Habitat: it is a species with a remarkable bathymetric distribution. It lives from a few metres depth up to more than 200 m depth, on sandy-gravelly bottoms.
Distribution: it is collected in several localities of the Mediterranean but never common.
Notes: shell brittle, equivalve, inequilateral.Valves compressed, oval in outline, umbo almost central. Surface smooth and bright, iri-descent, sometimes with one light incised dot, mainly in the umbonal zone. Ventral margin almost straight, while laterally and on the back it is roundish. Internal surface white in colour, margins smooth. Hinge made by one cardinal tooth in both valves and two lateral teeth: one of them anterior and one of them posterior. Dirty white in colour. Periostracum fine and yellowish. Muscle scars quite clear externally too. Juvenile specimens (diametre=l mm) are more roundish in outline. A similar species is Lepton squamosum that however, besides reaching quite bigger sizes, is subquadrangular in outline and its surface is finely sculptured.
There were described some varieties as: laevis, lineolata, pisidialis, Jeffreys, 1864, of no taxonomic value. The adult specimens average measures are around 2-2.5 mm in width.