PROPEAMUSSIIDAE  

Parvamussium octodecimliratum

(Melvill & Standen, 1907)

Figure(s)

   

lv (exterior)                                                rv (interior)

    Holotype

 

Original name   Amussium octodecimliratum Melvill & Standen, 1907
Autoreference   Melvill & Standen, 1907: 147, figs 17-17a.
Reference   Melvill, J.C. & R. Standen, 1907. The marine Mollusca of the Scottish National Antarctic Expedition. - Transactions of the Royal Society of Edinburgh 46: 119-157.
Type data   Holotype (pr: H 9.8 mm, L 12.2 mm, D 3.1 mm) The Royal Scottish Museum at Edinburgh (RSM 1921.143.708).Type locality: Antarctic, Weddell Sea, 67*33'S, 36*35'W, 4573 m, alive, trawl ("Scotia" stn 291).
Description

  Shell small up to ca. 10 mm high, fragile, semi-transparent whitish, weakly inflated, subcircular, wider than high, inequivalve, equilateral, auricles slightly equal in size.

  Left valve sculptured with radial threads and delicte commarginal lamellae, cancellated with quadrate interstices. Right valve with closely spaced, fine commarginal lamellae. Internal prominent riblets 18, regularly arranged. Byssal notch weak, byssal fasciole narrow.

Distribution

 

Antarctica (TL)

Habitat  Living abyssally on soft bottom assemblages.