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Stud Mycol 56(1): 39-65 2006
DOI: 10.3114/sim.2006.56.02
Copyright © 2006 CBS Fungal Biodiversity Centre
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Taxonomy and phylogenetic relationships of nine species of Hypocrea with anamorphs assignable to Trichoderma section Hypocreanum

Barrie E. Overton1,*, Elwin L. Stewart2 and David M. Geiser2

1 The Pennsylvania State University, Department of Plant Pathology, Buckhout Laboratory, University Park, Pennsylvania 16802, U.S.A.: Current address: Lock Haven University of Pennsylvania, Department of Biology, 119 Ulmer Hall, Lock Haven PA, 17745, U.S.A.
2 The Pennsylvania State University, Department of Plant Pathology, Buckhout Laboratory, University Park, Pennsylvania 16802, U.S.A.

* Correspondence: Barrie E. Overton, boverton{at}lhup.edu

Morphological studies and phylogenetic analyses of DNA sequences from the internal transcribed spacer (ITS) regions of the nuclear ribosomal gene repeat, a partial sequence of RNA polymerase II subunit (rpb2), and a partial sequence of the large exon of tef1 (LEtef1) were used to investigate the taxonomy and systematics of nine Hypocrea species with anamorphs assignable to Trichoderma sect. Hypocreanum. Hypocrea corticioides and H. sulphurea are reevaluated. Their Trichoderma anamorphs are described and the phylogenetic positions of these species are determined. Hypocrea sulphurea and H. subcitrina are distinct species based on studies of the type specimens. Hypocrea egmontensis is a facultative synonym of the older name H. subcitrina. Hypocrea with anamorphs assignable to Trichoderma sect. Hypocreanum formed a well-supported clade. Five species with anamorphs morphologically similar to sect. Hypocreanum, H. avellanea, H. parmastoi, H. megalocitrina, H. alcalifuscescens, and H. pezizoides, are not located in this clade. Protocrea farinosa belongs to Hypocrea s.s.

Taxonomic novelties: Hypocrea eucorticioides Overton, nom. nov., Hypocrea victoriensis Overton, sp. nov., Hypocrea parmastoi Overton, sp. nov., Hypocrea alcalifuscescens Overton, sp. nov.

Keywords Ascomycetes / Hypocreales / Hypocreanum / Hypocrea corticioides / H. egmontensis / H. parmastoi / H. alcalifuscescens / H. subsulphurea / H. farinosa / H. subcitrina / H. sulphurea / H. victoriensis / ITS rDNA / Lentinula edodes / systematics / rpb2 gene sequences / tef1 gene sequences / Trichoderma




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