The sunny butterflies: new species of high montane pierids of the Catasticta poujadei group from the Peruvian Andes (Pieridae, Pierinae, Aporiina)

The Catasticta poujadei group, within the subgenus Hesperochoia Reissinger, is revised. Two new species, C. copernicus Pyrcz & Fahraeus sp. nov., and C. buszkoi Boyer & Pyrcz sp. nov. occurring near the timberline in Junin and Apurimac are described. Catasticta eximia Rober is reinstated as a species separate from C. poujadei, and a new subspecies, C. eximia tapuna ssp. nov., is described. The affinities of the species of the C. poujadei group are evaluated based on COI barcodes. Their distribution and habitats are described.