mˈoʊst spˈiːsiːz ɑːɹ fɹʌm ɹˈɪvɚz ɪn æŋɡˈoʊlə ænd næmˈɪbiə, ɔːɹ ðə kˈɑːŋɡoʊ ɹˈɪvɚ bˈeɪsən ɪn sˈɛntɹəl ˈæfɹɪkə, bˌʌt tˈiː. wˈɪŋɡɐtˌɪaɪ ɪz fɹʌmðə nˈaɪl sˈɪstəm.
Most species are from rivers in Angola and Namibia, or the Congo River Basin in Central Africa, but T. wingatii is from the Nile system.