These slugs are notable for being able to self-amputate (autotomy) a portion of their tail.[1][2]
Description
Adults of this slug species are about 50 mm when active, but can exceed 60 mm in length. The color of the body is a grayish or reddish brown, or can be yellowish. The dorsum is furrowed with a reticulated pattern like a mesh of diamond shapes. The mantle of the slug has two dark lateral bands. The mucus is yellow or orange.[3]
Distribution
This species of slug occurs in North America, including California, Oregon and part of Montana.
^Hand, C., and W.M. Ingram. 1950. Natural history observations on Prophysaon andersoni (J.G. Cooper) with special reference to amputation. Bulletin of the Southern California Academy of Sciences 49: 15-28.
^mtgov, Montana's Official State Website, Montana Field Guides, Reticulate Taildropper - Prophysaon andersoni,