalve and equilateral, auricles very unequal in shape and size, umbonal angle c. 80-85˚; uniform cream, orange (most specimens), yellow, pink or purple, some specimens patterned with darker rays or blotches. Both valves sculptured with numerous fine, unevenly spaced, spinous radial riblets, increasing to c. 45-50 by intercalating riblets towards ventral margin in adult stage. Radial interspaces bearing granulate or reticulate microsculpture in early radial stage, smooth in late radial stage near ventral margin. Anterior auricles long, bearing 9-14 delicate radial riblets, posterior auricles very short with fewer (6-10) still more delicate riblets. Anterior auricle of left valve somewhat declined near disc flank. Postero-dorsal margin of hinge line somewhat declivous. Byssal notch very weak, byssal fasciole narrow. Functional ctenolium well-developed, with c. 4-6 teeth.
Distribution. — Subtropical-tropical Indo-West Pacific, from southern Japan southwards to northern Australia, westward into the Indian Ocean to Mozambique and South Africa (not recorded from the Red Sea, Arabian Sea and Persian Gulf), and eastwards into the Pacific to the Fiji Islands (Raines & Poppe, 2006: 200). Present specimen from the Philippines alive at c. 80 m. Living amongst coral rubble on sandy or muddy sand bottoms. Shell surface often encrusted with sponges. Remarks. — The present specimens from the Philippines are indistinguishable from the type material. Typical specimens are strongly oblong, but the shape (subcircular to elongate) and convexity (strongly inflated to more flattened) of this species are rather variable.» 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. 66]
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Laevichlamys deliciosa (Iredale, 1939); H. H. Dijkstra, 2013, Pectinoidea from the Panglao region, plate 17, figures 2a-2d.
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