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Rimont, France

Fournier J.,Las Muros | Hyde K.D.,Mae Fah Luang University
Fungal Diversity | Year: 2010

A new ascomycete genus, Achroceratosphaeria, is described for three lignicolous species from freshwater and terrestrial habitats in Asia and Europe on the basis of morphological studies and phylogenetic analysis of combined nc28S (LSU) and nc18S (SSU) rDNA sequence data. The new genus is characterized by minute, hyaline or subhyaline to pale brown perithecia immersed in the substratum with hyaline to subhyaline emergent necks. Paraphyses disintegrate with age, asci are cylindricalclavate with a distinct apical annulus containing eight hyaline ascospores; ascospores are smooth-walled, ranging from ellipsoidal to fusiform to cylindrical-fusiform, without a mucilaginous sheath or appendages. All three species were obtained after incubation in a moist chamber. Achroceratosphaeria resembles Ceratosphaeria, Pseudohalonectria or Clohiesia in ascospore morphology, but molecular data do not support these relationships. In our phylogeny, a relationship between Achroceratosphaeria and taxa in the Lulworthiales and Koralionastetales is confirmed. Ceratosphaeria incolorata is transferred to Achroceratosphaeria and a new combination is proposed. A key to the species accepted in Achroceratosphaeria is provided. © Kevin D. Hyde 2010. Source

Miller A.N.,University of Illinois at Urbana - Champaign | Huhndorf S.M.,The Field Museum | Fournier J.,Las Muros
Mycologia | Year: 2014

In an ongoing effort to monograph the genus Lasiosphaeria, it is desirable to obtain estimates of the phylogenetic relationships for five uncommon species, L. coacta, L. munkii, L. punctata, L. sphagnorum and L. stuppea. Three additional species previously placed in Lasiosphaeria, Echinosphaeria canescens, Hilberina caudata and Ruzenia spermoides, also were included in this study as well as three undescribed species. These species were believed to have relations elsewhere based on various ambiguous morphological characters, so an independent dataset from one or more genes was used to resolve their phylogenetic affinities. Sequences from the nuclear ribosomal 28S large subunit (LSU) and b-tubulin genes were generated for these taxa. Maximum likelihood and Bayesian analyses indicated these taxa form a well supported monophyletic group with members of the Helminthosphaeriaceae and therefore, should be transferred out of Lasiosphaeria. Except for Helminthosphaeria gibberosa, Hilberina elegans, Ruzenia spermoides and Synaptospora plumbea, all taxa within this clade possess ascomata with distinct thick-walled setae. Based on a combination of morphological and molecular data, Helminthosphaeria tomaculum, Helminthosphaeria triseptata and Hilberina robusta are described as new and four new combinations are proposed: Helminthosphaeria ludens, Hel. stuppea, Hilberina punctata and H. sphagnorum. Ten new combinations are proposed based on morphological data: Echinosphaeria heterostoma, Helminthosphaeria flavocompta, Hel. gibberosa, Hel. heterotricha, Hilberina breviseta, H. elegans, H. foliicola, H. meznaensis, H. moseri and H. rhynchospora. Lasiosphaeria coacta is placed in synonymy with Hel. ludens and the previous transfer of Hilberina munkii is accepted. Synaptospora plumbea was found to belong in the family. Illustrations are provided for most Helminthosphaeriaceae taxa seen in this study. © 2014 by The Mycological Society of America. Source

Jaklitsch W.M.,University of Vienna | Fournier J.,Las Muros | Rogers J.D.,Washington State University | Voglmayr H.,University of Vienna
Persoonia: Molecular Phylogeny and Evolution of Fungi | Year: 2014

The genus Lopadostoma (Xylariaceae, Xylariales) is revised. Most species formerly assigned to Lopadostoma do not belong to the genus. Twelve species are herein recognised, of which two are only known from morphology. Ten species, of which six (L. americanum, L. fagi, L. insulare, L. lechatii, L. meridionale and L. quercicola) are newly described, are characterised by both morphology and DNA phylogeny using LSU, ITS and rpb2 sequences. Morphologically, ecologically and phylogenetically Lopadostoma is a well-defined genus comprising exclusively species with pustular pseudostroma development in bark of angiospermous trees. Phaeosperma ailanthi, Phaeosperma dryophilum and Sphaeria linosperma are combined in Lopadostoma. Lopadostoma gastrinum is neotypified and L. turgidum is lecto- and epitypified. Species with asci and ascospores similar to those of Lopadostoma but having perithecia immersed in wood, particularly those of Lopadostoma subg. Anthostomopsis have been determined to be unrelated to the genus. DNA data confirm that Anthostoma is unrelated to Lopadostoma. Its type and currently only confirmed species Anthostoma decipiens belongs to Diatrypaceae. DNA data also show that L. pouzarii and Barrmaelia macrospora are unrelated to Lopadostoma. A commentary is provided for names in Lopadostoma and those names in Anthostoma that may be putative species of Lopadostoma based on their protologues. Anthostoma insidiosum is an older name for Anthostomella (Diatrype) adusta. © 2014 Naturalis Biodiversity Center & Centraalbureau voor Schimmelcultures. Source

Fournier J.,Las Muros | Lechat C.,64 route de Chize
Mycotaxon | Year: 2011

The authors describe a new species of Eutypella (Diatrypaceae, Xylariales) based on several collections on Suaeda vera in France and one on Salsola vermiculata in Spain. The Libertella-like asexual state was obtained in culture. © 2011. Mycotaxon, Ltd. Source

Kuhnert E.,Helmholtz Center for Infection Research | Fournier J.,Las Muros | Persoh D.,University of Bayreuth | Luangsa-Ard J.J.D.,National Center for Genetic Engineering and Biotechnology | Stadler M.,Helmholtz Center for Infection Research
Fungal Diversity | Year: 2014

Three new species of Hypoxylon (Xylariaceae) collected from Martinique in the French Caribbean are recognised by new combinations of morphological characters. Their status as undescribed taxa was supported by secondary metabolite profiling based on High performance liquid chromatography with diode array and mass spectrometric detection (HPLC/DAD-MS) as well as by comparison of ITS and partial ß-tubulin DNA sequences with related taxa. In the course of this study, the teleomorph of Nodulisporium griseobrunneum was found, and this species could be transferred to Hypoxylon. Moreover, several names in Hypoxylon are epitypified by selecting recently collected specimens from the same geographic areas as the holotypes came from. Despite the fact that our study used the hitherto most extensive taxon sampling, the phylogenetic analyses inferred from ITS and ß-tubulin sequences remain contradictory to each other, and neither genealogy was found fully in agreement with phenotype-derived traits. We conclude that the right gene (or multi-gene genealogies) to reflect the phylogeny and evolution of Hypoxylon still remains to be found. For the time being, we recommend that the application of polyphasic taxonomic concepts should be continued in taxonomic studies of Hypoxylon. © 2013 Mushroom Research Foundation. Source

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