A redescription of Glypthelmins linguatula (Rudolphi, 1819) Travassos, 1924 and G. vesicalis (Ruiz and Leao, 1942) Yamaguti, 1958 with a key to the valid species. Riv. Parassit., 31 1970: 261-274. 247 [Zoological Record Volume 107]