Full text can be accessed at http://www.ncbi.nlm.nih.gov/pubmed/26046178Pachytrechodes brevis Belousov & Nyundo, new species, is described from the Udzungwa Mountains, Tanzania. This species is the first member of the genus found outside of the Uluguru Mountains. A key to the four currently known species of Pachytrechodes is included, based on Uéno's (1987) key. The distribution of all species is mapped.