The species namebrevicauda comes from Latin meaning "short tail".
Taxonomy
The species was originally described by William Frederick Purcell in 1903. In 2016, Zonstein described Pionothele capensis, which was later synonymized with Hermacha brevicauda by Ríos-Tamayo, Engelbrecht & Goloboff in 2021. This taxonomic change transferred the species from the genusPionothele back to Hermacha.