Showing papers by "Gary J. Samuels published in 1997"

Revision of Trichoderma sect. Longibrachiatum including related teleomorphs based on analysis of ribosomal DNA internal transcribed spacer sequences.

Abstract: Variation within the internal transcribed spacer (ITS-1 and ITS-2) regions of ribosomal DNA of 103 strains was studied to examine relationships within Trichoderma sect. Longibrachiatum and related teleomorphs, Hypocrea schweinitzii and H. jecorina. The four species, T longibrachiatum, T. pseudokon- ingii, T parceramosum and T citrinoviride, that were originally assigned by morphological criteria to this section were recognized by sequence analysis. Trich- oderma reesei, which was previously considered to be synonymous with T longibrachiatum, and T saturnis- porum which was placed originally in sect. Saturnis- porum because of its warted conidia, are assigned to the section. ITS sequences of T ghanense, originally assigned to sect. Saturnisporum, could not be distin- guished from the sequence of T parceramosum, in- dicating that the two may be synonymous. Trichoder- ma "todica", an unpublished name based on the an-

Notes on and additions to the Niessliaceae (Hypocreales)

Abstract: The ascomycete family Niessliaceae presently includes the genera Cryptoniesslia, Melanopsamma, Niesslia, Taiwanascus, Trichosphaerella, and Valetoniella. To this assemblage are added the newly described Circinoniesslia, with C. nectriae, and Valetoniellopsis, with V. laxa as their respective type species. The synonymy of Pseudorhynchia with Trichosphaeria is not accepted, and Pseudorhynchia is redescribed based on its type species. Melanopsamma pomiformis is redescribed and illustrated. Other newly described species are Melanopsamma verrucosa, Valetoniella pauciornata, and Valetoniella claviornata. The family Taiwanascaceae, described for the cleistothecial Taiwanascus tetrasporus, is placed in synonymy with the Niessliaceae. Trichosphaerella arecae is transferred to Neorehmia, and that genus is excluded from the family. Key words: Ascomycetes, Cryptoniesslia, Melanopsamma, Niesslia, Pseudorhynchia, systematics, Taiwanascus, Trichosphaerella, Valetoniella, Valetoniellopsis.

Fungicolous pyrenomycetes 1. Helminthosphaeria and the new family Helminthosphaeriaceae.

Abstract: Helminthosphaeria, a genus of pyrenomy- cetes, is monographed. Its members occur on basi- diomata of species of the Aphyllophorales. The fol- lowing species are included: H. clavariarum, the type, H. odontiae, H. corticiorum, and the new species H. hyphodermiae. A new family, Helminthosphaeriaceae, is proposed for the genus. Litschaueria is found to be a synonym of Helminthosphaeria.

Fungicolous pyrenomycetes 2. Ascocodinaea, gen nov., and reconsideration of Litschaueria

Abstract: The name Litschaueria corticiorum was found to have been misapplied to a common pyrenomycete that occurs on old basidiomata of Stereum species. The new genus and species Ascocodinaea stereicola is proposed for it; its proven anamorph is a Codinaea species. A second new species, A. polyporicola, which occurs on old basidiomata of Polyporus species, is also proposed; its presumed anamorph is also a Codinaea species.

Two new hypocrealean fungi with synnematous anamorphs

Abstract: The two new Ascomycetes (Hypocreales), Valsonectria simpsonii and Hypocrea cinereoflava, are described. Valsonectria simpsonii produces immersed groups of perithecia with orange ostioles. I...