Colostethus parcus Rivero, 1991 Hyloxalus parcus (Gualaceo rocket frog) is a species of frogs in the family Dendrobatidae.

It is endemic to Ecuador where it was first known from its type locality in the Zamora-Santiago Province at an elevation of 1,981 m (6,499 ft) asl.

Scientists infer that it breeds through larval development, like its congeners.

The International Union for Conservation of Nature classifies Hyloxalus parcus as Data Deficient.

Its known range overlaps with one protected park: Área Ecológica de Conservacíon Siete Iglesias.