Gloripallium spiniferum, , (Sowerby I, 1835

Dijkstra, Henk H. & Maestrati, Philippe, 2010, Pectinoidea (Mollusca, Bivalvia, Propeamussiidae, Entoliidae and Pectinidae) from the Austral Islands (French Polynesia), Zoosystema 32 (2), pp. 333-358 : 354

Gloripallium spiniferum

(G. B. Sowerby I, 1835) ( Fig. 5F )

Pecten spiniferus G. B. Sowerby I, 1835: 110 . — G. B. Sowerby II 1842: 74, pl. 20, figs 229, 230. — Reeve 1853: sp. 118, pl. 28, fig. 118 (text unpaginated).

Pecten pulcherrimus Gray in Gray & G.B. Sowerby I, 1839: 150 , pl. 41, figs 1-2.

Gloripallium spiniferum – Waller 1972: 240, pl. 4, figs 58- 63 (holotype). — Dijkstra 1989a: 15, figs. — Dijkstra & Kilburn 2001: 281.

MATERIAL EXAMINED. — Tuamotu Archipelago., Marutea, holotype spm ( BMNH 1950.11.14.69).

Banc Président Thiers. BENTHAUS, stn DW 1926, 24°38’S, 146°01’W, 50-90 m, 1 lv, 2 rv. — Stn DW 1932, 24°41’S, 146°02’W, 500-800 m, 2 lv, 1 rv. — Stn DW 1933, 24°41’S, 146°01’W, 500-850 m, 1 lv, 2 fragments. — Stn DW 1936, 24°40’S, 145°57’W, 80-100 m, 1 lv. — Stn DW 1937, 24°40’S, 145°56’W, 469-500 m, 1 lv.

Tubuai. BENTHAUS, stn DW 1959, 23°20’S, 149°30’W, 95-380 m, 1 lv. — Stn DW 1961, 23°21’S, 149°34’W, 470-800 m, 1 lv.

Banc Arago. BENTHAUS, stn DW 1984, 23°26’S, 150°44’W, 40 m, 1 lv.

Rurutu. BENTHAUS, stn DW 1995, 22°29’S, 151°22’W, 212-450 m, 2 lv, 3 rv. — Stn DW 1999, 22°25’S, 151°22’W, 270-500 m, 1 rv. — Stn DW 2003, 22°28’S, 151°19’W, 250-330 m, 2 lv, 4 rv. — Stn DW 2005, 22°28’S, 151°18’W, 680-1800 m, 1 lv.

DISTRIBUTION. — Society Islands, Tuamotu Archipelago and Marquesas Islands ( Dijkstra 1989a: 15; MNHN, unpubl. data). Living sublittorally under coral slabs or amongst coral rubble on sandy bottoms ( MNHN, coll. HD). Depth range 18-32 m (alive) (unpubl. data, coll. HD). Now also Austral Islands (new record), only single valves at 40-680 m depth .

DESCRIPTION

Shell up to c. 43 mm high, weakly inflated, nearly equiconvex, subcircular,inequivalve, nearly equilateral, auricles unequal, umbonal angle c. 85-90°, colour variable,milky white with white,orange, red or brown maculations, right valve paler and plain orange.

Both valves sculptured with 7 rounded radial lirae covered with curled lamellae on the left valve and more closely spaced on the right. Interspaced finely ridged. Byssal notch moderately deep. Functional ctenolium with c. 6 teeth.

REMARKS

The present specimens are indistinguishable from the holotype. The largest valve from the Austral Islands (stn DW 1926) is 40 mm in height, which is remarkably larger than the 23 mm holotype.

Figures

FIG. 5. — A, Cryptopecten sp. A, external view of the right valve; B, Anguipecten lamberti (Souverbie, 1874), external view of the left valve; C, Anguipecten picturatus Dijkstra, 1995, external view of the left valve; D, Anguipecten superbus (Sowerby II, 1842), external view of the right valve; E, Glorichlamys elegantissima (Deshayes, 1863), external view of the right valve; F, Gloripallium spiniferum, (Sowerby I, 1835), external view of the right valve; G, H, Mirapecten mirificus (Reeve, 1853), external views of the left and right valves.