PROPEAMUSSIIDAE  

Parvamussium fenestratum

(Forbes, 1844)

Figure(s)

       

Original name   Pecten fenestratus Forbes, 1844
Autoreference   Forbes, 1844: 146, 192.
Reference   Forbes, E., 1844. Report on the Mollusca and Radiata of the Aegean Sea, and on their distribution, considered as bearing on geology. - Report of the British Association for the Advancement of Science for 1843: 130-193.
Type data

  Syntypes in Royal Scottish Museum, Edinburgh (RSM 1976.5.31902-3). Type locality: "Cyclades, Asia Minor". See also Smaldon, Heppell & Watt (1976: 51).

Description

  Shell up to ca. 7 mm high, fragile, semi-transparent or opaque, weakly inflated, subcircular, inequivalve, nearly equilateral, anterior auricles slightly larger than posterior, unequal in shape, internal ribs 14-20 (variable in size and number), umbonal angle ca. 95 degrees, colour creamy and maculated with white and brown dots, or monochrome milky white.

  Left valve with reticulated sculpture of ca. 10 irregularly spaced radial ribs and closely spaced overrunning commarginal lamellae. On intersections squamae. Auricles with coarse commarginal lamellae.

  Right valve with very closely spaced obsolete commarginal lamellae or lirae. Byssal notch well-developed, byssal fasciole very narrow and ctenolium lacking.

Distribution

 

Eastern Atlantic (ca. 50*-14*N), Mediterranean Sea, Aegean Sea (TL)

Habitat  Living bathyally on soft bottom assemblages.