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MacGillivray, 1843

Description (shell):
Shell with short, fat spire, with five whorls and the protoconch; shiny and smooth. Whorls rounded, curving into sutures basally, with a few faint growth lines. Aperture oval, almost as long as last whorl, with flattened outer lip. Columellar tooth weakly developed; umbilicus small but distinct.

Size:
Up to 4.4 mm.

Colour:
White.

Habitat:
Hosts are many prosobranchs and several lamellibranchs, especially Mytilus edulis .

Distribution:
Common in the North Sea (Distr. O. scalaris).

Odostomia scalaris