Mesocoelium monas (Rudolphi, 1819) Freitas, 1958

Hosts and locality records: Siphonops annulatus (locality not reported), Leptodactylus fuscus (= Leptodactylus sibilatrix) (RJ), Leptodactylus mystaceus (RJ), Leptodactylus mystacinus (RJ), Leptodactylus latrans (= Leptodactylus ocellatus) (locality not reported), Rhinella arenarum (= Bufo arenarum) (locality not reported), Rhinella crucifer (= Bufo crucifer) (locality not reported), Rhinella icterica (= Bufo ictericus) (RJ), Rhinella marina (= Bufo bimaculatus and Bufo marinus) (RJ), Rhinella schneideri (= Bufo paracnemis) (CO) and Scinax nasicus (CO) .

Distribution: Argentina and Brazil

Site of infection: small intestine

Stage: adult

Reference: Freitas (1967), Travassos et al. (1969), Fabio (1982), Rodrigues et al. (1990), Luque et al. (2005), Hamann et al. (2010) and Lunaschi and Drago (2010)