malleate

The Idaho Forestsnail (A. ptychophora) is very similar but the shell is slightly smaller, rarely malleated, and has more clearly developed axial riblets.

L’escargot-forestier de l’Idaho (A. ptychophora) est très similaire, mais sa coquille est légèrement plus petite, rarement sculptée de dépressions, et les côtes axiales sont plus marquées.