PROPEAMUSSIIDAE  

Parvamussium pailoloum

(Dall, Bartsch & Rehder, 1938)

Figure(s)

Holotype                                                                 © Dr E. Strong - NMNH

 
Original name   Propeamussium pailoloum Dall, Bartsch & Rehder, 1938
Autoreference   Dall, Bartsch & Rehder, 1938: 82, pl. 19, figs 8-11, pl. 20, figs 5-6.
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 9.2 mm, L 9.5 mm, D 3.2 mm) Smithsonian Institution, National Museum of Natural History, Washington DC (USNM 173209). Type locality: Hawaiian Islands, Pailolo Channel, 21*10'40"N, 156*34'50"W, 518-519 m, alive,10.iv.1902 (USBFS "Albatross" stn 3866).

Description

  Shell up to ca. 9 mm high, fragile, semi-transparent, weakly inflated, circular, inequivalve, nearly equilateral, anterior auricles slightly larger than posterior, unequal in shape, internal ribs 10 commencing in late growth stage and are developed to the ventral margin, umbonal angle ca. 110 degrees.

  Left valve with weak commarginal lamellae, more widely spaced than of right valve. Right valve with closely spaced weak commarginal lirae. Byssal notch shallow, byssal fasciole and ctenolium lacking.

Distribution

 

Hawaiian Islands (TL)
Habitat  Living bathyally on soft bottom assemblages.