Neotropical Monogenoidea. 27. Two new species of Telethecium gen. n. from the nasal cavities of central Amazonian fishes and a redescription of Kritskyia moraveci Kohn, 1990 (Dactylogyridae, Ancyrocephalinae). Journal of the Helminthological Society of Washington, 63(1), January 1996: 35-41. 35 [Zoological Record Volume 132]