Catadiscus propinquus Freitas & Dobin Jr., 1956

Hosts (prevalence; range): L. chaquensis (2/143; 2), L. fuscus (3/50; 1–2), L. podicipinus (29/225; 1–10), P. azureus (3/47; 2–6), P. platensis (3/38; 5–14) and P. mystacalis (3/59; 1).

Site of infection: small and large intestines.

Stage: adult.

Type host and type locality: Lithobates palmipes (Spix) (= Rana palmipes), Recife (Tejipió), Pernambuco State, Brazil.

Comments: Catadiscus propinquus and C. marinholutzi are similar by body shape, rounded cirrus sac, apparently similar size of testis, size of ventral sucker, and distribution of vitelline follicles which are spread and across transversally the body. However, the features of our specimens resemble C. propinquus which can be distinguished from its congeneric by the analysis of characters such as large oral sucker, pharynx length, irregular shape of testis, globular cirrus sac, small ovary, size and amount of eggs (see Freitas & Dobin 1956). Catadiscus propinquus is very common in the intestines of anurans from Brazil and Argentina (Campi„o et al. 2014; Graça et al. 2017), but L. fuscus, P. azureus, P. platensis, and P. mystacalis are new records.