PROPEAMUSSIIDAE  

Similipecten nanus

(Verrill & Bush in Verrill, 1897)

Figure(s)

 

Syntype

Original name   Cyclopecten nanus Verrill & Bush in Verrill, 1897
Autoreference   Verril & Bush in Verrill, 1897: 85, pl. 16, figs 12, 12a-c [as parvus]
Reference   Verrill, A.E., 1897. A study of the family Pectinidae with a revision of the genera and subgenera. - Transactions of the Connecticut Academy of Arts and Science 10: 41-95.
Type data   Figured syntype (H 6 mm, L 7 mm) . National Museum of Natural History, Washington DC (USNM 107789).Type locality: W Atlantic, off eastern coast of United States, opposite Chesapeake Bay and Cape Hatteras, 43-132 m, alive and dead, 1884 ("Albatross" ). See also Verrill & Bush (1898: 838).
Description

  Shell up to ca. 9 mm high, fragile, transparent to opaque, right valve slightly more convex than left valve, subcircular, inequivalve, nearly equilateral, auricles equal in size, rather broad, unequal in shape, posterior auricles smooth or weakly sculptured and continuous with disc, anterior with commarginal lamellae and demarcated and somewhat curved marginally, internal ribs lacking, umbonal angle ca. 95 degrees, colour whitish or yellowish with paler spots and blotches or irregular patches.

  Left valve smooth or with commarginal and radial microsculpture and commarginal growthlines near ventral margin.

  Right valve smooth, sometimes with commarginal growthlines. Byssal notch shallow, byssal fasciole narrow, ctenolium lacking.

Distribution

 

North Carolina (TL), Gulf of Mexico, Caribbean Sea, West Indies, Surinam, Guyana, Brazil

Habitat Living lower littorally and bathyally on rubble, sandy bottoms.