title: Some remarks on the distribution and dispersion of Coccidia from icterid birds in South America: Isospora guaxi n. sp. and Isospora bellicosa Upton, Stamper & Whitaker, 1995 (Apicomplexa: Eimeriidae) from the red-rumped cacique Cacicus haemorrhous (L.) (Passeriformes: Icteridae) in southeastern Brazil.
abstract: A new species of coccidian, Isospora guaxi n. sp., and Isospora bellicosa Upton, Stamper & Whitaker, 1995 (Protozoa: Apicomplexa: Eimeriidae) are recorded from red-rumped caciques Cacicus haemorrhous (L.) in the Parque Nacional do Itatiaia, Brazil. Isospora guaxi n. sp. has sub-spheroidal oöcysts, measuring on average 30.9 × 29.0 μm, with smooth, bi-layered wall c.1.9 μm thick. Micropyle and oöcyst residuum are absent, but a polar granule is present. Sporocysts are ellipsoidal, measuring on average 19.3 × 13.8 μm. Stieda body is knob-like and sub-Stieda body is prominent and compartmentalized. Sporocyst residuum is composed of scattered granules. Sporozoites are vermiform, with one refractile body and a nucleus. Isospora bellicosa has sub-spheroidal to ovoidal oöcysts, measuring on average 27.1 × 25.0 μm, with smooth, bi-layered wall c.1.5 μm thick. Micropyle and oöcyst residuum are absent, but one or two polar granules are present. Sporocysts are ellipsoidal, measuring on average 18.1 × 10.9 μm. Stieda body is knob-like and sub-Stieda body is rounded to rectangular. Sporocyst residuum is composed of a cluster of compact or diffuse granules. Sporozoites are vermiform, with one refractile body and a nucleus. Isospora bellicosa was originally described from the Peruvian meadowlark Sturnella bellicosa deFilippi, a trans-Andean icterid which is allopatric with the cis-Andean C. haemorrhous. Therefore, in conclusion, this current study reveals the dispersion of coccidia from Icteridae across the Andes Mountains, besides describing the sixth isosporoid coccidium infecting an icterid bird.
authors.affiliation: Programa de Pós-Graduação em Ciências Veterinárias, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica, Rio de Janeiro, 23897-000, Brazil.
authors.forename: Lidiane Maria
authors.initials: LM
authors.lastname: da Silva
authors.affiliation: Programa de Pós-Graduação em Ciências Veterinárias, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica, Rio de Janeiro, 23897-000, Brazil.
authors.forename: Mariana Borges
authors.initials: MB
authors.lastname: Rodrigues
authors.affiliation: Programa de Pós-Graduação em Ciências Veterinárias, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica, Rio de Janeiro, 23897-000, Brazil.
authors.forename: Irlane Faria
authors.initials: IF
authors.lastname: de Pinho
authors.affiliation: Programa de Pós-graduação em Ciência, Tecnologia e Inovação em Agropecuária, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica, Rio de Janeiro, 23897-000, Brazil.
authors.forename: Bruno
authors.initials: B
authors.lastname: do Bomfim Lopes
authors.affiliation: Departamento de Parasitologia Animal, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica, Rio de Janeiro, 23897-000, Brazil.
authors.forename: Hermes Ribeiro
authors.initials: HR
authors.lastname: Luz
authors.affiliation: Departamento de Biologia Animal, Instituto de Ciências Biológicas e da Saúde, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica, Rio de Janeiro, 23897-000, Brazil.
authors.forename: Ildemar
authors.initials: I
authors.lastname: Ferreira
authors.affiliation: Departamento de Parasitologia Animal, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica, Rio de Janeiro, 23897-000, Brazil.
authors.forename: Carlos Wilson Gomes
authors.initials: CW
authors.lastname: Lopes
authors.affiliation: Departamento de Biologia Animal, Instituto de Ciências Biológicas e da Saúde, Universidade Federal Rural do Rio de Janeiro, BR-465 km 7, Seropédica, Rio de Janeiro, 23897-000, Brazil. bertobp@ufrrj.br.
authors.forename: Bruno Pereira
authors.initials: BP
authors.lastname: Berto
mesh_terms: D000818:Animals; D001938:Brazil; D003044:Coccidia / Q000502:physiology*; D003710:Demography; D007549:Isospora / Q000145:classification* / Q000166:cytology / Q000502:physiology*; D033661:Oocysts / Q000166:cytology; D046109:Passeriformes / Q000469:parasitology*; D013045:Species Specificity; D034101:Sporozoites / Q000166:cytology