ID Keys | Pictorial key

Depth range

(including shells found on beaches)

Outline Shape

Not sure


Shell outline ratio

Valve Symmetry: equivalve or inequivalve

(valves the same dimensions)

Valve Lateral form: equilateral or inequilateral


Visibility of the Ligament

Shell sculpture

Primary Sculpture

Secondary Sculpture

Internal Features - Teeth

(simple projections in a row
along the dorsal margins)

Internal Features - Other

Pallial sinus

(Pallial line and sinus indistinct)

(Pallial line visible and complete)

Internal Butress
(Large shelf-like projection posterior to the hinge)

Internal Margin

Matched Species
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