PROPEAMUSSIIDAE  

Parvamussium araneum

Dijkstra, 1991

Figure(s)

   

lv-outside                               lv-inside

Holotype

Original name   Parvamussium araneum Dijkstra, 1991
Autoreference   Dijkstra, 1991: 8, figs 3-10.
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 (pr: H 8.9 mm, L 9 mm, D 1.3 mm) Naturalis - National Museum of Natural History, Leiden (RMNH 56531). Type locality: Indonesia, NE coast of Sumba, E of Melolo, 09*51.8'S, 120*46.4'E, 240 m, alive, 14.09.1984 (SNELLIUS-II stn 4.060).

Description

  Shell up to ca. 9 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 rudimentary, umbonal angle ca. 105 degrees, colour milky white.

  Left valve with reticulated sculpture of regularly spaced radial costae (ca. 25) and commarginal lamellae, less conspicuous than costae. Auricles also with reticulated sculpture.

  Right valve with closely spaced commarginal lirae. Byssal notch shallow, byssal fasciole narrow and ctenolium lacking.

Distribution

 

Indonesia, Flores Sea (TL), Banda Sea, Vanuatu Archipelago

Habitat  Living bathyally on soft bottom assemblages.