Los nematodos cosmocercidos son parásitos comunes de anfibios y reptiles. Aunque es una familia bien conocida, falta conocimiento sobre la diversidad de sus hospederos. En este documento, ampliamos el conocimiento de la fauna parasitaria de anuros de la familia Hylodidae y la distribución geográfica de tres especies de nematodos cosmocercidos (Cosmocerca brasiliensis Travassos, 1925, Cosmocercoides sauria Ávila, Strüssmann & Silva, 2010 y cosmocercid) encontrados en dos ranas torrentes macho Hylodes heyeri Haddad Pombal & Bastos, 1996. Nuestro reporte incluye nuevos datos sobre la distribución geográfica y la morfología de los parásitos cosmocercidos y aclara aún más las interacciones parasitarias de los anfibios neotropicales.

Parasitological studies are important to understand the host-parasite interaction, providing information on the coevolution, biogeography, morphology, and diet of the species. The present study describes the endoparasite fauna of the lizard Phyllopezus pollicaris (Spix, 1825) in the Palmares National Forest, Piauí State, Brazil, a tropical forest covered by transitional vegetation between the Caatinga and Cerrado biomes. Furthermore, we investigated the influence of lizards’ size and sex on endoparasite infection patterns. We analyzed 23 individuals of P. pollicaris, of which 18 were infected by at least one helminth, belonging to the Nematoda phylum: Spauligodon oxkutzcabiensis (Chitwood, 1938), Strongyloides sp., and Parapharyngodon sp. Overall, S. oxkutzcabiensis showed the highest prevalence (73.9%), mean infection intensity (8.64 ± 12.7), and mean abundance (6.39 ± 11.5). We ob...

The knowledge of parasitic fauna in wild animals is essential for understanding the ecological conditions that determine the occurrence and prevalence of parasites in their hosts. With the exception of records of one Pentastomida (Cephalobaena tetrapoda Heymons, 1922) and two Nematoda (Physaloptera sp. And Aspiculuris sp.), detailed information about the helminth fauna associated with the jararaca Bothrops erythromelas Amaral, 1923 is lacking. This species has a wide distribution in the Caatinga, with records in marginal areas of the Cerrado and Atlantic Forest. Here, we describe the patterns of richness, abundance, and prevalence of helminths in B. erythromelas, a venomous snake from northeastern Brazil. The parasitized snakes were collected from six Brazilian states in the Northeast region: Bahia, Ceará, Paraíba, Pernambuco, Piauí, and Rio Grande do Norte. We examined the gastrointe...