PROPEAMUSSIIDAE  

Catillopecten eucymatus

(Dall, 1898)

Figure(s)

 

   

lv                                                             rv

(provisionally)

Original name   Hyalopecten fragilis Verrill, 1897
Autoreference   Dall, 1898: 754.
Reference   Dall, W.H., 1898. Contributions to the Tertiary fauna of Florida [...], Part 4. I. Prionodesmacea, II. Teleodesmacea. - Transactions of the Wagner Free Institute of Science of Philadelphia 3 (4): i-viii, 571-947.
Type data   Syntypes USNM 35566 (registered as Pecten eucymatus Dall, 1898). Type locality: Not specified. Western Atlantic, "Albatross" station 2115, North Carolina, off Cape Hatteras, 35*49'30"N, 74*34'45"W, 1542 m; Stn 2215, 39*49'15"N, 70*31'45"W, 1057 m; Stn 2221, 39*05'30"N, 70*44'30"W, 2789 m; Stn 2234, 39*09'00"N, 72*03'15"W, 1492 m; Stn 2710, 40*06'00"N, 68*01'30"W, 1800 m.
Description

  Shell up to ca. 10 mm high, very fragile, transparent, weakly inflated, left valve weakly convex convex, right valve flat, nearly circular, inequivalve, nearly equilateral, auricles nearly equal in size, but unequal in shape, colour whitish, internal ribs lacking, umbonal angle ca. 110 degrees.

  Both valves weakly undulated on central part of disc, smooth near ventral margin. Macro- and microsculpture lacking. Auricles with delicate commarginal lamellae, posterior auricle of right valve smooth. Byssal notch deep, byssal fasciole and ctenolium lacking.

Distribution

 

Western and eastern Atlantic

Habitat Living lower bathyally and abyssally on soft bottom assemblages.
Remarks

  Pecten eucymatus Dall, 1898 is based on Pecten fragilis Verrill, 1897 (not Pecten fragilis Jeffreys, 1876).