PROPEAMUSSIIDAE  

Catillopecten graui

(Knudsen, 1970)

Figure(s)

 

                                                                

Holotype

 

Original name   Cyclopecten (Hyalopecten) graui Knudsen, 1970
Autoreference   Knudsen, 1970: 97, text-figs 59, 60, pl. 13, fig. 1.
Reference   Knudsen, J., 1970. The systematics and biology of abyssal and hadal Bivalvia. Galathea Report 11. Copenhagen. 241 pp., 20 pls.
Type data   Holotype (pr: H 17.0 mm, L 18.0 mm) Zoological Museum, University of Copenhagen, Copenhagen (ZMUC, not yet registered). Type locality: E Pacific, Gulf of Panama, 05*49'N, 78*52'W, 3270-3670 m, alive, clay bottom, 13.v.1952 ("Galathea" stn 726).
Description

  Shell up to ca. 17 mm high, very fragile, semi-transparent, very weakly inflated, left valve weakly convex, right valve flat, circular, inequivalve, equilateral, auricles nearly equal in size, unequal in shape, colour whitish, internal ribs lacking, umbonal angle ca. 110 degrees.

  Both valves weakly commarginally undulated, left valve with very closely spaced, fine commarginal lamellae, right valve smooth, near margin delicate commarginal lamellae. Auricles continuous with disc, except anterior auricle of right valve, demarcated from the disc, with delicate commarginal lamellae. Byssal notch deep, byssal fasciole and ctenolium lacking.

Distribution

 

Eastern Pacific, Gulf of Panama (TL)

Habitat Living abyssally on soft bottom assemblages.