title: New species of Eimeria Schneider, 1875 and Isospora Schneider, 1881 (Apicomplexa: Eimeriidae) from the short-crested flycatcher Myiarchus ferox (Gmelin) (Passeriformes: Tyrannidae) in South America.
abstract: In the current study, two new coccidian species (Protozoa: Apicomplexa: Eimeriidae) obtained from short-crested flycatcher Myiarchus ferox (Gmelin) are reported from Brazil. Isospora feroxis n. sp. has oöcysts which are spheroidal to sub-spheroidal, 18.7 x 18.0 microm, with a smooth and bi-layered wall, c. 1.2 microm. The micropyle and oöcyst residuum are absent, but two polar granules are present. Its sporocysts are broadly ellipsoidal and 11.7 x 8.5 microm. Stieda and substieda bodies are present. A sporocyst residuum is present and the sporozoites have a refractile body and nucleus. Oöcysts of Eimeria sicki n. sp. are spheroidal to sub-spheroidal, 30.3 x 28.5 microm, with a smooth and bi-layered wall, c. 1.3 microm. The micropyle, oöcyst residuum and polar granule are absent. Its sporocysts are ellipsoidal, 18.4 x 10.0 microm. Stieda and substieda bodies are present. A sporocyst residuum is present and sporozoites have a refractile body and nucleus.
authors.affiliation: Curso de Pós-Graduação em Ciências Veterinárias, Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropédica, RJ, Brazil. bertobp@ufrrj.br
authors.forename: Bruno P
authors.initials: BP
authors.lastname: Berto
authors.forename: Hermes Ribeiro
authors.initials: HR
authors.lastname: Luz
authors.forename: Walter
authors.initials: W
authors.lastname: Flausino
authors.forename: Ildemar
authors.initials: I
authors.lastname: Ferreira
authors.forename: Carlos W G
authors.initials: CW
authors.lastname: Lopes
mesh_terms: D000818:Animals; D001938:Brazil; D003048:Coccidiosis / Q000662:veterinary*; D004539:Eimeria / Q000145:classification* / Q000166:cytology / Q000302:isolation & purification*; D007549:Isospora / Q000145:classification* / Q000166:cytology / Q000302:isolation & purification*; D021865:Isosporiasis / Q000662:veterinary*; D008853:Microscopy / Q000379:methods; D033661:Oocysts / Q000166:cytology; D015388:Organelles / Q000648:ultrastructure; D020308:Songbirds / Q000469:parasitology*