Semiotus distinctus is a species of beetle belonging to the family Elateridae from South America (Argentina, Brazil, Paraguay).
Semiotus distinctus can reach a length of . Basic colour of the body varies from reddish-yellow to ferrugineous. Pronotum shows a single longitudinal median dark streak and deep scattered punctures, while elytra have two stripes and poorly impressed striae.
This species can be found in southern Brazil, Paraguay and Argentina.