PROPEAMUSSIIDAE  

Propeamussium manaricum

(Smith, 1906)

Figure(s)

             

         

Syntype

  

lv - close up

 

Original name   Amussium manaricum Smith, 1906
Autoreference   Smith, 1906: 256.
Reference   Smith, E.A., 1906. Natural history notes from H.M. India Marine Survey Steamer "Investigator", Ser. 3 (10). On Mollusca from the Bay of Bengal and the Arabian Sea. - Annals and Magazine of Natural History (7) 18: 157-175, 245-264.
Type data   Syntypes: The Natural History Museum, London (BMNH 1906.10.12.91-98), National Museum & Gallery of Wales, Cardiff (NMW 1955.158.786), Zoological Survey of India, New Alipore, Calcutta (ZSI M3748/1). Type locality: Gulf of Manar, SW Sri Lanka, 06*31'N, 79*38.45'E, 733 m, alive, soft green mud, 19.04.1904 ("Investigator" stn 333); Andaman Islands, 11*26'30"N, 92*53'43"E, 691 m, alive, green mud, globigerina ooze, 20.xi.1903 ("Investigator" stn 322).
Description

  Shell up to ca. 26 mm high, fragile, semi-transparent, weakly inflated, left valve slightly more convex than right valve, somewhat higher than wide, inequivalve, nearly equilateral, auricles unequal in size and shape, colour whitish.

  Left valve with irregularly spaced, delicate radial lirae in early growth stage to the central part of the disc, after that developed into prominent commarginal lamellae to the ventral margin.

  Right valve with closely spaced commarginal sculpture. Internal ribs 10-12, with 2 auricular riblets and some interstitial rudimentary riblets. Byssal notch and ctenolium lacking.

Distribution

 

Gulf of Manar (TL), Andaman Islands (TL) Type locality not specified.

Habitat  Living bathyally on soft bottom assemblages.