A new diagnosis of the Trichouropodellidae fam. nov. and the genus Trichouropodella Hirschmann & Zirngiebl-Nicol are given with the description of T. nemenyiisp. nov. discovered in a bamboo bush in Paraguay. The new species differs from the congeners in the shape of setae close to posterior margin of female genital shield and in the shape of setae posterior to the preanal line. All species of Trichouropodella are listed together with a new key to the known species. A comparative table for the three closely related families Nenteriidae, Trematuridae and Trichouropodellidae is presented.