"I think that is the anal papilla, the black conical protrusion on the far left of the slug. The tubercles are arranged in angular groups, and in a central + lateral series, characteristic of pustulosa."
Comment from Nathalie Yonow
I think that is the anal papilla, the black conical protrusion on the far left of the slug. The tubercles are arranged in angular groups, and in a central + lateral series, characteristic of pustulosa.