PROPEAMUSSIIDAE  

Parvamussium squalidulum

Dijkstra, 1995

Figures

 

       rv                     Holotype                           lv

Original name   Parvamussium squalidulum Dijkstra, 1995
Autoreference   Dijkstra, 1995: 32, figs 47-50.
Reference   Dijkstra, H.H., 1995. Bathyal Pectinoidea (Bivalvia: Propeamussiidae, Entoliidae, Pectinidae) from New Caledonia and adjacent areas. In: P. Bouchet (ed.), Résultats des Campagnes MUSORSTOM, volume 14. - Mémoires du Muséum National d'Histoire Naturelle 167: 9-73, figs 1-154.
Type data   Holotype (pr: H 11.1 mm, L 11.4 mm, D 2.0 mm) Museum National d'Histoire Naturelle, Paris (MNHN). Type locality: Lord Howe Rise, Kelso Bank, 24*11'S, 159*35'E, 270 m, alive (MUSORSTOM 5 stn DW 277).
Description

  Shell small up to ca. 11 mm high, fragile, semi-transparent, weakly inflated, nearly circular, left valve slightly more convex than right valve, inequivalve and inequilateral, auricles strongly unequal in size, umbonal angle ca. 125 degrees, left valve creamy with whitish and orange-brownish spots, right valve whitish.

  Left valve sculptured with numerous, irregularly and closely spaced, scaly radial riblets, increasing in number towards the ventral margin. Auricles with fine a few radial riblets and delicate commarginal lamellae. Right valve with regularly spaced, fine commarginal lirae. Byssal notch relatively shallow, byssal fasciole narrow. Internal riblets 10 (irregularly spaced), extending to the submarginal region. Marginal apron (below the interior riblets) of right valve often broken off.

Distribution

 

E Indonesia, Lord Howe Rise (TL), Chesterfield Islands, New Caledonia, Loyalty Islands, Hebrides, Kermadecs

Habitat   Living bathyally on soft bottom assemblages.