title: Isospora pitiguari n. sp. (Apicomplexa: Eimeriidae) from the rufous-browed peppershrike (Aves: Passeriformes: Vireonidae) Cyclarhis gujanensis Gmelin, 1789.
abstract: In the current study, a new coccidian species (Protozoa: Apicomplexa: Eimeriidae), collected from the rufous-browed peppershrike Cyclarhis gujanensis Gmelin, 1789, is reported from Brazil. Isospora pitiguari n. sp. has oocysts, which are spherical to sub-spherical, 26.8 × 25.7 μm, with smooth, bilayered wall ~1.5 μm thick. Micropyle, oocyst residuum, and polar granule are absent. Sporocysts are rounded to slightly ovoidal, 14.4 × 11.6 µm. Stieda body flattened and substieda body prominent and rounded. Sporocyst residuum is composed of granules of different sizes. Sporozoites are vermiform with one refractile body and a nucleus. This is the first description of an isosporoid coccidium infecting a New World vireo.
authors.affiliation: Programa de Pós-graduação em Ciência, Tecnologia e Inovação em Agropecuária, Universidade Federal Rural do Rio de Janeiro (UFRRJ), BR-465 km 7, 23897-970 Seropédica, RJ, Brazil; Email: unknown.
authors.forename: Bruno do Bomfim
authors.initials: Bdo B
authors.lastname: Lopes
authors.affiliation: Departamento de Biologia Animal, Instituto de Biologia, UFRRJ, BR-465 km 7, 23897-970 Seropédica, RJ, Brazil; Email: bertobp@ufrrj.br.
authors.forename: Bruno Pereira
authors.initials: BP
authors.lastname: Berto
authors.affiliation: Curso de Pós-Graduação em Ciências Veterinárias, UFRRJ, BR-465 km 7, 23897-970 Seropédica, RJ, Brazil; Email: unknown.
authors.forename: Hermes Ribeiro
authors.initials: HR
authors.lastname: Luz
authors.affiliation: Curso de Pós-Graduação em Ciências Veterinárias, UFRRJ, BR-465 km 7, 23897-970 Seropédica, RJ, Brazil; Email: unknown.
authors.forename: Gideão da Silva
authors.initials: Gda S
authors.lastname: Galvão
authors.affiliation: Departamento de Biologia Animal, Instituto de Biologia, UFRRJ, BR-465 km 7, 23897-970 Seropédica, RJ, Brazil; Email: unknown.
authors.forename: Ildemar
authors.initials: I
authors.lastname: Ferreira
authors.affiliation: Departamento de Parasitologia Animal, Instituto de Veterinária, UFRRJ, BR-465 km 7, 23897-970 Seropédica, RJ, Brazil; Email: lopescwg@ufrrj.br.
authors.forename: Carlos Wilson Gomes
authors.initials: CW
authors.lastname: Lopes
mesh_terms: D000818:Animals; D021743:Eimeriidae / Q000145:classification* / Q000302:isolation & purification*; D008297:Male; D033661:Oocysts / Q000166:cytology; D046109:Passeriformes / Q000469:parasitology*; D013045:Species Specificity