title: Rhizidium phycophilum, a new species in Chytridiales.
abstract: Molecular and ultrastructural investigations are revealing unrealized diversity among chytrids as the taxonomic revision of order Chytridiales (Chytridiomycota) progresses. During a biodiversity survey of soil-inhabiting chytrids in Australia an undescribed chytrid was isolated from a soil sample collected in a cool temperate rainforest of New South Wales, Australia. Combined zoospore ultrastructure analysis and molecular phylogenetic analyses of partial LSU rRNA and ITS1-5.8S-ITS2 sequences demonstrated this chytrid was a new species within Chytridiales and possessed distinctive zoospore architecture previously unknown. Herein we delineate a new Rhizidium species in Chytridiales based on molecular monophyly and unique subcellular organization of the zoospore.
authors.affiliation: Department of Biological Sciences, The University of Alabama, Tuscaloosa, Alabama 35487, USA. picar001@bama.ua.edu
authors.forename: Kathryn T
authors.initials: KT
authors.lastname: Picard
authors.forename: Peter M
authors.initials: PM
authors.lastname: Letcher
authors.forename: Martha J
authors.initials: MJ
authors.lastname: Powell
mesh_terms: D008411:Chytridiomycota / Q000145:classification* / Q000235:genetics / Q000502:physiology / Q000648:ultrastructure; D004271:DNA, Fungal / Q000032:analysis; D021903:DNA, Ribosomal Spacer / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D016533:Mycological Typing Techniques; D009517:New South Wales; D010802:Phylogeny; D012339:RNA, Ribosomal, 28S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012988:Soil Microbiology; D013045:Species Specificity; D013172:Spores, Fungal / Q000648:ultrastructure; D014197:Trees
chemical_list: D004271:DNA, Fungal; D021903:DNA, Ribosomal Spacer; D012339:RNA, Ribosomal, 28S