Arthurdendyus albidus is a species of land planarian belonging to the tribe Caenoplanini.

[1] It is found in Scotland, though it is thought to have originated in New Zealand before being introduced like other members of its genus.

The specific epithet of albidus derives from the Latin word for "whitish", in reference to the species' main color.

[2] Arthurdendyus albidus is a creamy white color.

Its body is elongate and mostly flat, though the backside is slightly raised.