PECTINIDAE

Parvamussium nesiotum

(Dall, Bartsch & Rehder, 1938)

Figures

   Holotype                                                                  © Dr E. Strong - NMNH

        

Original name   Propeamussium nesiotum Dall, Bartsch & Rehder, 1938
Autoreference   Dall, Bartsch & Rehder, 1938: 81, pl. 19, figs 12-15, pl. 20, fig. 7.
Reference   Dall, W.H., P. Bartsch & H.A. Rehder, 1939. A manual of the Recent and fossil marine pelecypod mollusks of the Hawaiian Islands. - Bulletin of the Bernice P. Bishop Museum 153: i-iv, 1-233, pls 1-58.
Type data   Holotype (pr: H 4.9 mm, L 5.1 mm, D 3.0 mm) Unites States National Museum (USNM 190441). Type locality: Hawaiian Islands, off S-coast Molokai, 21*08'N, 157*00'W, 110-117 m, trawled alive, 08.iv.1902 (USBFS "Albatross" stn 3846).
Description

  Shell small up to ca. 5 mm high, fragile, opaque whitish, inflated, circular, inequivalve, almost equilateral, auricles slightly unequal in size, umbonal angle ca. 105 degrees.

  Left valve sculptured with radial and commarginal threads. Auricles with four radial threads and commarginal lamellae. Right valve with narrow spaced, delicate commarginal lamellae. Internal riblets 12,nearly rregularly placed. Byssal notch relatively deep, byssal fasciole narrow.

Distribution

 

Hawaiian Islands (TL)

Habitat   Shell upper bathyally on sand and gravel bottom.