Anguipecten picturatus Dijkstra, 1995

Dijkstra, H. H. & Kilburn, R. N., 2001, The family Pectinidae in South Africa and Mozambique (Mollusca: Bivalvia: Pectinoidea), African Invertebrates 42, pp. 263-321 : 273-274

Anguipecten picturatus Dijkstra, 1995

( Fig. 7 )

Pecten aurantiacus A. Adams & Reeve, 1850 (non Röding, 1798, nec J. Sowerby, 1820, nec Defrance,

1825): 74, pl. 21, fig. 12; Reeve, 1853: pl. 26, fig. 105. Type locality: ‘ China Sea’ (herein emended to South China Sea) .

Anguipecten lamberti (non Pecten lamberti Souverbie in Souverbie & Montrouzier, 1874); Abbott & Dance,

1982: 312, fig.; Higo & Goto, 1993: 576.

Anguipecten picturatus Dijkstra, 1995 b: 17 (nomen novum for Pecten aurantiacus Adams & Reeve, 1850 ,

non Röding, 1798); 1998: 14, pl. 2, fig. 1 (references, type data, distribution, discussion).

Description: Shell up to ca. 50 mm high, usually ca. 40 mm, solid, oblong, sometimes oblique, inequilateral, auricles small and slightly unequal, umbonal angle 85–90°. Both valves somewhat compressed, RV more convex, with 12–14 regularly placed primary radial costae, on RV somewhat broader than on LV, secondary squamose radial riblets on entire disc in late radial stage, rib intervals on LV somewhat broader than on RV, commarginal lamellae in early radial stages. Auricles with fine radial riblets near disc flank, on posterior more prominent. Hinge small, straight. Byssal notch and fasciole weak. Active ctenolium with 2–4 small teeth. Resilifer elongate, triangular. Auricular crura strongly developed. Inner surface slightly plicated. Colour variable, valves marbled with yellow, rose, orange, pink, RV somewhat paler than LV.

Type material: Holotype BMNH 1950.11.14.8; seen by HD.

Regional data: SOUTH AFRICA: Zululand: off Rocktail Bay, 100 m, sand, dead ( NMSA: S5160 ) .

Distribution: Throughout the Indo-West Pacific from S Japan to N Australia and W Indian Ocean, as far south as northern Zululand.

Habitat: Living free amongst coral rubble or under coral slabs on sandy bottoms, usually littorally.

Remarks: The present specimen from Zululand agrees with the type material of Pecten aurantiacus . This is a new record for South Africa, although no live examples are yet known from the region.

Figures

Fig. 7. Anguipecten picturatus Dijkstra, 1995: NMSA S5160, off Rocktail Bay, Zululand, 100 m, 39.7 x 36.8 mm, RV exterior.