title: Interrenal disease in bluegills (Lepomis macrochirus) caused by a new genus and species of myxozoan.
abstract: A myxozoan species not matching with any described genus was encountered in a survey of fish parasites of freshwater fishes in New York. The parasite was observed in the kidney tubules of bluegill sunfish Lepomis macrochirus. A new genus is described to accommodate Acauda hoffmani n. gen., n. sp., which exhibits pyriform spores with longitudinal ridges and polar capsules perpendicular to the sutural plane. Spores measure 17.9-21.8 µm long and 6.9-11.0 µm wide, with spore valves each with 11-12 ridges. Two polar capsules measure 9.4-12.5 µm long by 2.9-4.0 µm wide and contain a filament coiled 10-15 times. Phylogenetic analysis places A. hoffmani n. gen., n. sp. as a sister to a Myxobilatus and a Hoferellus species. The clustering of these 3 similar genera in the larger 'freshwater' clade of myxozoans does not support their inclusion in the Sphaerosporidae but instead supports the distinct status of the Myxobilatidae Shulman 1953.
authors.affiliation: SUNY-ESF, State University of New York College of Environmental Science and Forestry, Environmental and Forest Biology, 1 Forestry Drive, Syracuse, New York 13210, USA. cwhipps@esf.edu
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Whipps
mesh_terms: D000818:Animals; D001499:Bayes Theorem; D004275:DNA, Ribosomal / Q000737:chemistry; D005393:Fish Diseases / Q000469:parasitology*; D007674:Kidney Diseases / Q000469:parasitology / Q000662:veterinary*; D007684:Kidney Tubules / Q000469:parasitology; D060106:Lakes; D008855:Microscopy, Electron, Scanning; D055764:Myxozoa / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D009518:New York; D010273:Parasitic Diseases, Animal / Q000469:parasitology*; D010473:Perciformes / Q000469:parasitology*; D010802:Phylogeny; D012335:RNA, Ribosomal / Q000235:genetics; D013170:Spores / Q000648:ultrastructure
chemical_list: D004275:DNA, Ribosomal; D012335:RNA, Ribosomal