Biodiversity of anuran endoparasites from a transitional area between the Atlantic Forest and Cerrado biomes in Brazil: new records and remarks Author Aguiar, Aline Laboratório de Herpetologia, Departamento de Biodiversidade, Instituto de Biociências, UNESP Rio Claro, Avenida 24 A, 1515 - Jardim Vila Bela, CEP 13506 - 900, Rio Claro, São Paulo, Brazil Author Morais, Drausio Honorio Universidade Federal de Uberlândia - UFU, Instituto de Ciências Agrárias, LMG- 746, Km 1, Monte Carmelo, 38500 - 000, MG, Brazil Author Firmino Silva, Lidiane A. Departamento de Parasitologia, Instituto de Biociências de Botucatu, Universidade Estadual Paulista - UNESP Author Anjos, Luciano Alves Dos Departamento de Biologia e Zootecnia, Faculdade de Engenharia de Ilha Solteira, Universidade Estadual Paulista - UNESP, Passeio Monção, 226, CEP 15385 - 000, Ilha Solteira, São Paulo, Brazil Author Foster, Ottilie Carolina Departamento de Parasitologia, Instituto de Biociências de Botucatu, Universidade Estadual Paulista - UNESP Author Silva, Reinaldo José Da Departamento de Parasitologia, Instituto de Biociências de Botucatu, Universidade Estadual Paulista - UNESP text Zootaxa 2021 2021-03-18 4948 1 1 41 journal article 7577 10.11646/zootaxa.4948.1.1 7af2fc34-63ae-40d2-95a6-4bed18653e7a 1175-5326 4616068 79CCDC5F-2F94-4398-B3DD-8DAC05669E9C Oswaldocruzia mazzai Travassos, 1935 Hosts (prevalence; range) : R. diptycha (1/21; 116). Site of infection : small intestine. Stage : adult. Type host and type locality : Rhinella sp. (= Bufo sp.), Argentina . Comments : the main differences among the species of Oswaldocruzia can be observed in spicules morphology and rays of the male caudal bursa. There are five groups according to spicule morphology and biogeographic distribution (Orient-Ethiopian; Neo-Ethiopian; Holarctic; Neotropical-continental; Neotropical-Caribbean) ( Ben Slimane et al . 1996 ). The relative disposition and origin of rays 6 and 8 in caudal bursa are organized in Type I, Type II and Type III (see Ben Slimane et al . 1996 ). Oswaldocruzia mazzai presents characters such as vesicle cephalic in two regions (the anterior is wider than posterior), spicules of the Neotropical-continental group (idiomorphic spicules with the bifurcation of fork in the distal third of spicule), there are around ten branches in spicules blade, caudal bursa type II (the ray 8 is independent of ray 6 in origin but with an overlap in the middle of its extension), and absence of lateral flaps in anterior portion of body. Moreover, our specimens also presented excretory pore in a distal third of esophagus, spike in the caudal end of female, and vulva in the middle of body. Rhinella diptycha is a new host for O. mazzai .