Geoplana paranapiacaba is a species of land planarian belonging to the subfamily Geoplaninae.

[1] It is known from specimens found in the Paranapiacaba district of Santo André, Brazil.

The dorsal side has an orange-ochre stripe running down the middle, bounded on each side by a black line; the line is bordered by a broader white line, which is in turn bordered by a black stripe, which is then bordered by a grey stripe with white mottling.

A marginal thin black line borders the grey stripe.

[2] Aside from its coloration, it is distinguished from other members of Geoplana by the diameter of the muscular cylinder surrounding the ejaculatory duct being 0.5 times that of the duct, and a female-to-male atrium length ratio of 3.5–4.