Polychalca punctatissima is a species of tortoise beetles belonging to the family Chrysomelidae.

Polychalca punctatissima can reach a length of about 13–17 millimetres (0.51–0.67 in).

These beetles feed on Black Sage (Cordia cylindrostachya, Boraginaceae).

This species can be found in Brazil and Argentina.

This Cassidinae article is a stub.