Light and electron microscopy of the spore of Myxobolus heckelii n. sp. (Myxozoa), parasite from the Brazilian fish Centromochlus heckelii (Teleostei, Auchenipteridae). Journal of Eukaryotic Microbiology, 56(6), November-December 2009: 589-593. 592 [Zoological Record Volume 147]