Annachlamys reevei (Adams in Adams & Reeve, 1850)
ADAMS, A. & L. A. REEVE. 1848-1850. Mollusca. In: A. Adams (ed.), The zoology of the voyage of the H.M.S. Samarang under the command of Captain Sir Edward Belcher, C.B., F.R.A.S., F.G.S. during the years 1843-1846. Reeve, Benham & Reeve, London, x + 87 + [ii] pp., pls. 1-24. [p. 73, pl. 21, figs. 1a-b]
1850 Annachlamys reevei (Adams in Adams & Reeve, 1850)
A. Adams & L. A. Reeve, 1848-1850, plate 21.
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«1. PECTEN REEVEI. PI. XXI. Fig. 10 a, b. Pect. testâ aequivalvi, subaequilaterâ, suborbiculari, paululum longiore quam altâ, albâ, carmineo vividè variegatâ et radiata et violaceo maculatâ; costatâ, costis ad viginti, latiusculis, lineis concentricis elevatis minutè et densissimè decussatis, auriculis subaequalibus, intus vividè carmineâ et albâ. ADAMS, MS.
HAB. China Sea. Several specimens of this magnificent new Pecten were collected in the China Sea, all more or less brilliantly coloured in the manner described.» ARTHUR ADAMS, 1850
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«Description. Shell up to c. 60 mm high, solid, weakly inflated, right valve slightly more convex than left, subcircular (somewhat wider than high), inequivalve, almost equilateral (posterior suture longer than anterior); auricles rather small, almost equal in size; umbonal angle 115–120°; left valve brightly coloured with red, yellow, pink, purple or orange maculations and streaks on a whitish or cream background, right valve less maculated, paler; reddish internally.
Both valves sculptured with 16–18 evenly spaced radial plicae (becoming smaller and weaker at anterior and posterior ends of disc than in centre), plicae broader than interspaces. Delicate, closely spaced commarginal lamellae in early growth stage, more prominent and more widely spaced in late ontogeny, subdivided by a secondary riblet on crest of plicae of some specimens. Auricles with 4–6 evenly spaced radial riblets covered with commarginal lamellae. Internal rib carinae prominent near ventral margin, weaker near muscle insertion. Dorsal margin of left valve straight, somewhat inclined in right valve. Hinge teeth prominent. Byssal notch shallow, byssal fasciole lacking, functional ctenolium with 3–5 teeth in juvenile stage, lacking in adult. Dimensions. Illustrated specimens: WA, Ningaloo Marine Park, off Osprey Reef, 58.6–57.8 m (WAM S64890), rv only: H 33.2, L 36.5 mm; WA, Ningaloo Marine Park, off Cloates Reef, 40–44 m (WAM S64891), lv only: H 41.3, L 47.3 mm.
Habitat. Living free in adult stage, in the littoral zone and on the continental shelf, amongst rubble on soft sediment (generally sand).
Distribution. Sea of Enshunada and Izu Islands (Japan), southwards to tropical West Pacific, 10–50 m (Hayami, 2000: 905); Sulu Sea, Philippines, 5–10 m (Springsteen & Leobrera, 1986: 329; Raines, 2010: 598; Dijkstra, 2013: 53); Indonesia, 65–75 m, dead (Dijkstra, 1991: 43). Maximum depth range 10–150 m (Okutani et al., 1989: 63). Distribution herein extended to northern Australia. Present specimens from Australia alive at 36 m.
Remarks. Annachlamys reevei is a new record for Australia. Specimens from the Gulf of Carpentaria and Ashmore Reef are indistinguishable from the type material.
Annachlamys reevei closely resembes A. iredalei, but differs in several characters, as shown in Table 4.» 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. 217, 218]
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Annachlamys reevei (A. Adams); H. H. Dijkstra & A. G. Beu, 2018, Living scallops of australia and adjacent waters, figures 53E, 53G, 54C, 54F.
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«Distribution and ecology.— Only known from southern Japan to the Indonesian Archipelago; living on sandy bottoms with sediments at littoral depth.
Remarks.— The present material corresponds very well with the type specimens from the China Sea (BM(NH) 74.12.11.375, syntype; BM(NH) 1950.11.14.58, syntypes), apart from being less red coloured, which is caused by encrustment of the dead specimens, however. A rather similar species is Annachlamys iredalei (Powell, 1958), only known from the Kermadec Islands, New Caledonia, and the Coral Sea.» DIJKSTRA, H. H. 1991. A contribution to the knowledge of the pectinacean Mollusca (Bivalvia: Propeamussiidae, Entoliidae, Pectinidae) from the Indonesian Archipelago. Zoologische Verhandelingen, 271: 1-57, figs. 1-91. [p. 43]
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«P. reevei REEVE, Conch. Icon., Vol. 8, PI. 23, Bp. 91, 1853: Chlamys (Aequipecten) reevei SUGITANI, Cat. Luchu Shells. p.45, 1927: P. (Chlamys) reevei KURODA, Cat. Shell-bearing Moll. Amami-Osima, p.5, No. 48, 1928.
5 valves; a perfect right valve 46 mm. in height, 49 mm. in length and 7 mm. in depth. Reg. No. 50356.
Living: Western Honsyu to Ryukyu Islands. China. Sooloo Archipelago.» NOMURA, S. & N. ZINBÔ. 1934. Marine Mollusca from the "Ryûkyû Limestone" of Kikai-zima, Ryûkyû Group. The Science Reports of the Tōhoku University [2nd. Series -Geology], 16 (2): 109-164, pI. 5. (p. 116)
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Pecten (Aequipecten) reevei Adams et Reeve, 1850; S. Nomura & N. Zinbô, 1934, Marine Mollusca from the "Ryûkyû Limestone" of Kikai-zima, Ryûkyû Group, plate 5, figure 8.
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«Le P. Reevei, encore très rare dans les collections, est voisin du P. macassarensls Chenu et on sera peut être amené, lorsqu'on en possédera de nombreux exemplaires à ne le considérer que comme une variété extrême de cette espèce.
Dispersion. N'était connu jusqu'à présent que des mers de Chine.» DAUTZENBERG, P. & A. BAVAY. 1912. Les lamellibranches de l'Expédition du Siboga. Partie Systématique I: Pectinidés. Monographie Siboga-Expeditie, 53b E. J. Brill, Leiden: 1-41, pls. 27, 28. [p. 19]
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Pecten (Aequipecten) Reevei Adams; P. Dautzenberg & A. Bavay, 1912, Les lamellibranches de l'Expédition du Siboga, plate 27, figures 3, 4.
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