PROPEAMUSSIIDAE  

Parvamussium carbaseum

Dijkstra, 1991

Figure(s)

   

    

Holotype (lv)

Original name   Parvamussium carbaseum Dijkstra, 1991
Autoreference   Dijkstra, 1991: 9, figs 11-21.
Reference   Dijkstra, H.H., 1991. A contribution to the knowledge of the pectinacean Mollusca (Bivalvia: Propeamussiidae, Entoliidae, Pectinidae) from the Indonesian Archipelago. - Zoologische Verhandelingen 271: 1-57, figs 1-91. Leiden.
Type data

  Holotype (lv: H 4.4 mm, L 4.5 mm) Naturalis - National Museum of Natural History, Leiden (RMNH 56534). Type locality: Indonesia, Banda Sea, NW of Binongko, Tukang Besi Islands, 05*54.0'S, 123*58.4'E, 390 m, dead, calcareous sand, 10.09.1984 (SNELLIUS-II stn 4.031).

Description

  Shell up to ca. 4 mm high, fragile, semi-transparent, weakly inflated, subcircular, somewhat wider than high, left valve slightly more convex than right valve, inequivalve, nearly equilateral, anterior auricles larger than posterior, unequal in shape, internal ribs ca. 15 with some intercalated rudimentary riblets, umbonal angle ca. 105 degrees, colour milky white.

  Left valve with ca. 25 radial costae lirae with small tubercles and very closely spaced commarginal lamellae, less conspicuous than costae. Anterior auricle with coarse commarginal lirae, weaker on posterior auricle.

  Right valve with closely spaced minute commarginal lamellae. Posterior auricle with coarse commarginal lirae, weaker on anterior auricle with some radial riblets. Byssal notch shallow, byssal fasciole narrow and ctenolium lacking.

Distribution

 

Japan, Indonesia, Flores Sea, Banda Sea (TL), Arafura Sea

Habitat  Probably living bathyally on soft bottom assemblages.