title: Xylochrysis lucida gen. et sp. nov., a new lignicolous ascomycete (Sordariomycetidae) with holoblastic conidiogenesis.
abstract: The monotypic genus Xylochrysis is introduced for a lignicolous perithecial ascomycete that possesses golden yellow ascomata with black glabrous necks, a three-layered ascomatal wall, persistent paraphyses, and cylindrical, long-stipitate unitunicate asci with an inamyloid apical annulus, and hyaline, ellipsoidal, unicellular ascospores. In culture it produces hyaline conidiophores with terminally arranged branches bearing metulae, conidiogenous cells and holoblastic conidia. Phylogenetic analysis of two ribosomal (nc18S and nc28S rDNA) and one protein-coding (RPB2) gene position this species within the Sordariomycetidae but without close ordinal or familial affiliation. Morphological and molecular DNA data support the recognition of this new genus and suggest that Xylochrysis is most closely related to the genera Ceratolenta, Cyanoannulus and Woswasia.
authors.affiliation: Department of Taxonomy, Institute of Botany of the Academy of Sciences, CZ-252 43, Průhonice, Czech Republic reblova@ibot.cas.cz.
authors.forename: Martina
authors.initials: M
authors.lastname: Réblová
authors.affiliation: Laboratory of Enzyme Technology, Institute of Microbiology of the Academy of Sciences, CZ-142 20 Prague, Czech Republic.
authors.forename: Václav
authors.initials: V
authors.lastname: Stěpánek
authors.affiliation: Hölderlinstrasse 25, D-15517 Fürstenwalde/Spree, Germany.
authors.forename: René K
authors.initials: RK
authors.lastname: Schumacher
mesh_terms: D001203:Ascomycota / Q000145:classification / Q000235:genetics / Q000254:growth & development / Q000302:isolation & purification*; D004271:DNA, Fungal / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D008031:Lignin / Q000378:metabolism; D008969:Molecular Sequence Data; D010802:Phylogeny; D013172:Spores, Fungal / Q000145:classification / Q000235:genetics / Q000254:growth & development* / Q000302:isolation & purification; D014934:Wood / Q000382:microbiology
chemical_list: D004271:DNA, Fungal; D004275:DNA, Ribosomal; D008031:Lignin
keywords: Sordariomycetes; Woswasia; holoblastic conidiogenesis; multigene analysis; systematics