ˈɛl. nˈɛmɐtˌɑːptɚɹˌɪks ɪz dˈɪstɹɪbjˌuːɾᵻd ɪnðɪ ɪmbˈɑːɹɹɪˌɛɹ kɹˈiːk ænd bˈeɪsən ʌvðɪ ɛstɹˈɛlɚ ɹˈɪvɚ sˈɪstəm ʌv pˌaɪəbɪtˈɑː ɪnðə ɹˈiːoʊ də ʒɐnˈɛɹoʊ stˈeɪt, ænd pˌɪsɪŋɡjuːˈɑːbə ɪnðə sˈaʊ pˈɔːloʊ stˈeɪt.
L. nematopteryx is distributed in the Imbariê Creek and basin of the Estrela River system of Piabetá in the Rio de Janeiro State, and Picinguaba in the São Paulo State.