Limatulum oklahomense Macy, 1932 in Myotis nigricans [Chiroptera] from Argentina and a redescription of L.umbilicatum [Velez et Thatcher, 1990] comb.nov. [Digenea, Lecithodendriidae]

In this paper, Limatulum oklahomense Macy, 1932 (Lecithodendriidae) is described from specimens found in the stomach of Myotis nigricans (Schinz) (Chiroptera) from the Formosa Province, Argentina and L. costarricensis Caballero, 1964 from Panama which is synonymized with L. oklahomense. Sturniratrema umbilicata Vélez et Thatcher, 1990 is redescribed on the basis of two paratype specimens and transferred to Limatulu Travassos, 1921. The finding of L. oklahomense represents the first record of the genus for Argentina, thus enlarging the geographical distribution of the species to the Neotropical Region.