title: Three new genera in Chytridiales from aquatic habitats in Argentina.
abstract: Sampling for chytrids in a variety of habitats has resulted in pure cultures that when analyzed have yielded hypotheses of relationships based on molecular and zoospore ultrastructural markers. To extend our understanding of diversity of Chytridiales in eastern Argentina and USA, we isolated and examined the morphology, ultrastructure and 28S and ITS1-5.8S-ITS2 rDNA sequences of numerous chytrids from aquatic habitats from these two regions. Three family-level lineages (Chytridiaceae, Chytriomycetaceae, family incertae sedis) are represented in our molecular phylogeny, and three new genera (Avachytrium, Odontochytrium in Chytriomycetaceae, Delfinachytrium in family incertae sedis) are described. These findings of new genera and species emphasize the potential for discovery of additional diversity.
authors.affiliation: Departamento de Biodiversidad y Biología, Experimental, Universidad de Buenos Aires, PRHIDEB-CONICET, C1428EHA Buenos Aires, Argentina.
authors.forename: Carlos G
authors.initials: CG
authors.lastname: Vélez
authors.forename: Peter M
authors.initials: PM
authors.lastname: Letcher
authors.forename: Sabina
authors.initials: S
authors.lastname: Schultz
authors.forename: Gabriela
authors.initials: G
authors.lastname: Mataloni
authors.forename: Emilie
authors.initials: E
authors.lastname: Lefèvre
authors.forename: Martha J
authors.initials: MJ
authors.lastname: Powell
mesh_terms: D001118:Argentina; D001483:Base Sequence; D008411:Chytridiomycota / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000648:ultrastructure*; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D017753:Ecosystem; D014644:Genetic Variation; D046529:Microscopy, Electron, Transmission; D008969:Molecular Sequence Data; D009656:North America; D010802:Phylogeny; D012339:RNA, Ribosomal, 28S / Q000737:chemistry / Q000235:genetics; D017422:Sequence Analysis, DNA; D012988:Soil Microbiology; D013172:Spores, Fungal
chemical_list: D004271:DNA, Fungal; D004275:DNA, Ribosomal; D012339:RNA, Ribosomal, 28S
keywords: chytrid; morphology; phylogeny; systematics; ultrastructure; zoospore