PROPEAMUSSIIDAE  

Parvamussium cristatellum

(Dautzenberg & Bavay, 1912)

Figure(s)

      

Lectotype (lv)

 

Original name   Pecten (Amussium) cristatum Bavay, 1905
Autoreference   Bavay, 1905: 187, pl. 17, figs 2a-c.
Reference   Bavay, A., 1905. EspŹces nouvelles du genre Pecten provenant de "L'Indian Museum de Calcutta". - Mémoires de la Société Zoologique de France 17: 186-190.
Type data

  Lectotype (lv: H 7.1 mm, L 7.2 mm), figured by Bavay (1905: pl. 17, fig. 2a), designated by Dijkstra & Kastoro (1997: 261) Zoological Survey of India, Calcutta, New Alipore (ZSI M3360/1). Type locality: India, Andaman Islands [no further data recorded].

Description

  Shell up to ca. 10 mm high, fragile, semi-transparent, weakly inflated, subcircular, left valve slightly more convex than right valve, inequivalve, nearly equilateral, anterior auricles somewhat larger than posterior, unequal in shape, internal ribs 7-10, usually 9, umbonal angle ca. 90 degrees, colour left valve creamy with milky-white dots, right valve whitish.

  Left valve with irregularly spaced prominent radial ribs with overrunning delicate commarginal lamellae, producing squamae on intersections.

  Right valve with closely spaced commarginal lamellose lirae. Byssal notch shallow, byssal fasciole narrow and ctenolium lacking.

Distribution

 

Andaman Islands (TL), Philippines, Indonesia, New Caledonia, Kermadec Islands, Wallis & Futuna Islands, Vanuatu Archipelago

Habitat  Living lower littorally and bathyally on soft bottom assemblages.
Remarks  Amussium cristatellum Dautzenberg & Bavay, 1912 is a replacement name (nom. nov.) for Pecten (Amussium) cristatum [sic] Bavay, 1905 (not of Pecten cristatus Bronn, 1828).