Physalopterinae gen. sp.

Hosts (prevalence; range): B. raniceps (4/79; 1–15), P. azureus (1/47; 3), S. cf. similis (1/2; 1), L. fuscus (1/50; 3), L. mystacinus (1/8; 4), and L. podicipinus (3/225; 1–3).

Site of infection: stomach.

Stage: larva.

Type host and type locality: not informed.

Comments: adult nematodes of Physalopterinae are very common in the stomach of reptiles, birds, and mam-

mals. Larvae are found free in the stomach of amphibians which act as intermediate or paratenic hosts (Anderson 2000). Our specimens presented a small oral cavity and anterior extremity with cuticle folded above the lips resulting in a cephalic collar which are characters of Physalopterinae (Vicente et al. 1991; Kelehear & Jones 2010). The two triangular lateral lips can present a variable number of teeth and papillae that are important to identify these nematodes (Vicente et al. 1991; Kelehear & Jones 2010). We presume these larvae can be a species of Physaloptera, but we were unable to distinguish morphologically because there are other species closely related in the Physalopterinae . All these hosts constitute new data except B. raniceps which has already been reported as host for Physaloptera sp. by Graça et al. (2017) and Campi„ o et al. (2016). Recently, Silva et al. (2018) and Oliveira et al. (2019) recorded Physalopera sp. for species of Leptodactylidae and Silva et al. (2019) in species of Odontophynidae in northeastern Brazil.