Travassosnema gen. n. with the description of T. travassosi sp. n. (Dracunculoidea, Guyanemidae) parasite of Acestrorhynchus lacustris Reinhardt, 1874 (Characidae) from Tres Marias Reservoir, MG, Brazil. Memorias do Instituto Oswaldo Cruz, 86(4), oct-dec 1992: 437-439. 437 [Zoological Record Volume 130]