Type Locality : Peru, Carabaya, Puno, Ollachea, between Ollachea and Corani, 3859 m a.s.l
Etymology : The specific name is a patronym in honour of Fernando Pérez-Miles for his great contributions to the knowledge of systematics, biogeography, ecology and behaviour of Neotropical Theraphosidae.
New specimens of the genus Hapalotremus (Theraphosinae) are revised based on the examination of types and additional material collected in Argentina, Bolivia and Peru. A new generic diagnosis is proposed. New information and illustrations are provided for known species and seven new species were recognized and are newly described and illustrated. Hence, Hapalotremus comprises 10 valid species, distributed along the Andes and Yungas in western South America. All species are keyed and mapped. New taxonomic features are included in the descriptions and the detail of embolus keels morphology and positions are described for the first time for the genus. Information on species habitat is included. The highest altitude record for a Theraphosidae spider, living at 4524 m above sea level, is reported.