Pascahinnites pasca ( Dall, 1908 )

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 : 347

Pascahinnites pasca ( Dall, 1908) ( Fig. 3L, M )

Pecten (Chalmys) [sic] pasca Dall, 1908: 401 .

Pascahinnites pasca — Dijkstra & Raines 1999: 200, figs 1, 2 [references, type data, description, habitat, comparison]. — Tröndlé & Boutet 2009: 6 [listed from Austral Is].

MATERIAL EXAMINED. — Easter Island . Holotype lv ( USNM 110765 ).

Marotiri. BENTHAUS, stn DW 1884, 27°54’S, 143°33’W, 570-620 m, 2 lv. — Stn DW 1885, 27°52’S, 143°33’W, 700-800 m, 1 lv.

DISTRIBUTION. — Formerly only known from Easter Island and considered as endemic. Austral Islands, only loose valves at 620-700 m depth.

REMARKS

The present specimens (free living stage) from Marotiri Islands are indistinguishable in all characters from the (non-cemented) type material from Easter Island.On Easter Island, the species lives sublittorally ( Dijkstra & Raines 1999) and the somewhat eroded valves from Marotiri were obviously displaced to bathyal depths.

Figures

FIG. 3. — A-D, Cyclochlamys australense n. sp.; A, holotype, external view of the left valve;B, holotype,external view of the right valve; C, idem (SEM); D, details of the right valve; E, prodissoconch and auricle (SEM); F-K, Lamellipecten aduncus n. sp.; F, G, holotype, external and internal views of the left valve; H, I, holotype, external and internal views of the right valve; J, prodissoconch and early stage of the left valve (SEM); K, details of the left valve (SEM); L, M, Pascahinnites pasca (Dall,1908); L, external view of the left valve; M, details of the left valve. Scale bars: C, 200 μm; D, 50 μm; E, J, 100 μm; K, M, 1 mm.