The taxonomy of Schizomida has been the most active research topic for this group, however, only recently the male genitalia was properly studied, and are currently known only for the Brazilian species Surazomus algodoal Ruiz & Valente. In this study, we describe Calima dearmasi sp. nov., the first species of the genus for which male genital structures are illustrated and analyzed. Comparative analyses are conducted with the genitalia of two undescribed species, one from Colombiazomus Armas & Delgado-Santa and another from Piaroa Villarreal, Giupponi & Tourinho. This study expands the morphological knowledge of male genitalia in Schizomida, and finally, we discuss the potential use of these characters in Schizomid taxonomy.