Key Identification Features
- For slugs, it is often difficult to establish reliable criteria to identify species using either external or internal features.
- Coloration can be quite variable, and relatively plastic anatomy makes it hard to define clear diagnostic anatomical features.
- To distinguish this species from Arion distinctus, see the article on Arion distinctus.
- It has two distinct color morphs: brown and black.
For instant identification in the field, use the iNature app — AI-powered, works offline.
