Pseudamussium peslutrae (Linnaeus, 1771),
|Phylum:||Mollusca Linnaeus, 1758|
|Class:||Bivalvia Linnaeus, 1758|
|Order:||Pectinida Gray, 1854|
|Family:||Pectinidae Rafinesque, 1815|
|Genus:||Pseudamussium Mörch, 1853|
|Synonyms:||Pseudamussium septemradiatum (O. F. Müller, 1776); Ostrea peslutrae Linnaeus, 1771|
To size: To 50mm.
Shell Structure: Solid. Equivalve: Inequivalve, RV slightly more convex than LV. Equilateral: Inequilateral. Outline: Subcircular, (umbonal angle about 95°), ears almost equal in size. Contour: RV with a weak byssal notch, ctenolium weakly developed.
Sculpture: Typically with 5-7 broad radial undulations but may number up to 10, those on right lower valve more broad. Initially with weakly spined radial riblets, these fading in typical shells; some with persistent radial riblets giving a weakly crenulated margin. Colour: Upper (LV) reddish-brown often with paler blotches or zigzag markings. Lower (RV) paler, often dirty white.
Free living on muddy mixed sediments at shelf to upper slope depths.
Depth: 10 - 500 m.