Propeamussium sibogai

(Dautzenberg & Bavay, 1904)




                                                  Figured holotype


Original name   Amussium sibogai Dautzenberg & Bavay, 1904
Autoreference   Dautzenberg & Bavay, 1904: 207, figs 1-4.
Reference   Dautzenberg, P. & A. Bavay, 1904. Description d'un Amussium draguˇ par le "Siboga" dans la mer de Cˇl¸bes. - Journal de Conchyliologie 52 (3): 207-211.
Type data   Figured holotype (pr: H 48.5 mm, L 50.4 mm, D 8.2 mm) Zoological Museum, University of Amsterdam, Amsterdam (ZMA Moll. 3.04.001). Type locality: Indonesia, Bali Sea, 07*15.0'S, 115*15.6'E, 289 m, alive, mud and broken shells, 14.iii.1899 ("Siboga" stn 12).

  Shell up to ca. 55 mm high, fragile, semi-transparent, weakly inflated, nearly circular, left valve slightly more convex than right valve, inequivalve, slightly inequilateral, oblique, gaping rather strongly, auricles smooth and relatively small and equal in size, colour left valve usually brownish, right valve creamy or whitish.

  Left valve with delicate commarginal growth lines, sometimes with some commarginal lamellae near ventral margin. Delicate radial lirae near posterior margin.

  Right valve with regularly and widely spaced commarginal lirae. Internal ribs generally 8, deep brown on left valve, paler and broader on right valve. Byssal notch and ctenolium lacking.



E South Africa, S Japan, Philippines, Indonesia (TL), Timor Sea, New Caledonia, Loyalty Islands, Kermadec Islands, Wallis & Futuna Islands, Vanuatu Archipelago

Habitat  Living bathyally on soft bottom assemblages.