PECTINIDAE

Hyalopecten profundicola

(Okutani, 1962)

Figures

 

    

Holotype

Original name   Delectopecten profundicola Okutani, 1962
Autoreference   Okutani, 1962: 16, pl. 5, figs 4-4a.
Reference   Okutani, T., 1962. Report on the archibenthal and abyssal lamellibranchiate Mollusca mainly collected from Sagami Bay and adjacent waters by the R.V. Soyo-Maru during the years 1955-1960. - Bulletin of the Tokai Regional Fisheries Research Laboratory, Tokyo 32: 1-40, 5 pls.
Type data   Holotype (pr: H 5.0 mm, L 4.5 mm, D 2.0 mm) National Science Museum, Tokyo (NSMT-Mo 69702). Type locality: 56 miles off Aogashima Island, 32*20.0'N, 140*55.5'E, 3150-3350 m, alive, 08.xi.1959 ("Soyo-Maru" stn b).
Description

  Shell up to ca. 5 mm high, thin, semi-transparent, inflated, commarginally undulated, right valve more convex than left valve, strongly oblique, inequivalve, inequilateral, auricles unequal in size and shape, umbonal angle ca. 90 degrees, colour brownish white.

  Left and right valve with irregularly spaced prominent commarginal lamellae and intercalated slosely spaced delicate radial threads. Auricles with commarginal lamellae, posterior auricles continuous with disc, anterior auricle of right valve demarcated from disc.

Byssal notch relatively deep, byssal fasciole very narrow, ctenolium obsolete.

Distribution

 

Japan (TL)

Habitat   Living abyssally on soft bottom assemblages.