PROPEAMUSSIIDAE

Parvamussium caesicium

Dijkstra & Moolenbeek, 2008

Figures

 

  Holotype (lv)

                          

Original name   Parvamussium caesicium Dijkstra & Marshall, 2008
Autoreference   Dijkstra & Moolenbeek, 2008: 16, figs 1-4.
Reference   Dijkstra, H.H. & R.G. Moolenbeek, 2008. Some Pectinoidea (Bivalvia: Propeamussiidae and Pectinidae) from the Berau Islands (East Kalimantan, Indonesia). - Venus 67 (1-2): 15-26, 10 figs.
Type data   Holotype (lv: H 3.2 mm, L 3.2 mm) Zoological Museum Amsterdam (ZMA Moll. 404023). Type locality: Indonesia, Kalimantan, Berau Islands, Kakaban Island, NE-side, entrance of tidal lake, Kehe Daing, 02*08'53.2"N, 118*32'31.6"E, 10-25 m, dead, scuba diving, 28.x.2003. (Netherlands Berau Expedition - NBE stn 35).
Description

  Shell small up to ca. 3 mm high, fragile, semi-transparent, weakly inflated, circular, inequivalve, almost equilateral, valves equally convex, auricles dissimilar in shape, anterior auricle of rv considerable larger than posterior one, umbonal angle ca. 110 degrees, translucent white. Left valve with commarginal lamellae in early growth stage, and radial ribs (commencing with ca. 15, increasing to ca. 30 marginally). Right valve with commarginal lirae throughout disc. Byssal notch shallow, byssal fasciole lacking. Internal riblets 10-11, plus a few rudimentary.

Distribution

 

Indonesia, Kalimantan, Berau Is., Kakaban Island (TL)

Habitat   Shells littorally amongst rubble and shell grit on sandy bottom.