PECTINIDAE

Delectopecten polyleptus

(Dall, 1908)

Figures

 

    

Holotype (rv)

Original name   Pecten (Pseudamusium) polyleptus Dall, 1908
Autoreference   Dall, 1908: 403, pl. 10, fig. 9.
Reference   Dall, W.H., 1908. Reports on the dredging operations off the West coast of Central America to the Galapagos, to the West coast of Mexico, and in the Gulf of California, [...] by the [...] "Albatross" [...] and Reports on the [...] Expedition to the eastern tropical Pacific [...] by the [...] "Albatross" [...] Reports on the Mollusca and Brachiopoda. - Bulletin of the Museum of Comparative Zoology 43: 205-487, 22 pls.
Type data   Holotype (rv: H 9.5 mm, L 9.5 mm) Smithsonian Institution, National Museum of Natural History, Washington DC (USNM 110586). Type locality: Galapagos Islands, SE of Isla Espanola, 01*30'30"S, 89*35'00"W, 549 m, dead, globigerina sand, 07.xi.1904 (RV "Albatross" stn 4642).
Description

  Shell up to ca. 10 mm high, thin, circular, weakly inflated, equilateral, anterior auricle larger than posterior, umbonal angle ca. 95 degrees, semi-transparent, whitish.

  Right valve with antimarginal microsculpture and ca. 36 radial rows of scales, more prominent near margin. Posterior auricle continuous with disc and anterior auricle demarcated from disc with 5 radial rows of scales and commarginal striation. Byssal notch deep, byssal fasciole broad, ctenolium well-developed with 3 teeth.

  Left valve described by Grau (1959: 43) probably belongs to this species.

Distribution

 

Galapagos Islands (TL)

Habitat   Probably living bathyally on soft bottom assemblages.