Prophysaon foliolatum

Prophysaon foliolatum, or the yellow-bordered taildropper, is a slug in the genus Prophysaon, native to North America, ranging from Alaska to Oregon.

Appearance

This species is an overall dull brown colored slug, with a yellow line bordering its mantle. The similar species P. andersonii does not have this yellow border.

Forms

There is a Canadian color form that is almost black, but it can still be distinguished by the bright yellow border the mantle.

Albino individuals have been spotted on the Olympic coast.

References

• Gould, A.A. (1851). The terrestrial air-breathing mollusks of the United States, and the adjacent territories of North America. Vol. 2. Little, Brown and Company, Boston. 1-366.