title: Myxobolus desaequalis n. sp. (Myxozoa, Myxosporea), parasite of the Amazonian freshwater fish, Apteronotus albifrons (Teleostei, Apteronotidae).
abstract: Myxobolus desaequalis n. sp. is described from the gill lamellae of the freshwater fish Apteronotus albifrons, collected in the Amazon River, near the city of Salvaterra, Brazil. Large spherical plasmodia filled with disporic pansporoblasts and spores were observed. Ellipsoidal to pyriform spores are 18.3 microm length x 11.2 microm width x 4.4 microm thickness. The anterior end of the spores contain two extremely unequal pyriform polar capsules measuring: (larger): 11.2 microm length, 4.9 microm width, and an isofilar polar filament with 11 to 12 turns obliquely to the longitudinal axis; (smaller): 4.6 microm length, 2.8 microm width, and an isofilar polar filament with 4 to 5 turns, obliquely to the longitudinal axis.
authors.affiliation: Department of Cell Biology, Institute of Biomedical Sciences and CIIMAR, University of Oporto, Lg. Prof Abel Salazar no.2, 4099-003 Porto, Portugal. azevedoc@icbas.up.pt
authors.forename: Carlos
authors.initials: C
authors.lastname: Azevedo
authors.forename: Laura
authors.initials: L
authors.lastname: Corral
authors.forename: Edilson
authors.initials: E
authors.lastname: Matos
mesh_terms: D000818:Animals; D001938:Brazil; D056890:Eukaryota / Q000145:classification* / Q000648:ultrastructure*; D005393:Fish Diseases / Q000469:parasitology*; D005399:Fishes / Q000469:parasitology; D005618:Fresh Water; D005880:Gills / Q000469:parasitology; D011529:Protozoan Infections, Animal / Q000469:parasitology*; D033761:Spores, Protozoan / Q000648:ultrastructure