Amphiporus superbus (Stimpson, 1854)

Length up to 3 cm, width up to 3 mm. Dorsal surface dark reddish brown while margins and ventral side are lighter. Head typically demarkated by furrows and a transverse white band just in front of the posterior pair of furrows meating dorsally. The anterior pair do not meet. A characteristic swollen median ridge is running from nose to neck.