Falcaustra congoensis n. sp. (Ascaridida, Kathlaniidae) from the large intestine of Amietia nutti (Boulenger, 1896) (Anura, Pyxicephalidae) is described and illustrated. Falcaustra congoensis represents the 16th Afrotropical species assigned to the genus and is distinguished from other Aftrotropical species by the distribution pattern of the caudal papillae (6 precloacal, 2 adcloacal, 14 postcloacal, and 1 median), length of spicules (0.33–0.38 mm), and presence of 1 pseudosucker. Amietia nutti was found to harbor 1 additional species of Nematoda, adults of Amphibiophilus chabaudi. Amietia nutti represents a new host record for each of these helminth species.