Talochlamys gemmulata (Reeve, 1853)
REEVE, L. A. 1852-1853. Monograph of the genus Pecten. In: L. A. Reeve (Ed.), 1843-1878, Conchologia Iconica; or illustrations of the shells of molluscous animals, vol. 8. [unnumbered pages], pls. 1-35. London. [sp. 111, pl. 27, fig. 111]
1853 Pecten gemmulatus Reeve, 1853
1853 Pecten gemmeus Reeve, 1853
1873 Pecten radiatus Hutton, 1873
1933 Pecten (Chlamys) suteri Hertlein, 1933 [nomen novum pro Pecten radiatus Hutton, 1873]
1853 Pecten gemmeus Reeve, 1853
1873 Pecten radiatus Hutton, 1873
1933 Pecten (Chlamys) suteri Hertlein, 1933 [nomen novum pro Pecten radiatus Hutton, 1873]
L. A. Reeve, 1853, plate 27.
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«PECTEN GEMMULATUS. Pect. testâ subtrigono-orbiculari, tenui, compressâ, aequilaterali, subaequivalvi, radiatim densè liratâ, liris hic illic majoribus, undique pulcherrimè minuti muricato-serratis; albidâ, carneo-roseo tinctâ; auriculis valdè inaequalibus.
THE FINELY-BEADED PECTEN. Shell somewhat triangularly orbicular, thin, compressed, equilateral, nearly equivalve, radiately densely ridged, ridges here and there larger, very beautifully minutely prickly serrated throughout; whitish, stained with flesh-rose; ears very unequal. Hab. New Zealand. A thin rather fragile species, very delicately but densely prickly-serrated throughout.» LOWELL AUGUSTUS REEVE, 1853
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«Talochlamys gemmulata attains larger size in the south of its range (radiatus = suteri form) than in the north, notably at Stewart Island (height up to 68 mm, M.19561): the largest living specimen seen from north of East Otago is 46 mm high (Cook Strait, M.7792). Whereas no living North Island specimen seen is higher than 37 mm (off Bream Bay, M.155225), old-looking (bleached or stained) specimens up to 59 mm high, indistinguishable from the southern suteri form, have been dredged with accumulations of similarly preserved shells from off Te Arai Point, Northland (suction-dredged sand from 38-40 m depth used for beach formation at Mission Bay, Auckland; valves up to 49 mm high, M.138177), Rangatira and Rungagapapa knolls, off White Island (188-235 m, up to 56 mm high, M.60055; and 188-228 m, up to 58 mm high, M.64846 respectively), the southeastern slope of Ranfurly Bank, East Cape (143-153 m, up to 62.5 mm high, M.76071), and from west of Kapiti Island (148 m, up to 58 mm high, M.7800). The sample from Rungapapa Knoll included numerous valves of a distinctive form of Pecten novaezelandiae, the oldest of which yielded 14C dates of up 28,400 YBP. The Ranfurly Bank dredging included abundant Zeacolpus cf. symmetricus (Hutton, 1873) (Turritellidae), which is unknown living north of East Otago, and numerous well preserved valves of the southern South Island-Foveaux Strait form of Ostrea chilensis Philippi in Küster, 1844 (Ostreidae). Evidently, therefore, the large suteri form is a response (directly or indirectly) to low sea temperature, and was expressed further north than at present during glacial maxima. Although common throughout most of its geographic range, T. gemmulata is rare off the northern tip of Northland (Cape Maria van Diemen to North Cape), entirely replaced by T. dichroa off the Three Kings Islands, and rare at Ranfurly Bank, where T. dichroa is the dominant Talochlamys species (see above).»
DIJKSTRA, H. H. & B. A. MARSHALL. 2008. The recent Pectinoidea of the New Zealand region (Mollusca: Bivalvia: Propeamusiidae,Pectinidae and Spondylidae). Molluscan Research, 28 (1): 1-88, figs. 1-70. [p. 58]
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Talochlamys gemmulata (Reeve, 1853); H. H. Dijkstra & B. A. Marshal, 2008, The recent Pectinoidea of the New Zealand region, figure 46.
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