Two taxonomic novelties in the Sordariomycetidae: Ceratolenta caudata gen. et sp. nov. and Platytrachelon abietis gen. et comb. nov. for Ceratosphaeria abietis

Wood-inhabiting taxa of the Sordariomycetidae comprise several distantly related monotypic or small genera, which lack familial or ordinal affiliation and share a simple and inconspicuous morphology of dark ascomata with carbonaceous walls and long necks, stipitate asci and hyaline ellipsoidal, fusi...

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Bibliographic Details
Published in:Mycologia 2013-03, Vol.105 (2), p.462-475
Main Author: Reblova, Martina
Format: Article
Language:English
Subjects:
Annulatascaceae
Asci
Ascomycota
Ascomycota - classification
Ascomycota - cytology
Ascomycota - genetics
Ascomycota - isolation & purification
Ascospores
Base Sequence
Biological taxonomies
Caudata
DNA, Fungal - chemistry
DNA, Fungal - genetics
DNA, Ribosomal - chemistry
DNA, Ribosomal - genetics
Fresh water
Fungal Proteins - genetics
Fungi
Genera
Hyalin
Lentomitella
life history
Magnaporthaceae
Molecular Sequence Data
Phylogenetics
Phylogeny
RNA Polymerase II - genetics
Sequence Alignment
Sequence Analysis, DNA
Spores, Fungal - cytology
SYSTEMATICS
Taxa
three-gene phylogeny
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Summary:Wood-inhabiting taxa of the Sordariomycetidae comprise several distantly related monotypic or small genera, which lack familial or ordinal affiliation and share a simple and inconspicuous morphology of dark ascomata with carbonaceous walls and long necks, stipitate asci and hyaline ellipsoidal, fusiform to cylindrical ascospores. Recent collections of an undescribed fungus and of Ceratosphaeria abietis reveal two additional evolutionary lineages characterized by this simple and indistinct teleomorph morphology. Phylogenetic analysis of three genes, small and large subunit nuclear ribosomal DNA (nc28S and nc18S rDNA) combined with the second largest subunit of RNA polymerase II (rpb2), supports the recognition of two new genera, Ceratolenta and Platytrachelon for C. abietis. Platytrachelon abietis is redescribed and illustrated based on additional collections. In culture it produced a dematiaceous hyphomycetous anamorph with blastic conidiogenesis and ellipsoidal, septate, pale brown conidia. It was associated with a synanamorph producing cylindrical, strongly curved hyaline conidia. Molecular data suggest a relationship of Platytrachelon with the Papulosaceae, while Ceratolenta forms a monophylum on a separate branch. Both taxonomic novelties possess striking morphological similarities with Ceratosphaeria, Lentomitella and Rhodoveronaea, which recently were reinstated based on DNA sequence data. A key to morphologically similar wood-inhabiting fungi classified in the Sordariomycetidae is provided.
ISSN:0027-5514
1557-2536
DOI:10.3852/12-199