PECTINIDAE

Ciclopecten fluctuatus

(Bavay, 1905)

Figures

 

    

lv                    Holotype (seriously damaged)                    rv

Original name   Pecten (Chlamys) fluctuatus Bavay, 1905
Autoreference   Bavay, 1905: 188, pl. 17, figs 3a-b.
Reference   Bavay, A., 1905. EspŹces nouvelles du genre Pecten provenant de l' "Indian Museum de Calcutta". - Mémoires de la Société Zoologique de France 17 [1904] : 186-190.
Type data   Holotype (pr: H 10 mm, L 9 mm). Zoological Survey of India, New Alipore, Calcutta (ZSI M3359/1). Type locality: Off Andaman Islands, ?alive [further data not reported].
Description

  Shell up to ca. 10 mm high, thin, subcircular, slightly higher than long, left valve convex, somewhat undulated, slightly equivalve and equilateral, anterior auricle larger than posterior, umbonal angle ca. 90-105 degrees, colour whitish or creamy, semi-transparent to opaque.

  Both valves undulating and complexly sculptured with delicate, regularly spaced, scaly radial riblets and microscopic diverging striae.

  Anterior auricle of right valve distinctly demarcated from disc flank with 4 weak radial scaly riblets, posterior continuous with disc. Byssal notch relatively deep, byssal fasciole rather broad. Inactive and active (functional) ctenolium present (3 teeth).

Distribution

 

Andaman Islands (TL), Indonesia, Loyalty Islands, Vanuatu Archipelago

Habitat   Living bathyally, probably byssally attached to substrates on soft bottom assemblages.