Annachlamys kuhnholtzi (Bernardi, 1860)
BERNARDI, A. C. 1860. Description d'spèces nouvelles. Journal de Conchyliologie [2e Série], 4: 378-381, pl. 13. [p. 378, pl. 13, fig. 1]
A. C. Bernardi, 1860, plate 13.
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«Testa rotundata,subequilatera et subequivalvis, radiatim costata, costis circiter 22, convexis, rolundatis; interstitiis dense, eleganler et transversim striatis; auriculis vix costatis, striatis, aequalibus; valvae infernae area externa albo et rufo alternatim radiata; valvae supernae area externa omnino alba: pagina interna valvarum rufo-maculata, fortiter costata, costis elevatis, longitudinaliter canaliculatis, ad margines dentiformibus; denlibus 2 validis ad basin auricularum, munitis.
Diam. ant. post. 72 mill. Altit. — 65 -- "Coquille arrondie, subéquilatérale et subéquivalve, portant 22 côtes rayonnantes, arrondies. Les interstices sont transversalement et finement striés; oreillettes égales, striées; la valve inférieure est alternativement teinte de rayons blancs et roux; la supérieure est entièrement blanche, un peu jaunâtre vers les crochets. L'intérieur des valves est remarquable par la présence de fortes côtes, dentiformes, canaliculées, correspondant aux interstices de la surface extérieure; de chaque côté, à la base des auricules on trouve un fort tubercule." Hab. Nouvelle-Calédonie (Collection du journal.) Observ. Nous dédions cette belle espèce à M. Kuhuholtz; elle n'a de rapports qu'avec le Pecten Reevi A. Adams, des mers de la Chine.» A. C. BERNARDI, 1860
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«Description. Most specimens up to c. 50 mm high, a few specimens to c. 100 mm; solid, moderately inflated, juveniles circular, adults subcircular (wider than high), right valve slightly more convex than left, inequivalve, equilateral (juveniles) to more prosocline (adults), auricles of the two valves unequal, umbonal angle 105–120°. Left valve blotched with red or brown on cream background, some specimens with dark red or brown radial streaks on plicae. Right valve paler or whitish with yellow umbonally. Interior yellowish or reddish yellow.
Both valves sculptured with 18–20 evenly spaced radial plicae. Plicae of right valve somewhat broader and more rounded in cross-section than those of left valve. Interspaces of left valve wider than those of right valve. Commarginal microsculpture of closely spaced lamellae, polished where they cross plicae on most specimens. Posterior auricles somewhat larger than anterior auricles, with very weak radial costae in early growth stage, no costae present later. Delicate commarginal lamellae on both auricles. Dorsal margin of left valve straight, of right valve more declined. Internal rib carinae prominent near ventral margin, weaker near muscle insertion. Resilifer narrowly triangular. Hinge teeth prominent, consisting of one resilial tooth and one dorsal tooth on each side in right valve, and corresponding sockets in left valve. Byssal notch and ctenolium weak in juveniles, lacking in adults. Dimensions. Illustrated specimens: QLD, off Burnett Heads, 46 m (AM C.064359): rv: H 61.0, L 66.5 mm; lv: H 60.1, L 68.2 mm; D 22.7 mm; lectotype of Pecten kuhnholtzi, New Caledonia (MNHN Moll21203): lv: H 66.5, L 71.5 mm; D 24.7 mm.
Habitat. Living free (not byssally attached to substrate) in the littoral zone to on the continental shelf, in colonies on soft sediment (sand and/or mud).
Distribution. Eastern Australia, Coral Sea, New Caledonia and Lord Howe Island, alive at 10–69 m (Dijkstra & Marshall, 1997: 99). Maximum depth range 4–120 m (unpublished data HHD). Present material from northern Queensland (Cape York Peninsula) southwards to northern New South Wales (Brunswick Heads), living at 4–60 m.
Remarks. Annachlamys kuhnholtzi is often treated as a geographical morph of A. flabellata (see also Lamprell & Whitehead, 1992). However, specimens of the two species do not interbreed and no intermediate variations have been observed.
Table 3 lists the characters distinguishing Annachlamys kuhnholtzi from A. flabellata.» 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]
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Annachlamys kuhnholtzi (Bernardi); H. H. Dijkstra & A. G. Beu, 2018, Living scallops of australia and adjacent waters, figures 51D, 51E, 51G, 51H, 54A, 54B, 54D, 54E.
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«Remarks: Annnachlamys leopardus rena Iredale, 1939, based on material from Queensland, is indistinguishable from the holotype and other New Caledonian specimens of A. kuhnholtzi, and we consider them synonyms. Allopatric populations of A. flabellata from Australia will be discussed elsewhere. The present material from Lord Howe Island is similar to the type specimen of P. kuhnholtzi.»
DIJKSTRA, H. H. & B. A. MARSHALL. 1997. Pectinoidea (Mollusca: Bivalvia: Propeamussiidae: Pectinidae) of Lord Howe Island, Norfolk Island and the Kermadec Islands. Molluscan Research, 18 (1): 73-114, figs. 1-13. [p. 99]
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Annachlamys kuhnholtzi (Bernardi. 1860).; H. H. Dijkstra & B. A. Marshall, 1997, Pectinoidea (Mollusca: Bivalvia: Propeamussiidae: Pectinidae) of Lord Howe Island, Norfolk Island and the Kermadec Islands, plate 11.
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