Porthecla dinus is a butterfly in the family Lycaenidae.

It is found in fragmented montane habitats at altitudes between 600 and 1,800 meters in south-eastern Brazil.

The length of the forewings is 16.7 mm for males and 15.6 mm for females.

[2] Adults are on wing from September to April.

This Eumaeini-related article is a stub.