title: Light and scanning electron microscopy of Myxobolus porofilus sp. n. (Myxosporea: Myxobolidae) infecting the visceral cavity of Prochilodus lineatus (Pisces: Characiformes: Prochilodontidae) cultivated in Brazil.
abstract: Myxobolus porofilus sp. n. is described infecting the visceral cavity of Prochilodus lineatus (Valenciennes, 1836) cultivated in São Paulo State, Brazil. The plasmodial form of the parasite is 3-5 mm in length and appeared compressed between the wall of the visceral cavity and the pyloric caecum, reposing on this organ. The spores are small (length 5.7 +/- 0.3 microm, width 4.8 +/- 0.2 microm; mean +/- SD) and round to elliptical in frontal view. The valve surfaces are smooth and have sutural folds. The polar capsules are ovoid, small (length 1.6 +/- 0.1 microm, width 1.1 +/- 0.1 microm) and equal in size. The polar filaments have three turns aligned perpendicularly to the longitudinal axis of the capsule. A conspicuous polar filament pore is arranged at the anterior end of the spore. The only reaction observed upon histological analysis was the presence of a capsule of connective tissue surrounding the plasmodia. This is the first report of a myxosporean parasite in the Prochilodontidae.
authors.affiliation: Departamento de Parasitologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brasil.
authors.forename: Edson A
authors.initials: EA
authors.lastname: Adriano
authors.forename: Sarah
authors.initials: S
authors.lastname: Arana
authors.forename: Paulo S
authors.initials: PS
authors.lastname: Ceccarelli
authors.forename: Nelson S
authors.initials: NS
authors.lastname: Cordeiro
mesh_terms: D000818:Animals; D001938:Brazil; D056890:Eukaryota / Q000648:ultrastructure*; D005399:Fishes / Q000469:parasitology*; D008855:Microscopy, Electron, Scanning / Q000662:veterinary; D033761:Spores, Protozoan / Q000648:ultrastructure; D014781:Viscera / Q000469:parasitology