[Does the comparator method has a future in diagnosing large bivalves (Bivalvia: Unionida)?].
It is shown that the contours of the frontal sections of valves in shells of different size of the same species run through different parts of the valve. A new modification of the comparator method is proposed, which allows studying the shape of the maximum convex contour of the cross-section of the shell.
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Bogatov
D060105:Animal Shells / Q000033:anatomy & histology*; D000818:Animals; D049872:Bivalvia / Q000033:anatomy & histology* / Q000145:classification; D010641:Phenotype