PROPEAMUSSIIDAE  

Propeamussium dalli

(Smith, 1885)

Figure(s)

       

Syntype

    

  lv                    inside                  rv

 

Original name   Amussium dalli Smith, 1885
Autoreference   Smith, 1885: 308, pl. 22, figs 7-7c.
Reference   Smith, E.A., 1885. Report on the Lamellibranchiata collected by H.M.S. "Challenger" during the years 1873-1876. - Challenger Reports, Zoology, 13 (35): 1-341.
Type data   Figured syntype (pr: H 52 mm, L 48 mm, D 8 mm) The Natural History Museum, London (BMNH 1887.2.9.3304). Type locality: off Bermuda, 32*21'30"N, 64*35'55"W, 796 m, coral mud, 04.iv.1873 ("Challenger" stn 33).
Description

  Shell up to ca. 90 mm high, fragile, semi-transparent to opaque, left valve weakly inflated, right valve nearly flat, elongate, almost equivalve and equilateral, auricles nearly equal in size and shape, colour whitish or creamy.

  Both valves with very closely spaced commarginal sculpture. Internal ribs gradually developed with 9 ribs, on right valve broader than on left valve. Byssal notch and ctenolium lacking.

Distribution

 

Florida, Gulf of Mexico, Caribbean Sea, Bermuda (TL), West Indies

Habitat  Living bathyally on soft muddy bottom assemblages.