Parvamussium diomedeum

(Dall, Bartsch & Rehder, 1938)


  Holotype                                                                Dr E. Strong - NMNH

Original name   Propeamussium diomedeum Dall, Bartsch & Rehder, 1938
Autoreference   Dall, Bartsch & Rehder, 1938: 83, pl. 20, figs 3-4; pl. 21, figs 1-4.
Reference   Dall, W.H., Bartsch, P. & Rehder, H.A., 1938. A manual of the Recent and fossil marine pelecypod mollusks of the Hawaiian Islands. - Bernice P. Bishop Museum Bulletin 153: i-iv, 1-233, pls 1-58.
Type data

  Holotype (pr: H 6.5 mm, L 6.5 mm, D 2.2 mm) Smithsonian Institution, National Museum of Natural History, Washington DC (USNM 190442). Type locality: Hawaiian Islands, Pailolo Channel between Molokai and Maui, 507-519 m, alive, globigerina ooze, 08.iii.1902 (USBFS "Albatross" stn 3883).


  Shell up to ca. 6.5 mm high, fragile, semi-transparent, weakly inflated, circular, inequivalve, nearly equilateral, anterior auricles slightly larger than posterior, unequal in shape, internal ribs 10 with a few intercalated rudimentary riblets near the ventral margin, umbonal angle ca. 105 degrees, colour dirty white.

  Left valve with numerous obsolete radial threads and commarginal lamellae. Right valve with closely spaced weak commarginal lirae. Byssal notch shallow, byssal fasciole and ctenolium lacking.



Hawaiian Islands (TL)

Habitat  Living bathyally on soft bottom assemblages.