title: Two new species of Myxozoa, Myxobolus inaequus sp. n. and Henneguya theca sp. n. from the brain of a South American knife fish, Eigemannia virescens (V.).
abstract: Two new species of Myxozoa from the brain of the green knife fish Eigemannia virescens are described: Myxobolus inaequus sp. n. has an unusually large spore body and extremely unequal polar capsules, and Henneguya theca sp. n. has an attenuated spore encased in a sheath not previously described in other Myxozoa . Only spores of the two species were observed, and infections caused no obvious pathological changes in the brain.
mesh_terms: D000818:Animals; D001921:Brain / Q000469:parasitology*; D001927:Brain Diseases / Q000469:parasitology / Q000662:veterinary*; D001938:Brazil; D056890:Eukaryota / Q000145:classification / Q000166:cytology* / Q000648:ultrastructure; D005393:Fish Diseases / Q000469:parasitology*; D005399:Fishes; D005618:Fresh Water; D011528:Protozoan Infections / Q000469:parasitology; D011529:Protozoan Infections, Animal; D013170:Spores / Q000166:cytology / Q000648:ultrastructure