Musculus niger J.E. Gray, 1824

Phylum:Mollusca Linnaeus, 1758
Class:Bivalvia Linnaeus, 1758
Order:Mytilida
Family:Mytilidae
Genus:Musculus

To size: To 50mm.

Shell Structure: Thin but not fragile. Equivalve: Equivalve. Equilateral: Strongly inequilateral beaks close to the anterior margin. Tumidity: Not inflated, umbos low. Outline: Modioliform; ligament margin long, not sloping steeply, angled to posterior dorsal margin; posterior rounded; ventral margin long, more or less straight but often depressed adjacent to non ribbed area; anterior narrow, rounded.

Sculpture: Radially ribbed except for smooth median area; 40-60 narrow, raised posterior riblets all minutely nodulose; interspaces very narrow; 12-15 anterior ribs, the anterior most often faint; Overall with comarginal lines and growth stops. Margin: Finely crenulate where radial ribs meet margin. Ligament: Deeply inset extending for most of the posterior dorsal margin. Hinge: Hinge plate narrow, posterior dysodont teeth obscure, otherwise smooth. Pallial Musculature: Mostly obscure. Colour: Yellow-brown to black-chestnut brown, thin, persistent.

Shelf depths, partly buried in soft but stable sediments.

Depth: 5 - 200 m.

Author: Manushin Igor E. / 29.09.2015
Last edit: Manushin Igor E. / 29.09.2015

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