Type Locality : Holotype: female: Brazil, Bahia, Andaraí, Igatu, Gruna da Parede Vermelha, 12°52'42.8"S 41°18'59.5"W, 29 October 2010, M.E. Bichuette and J.E. Gallão (MNRJ 04357)
Etymology : The specific name is from the Latin adjective (masculine) hypogeus (underground), referring to the isolated site condition.
A new species of Tmesiphantes Simon, 1892, is described from sandstone/quartizitic caves of Chapada Diamantina, Bahia State, Brazil. This is the fifth species of the genus and the first record of a troglobitic mygalomorph in Brazil. A key is presented for all Tmesiphantes species.
Anais da Academia Brasileira de Ciências 85: 235-243