An ophiosphaerella-like species was collected from dead stems of a grass (Poaceae) in Northern Thailand. Combined analysis of LSU, SSU and RPB2 gene data, showed that the species clusters with Lentithecium arundinaceum, Setoseptoria phragmitis and Stagonospora macropycnidia in the family Lentitheciaceae and is close to Katumotoa bambusicola and Ophiosphaerella sasicola. Therefore, a monotypic genus, Poaceascoma is introduced to accommodate the scolecosporous species Poaceascoma helicoides. The species has similar morphological characters to the genera Acanthophiobolus, Leptospora and Ophiosphaerella and these genera are compared.
Tag: phylogenetic
Diversity of Lepiota (Agaricales) in northern Thailand
A study of diversity of Lepiota species in northern Thailand was carried out in Chiang Mai and Chiang Rai provinces during the period 2007–2010. In total, 73 Lepiota mushrooms were collected representing 33 species from five sections. The distribution of these Lepiota species were as follows: 11 species of section Stenosporae, 8 of Ovisporae, 6 of Lepiota, 5 of Lilaceae, and 3 of Echinatae. The highest diversity of Lepiota species was found in the section Stenosporae as indicated by the H′ index (2.20), followed by Lepiota (1.7), Ovisporae (1.54), Lilaceae (1.42), and Echinatae (0.87). The species number of Lepiota was generally high in Mae Sa Valley (8), Forest of Pha Deng Village (7), Forest of Doi Ngaem (6), and Forest of Pong Duaed (5). The most commonly found species were L. furfuraceipes (14.1 %), L. sp. 6 (10.9 %), L. citrophylla (7.81%), L. aspera and L. fraterna (6.25%). Appearance of Lepiota species throughout the season is dependent on rain and humidity and the highest number of Lepiota species appeared in June to August, when high rainfall occurs. This study is one of the pioneering works dealing with the Lepiota species in Thailand in terms of their diversity and distribution.
An exciting novel member of Lentitheciaceae in Italy from Clematis vitalba
Dothideomycetes with muriform ascospores, were previously placed in family Pleosporaceae, but they are not a monophyletic group, and can be placed across a range of orders and families. In this study an interesting saprobic ascomycete was isolated from Clematis vitalba which was collected in Italy. The species has unique characters and we introduced the taxon as a new genus and species within Lentitheciaceae, The conclusions are drawn from morphology and, LSU, SSU, EF1- and RPB2 combined sequence analyses. Maximum parsimony (MP), maximum likelihood (ML) and Mr Bayes phylogenetic analysis all support this being a distinct genus within the Lentitheciaceae. It is distinguished from other genera of this family in having muriform ascospores whose central cells have longitudinal septa and light end cells, and ascomata with a thick peridium and a short neck. The new genus is compared with similar genera in the Lentitheciaceae and a comprehensive description, and micrographs are provided. The cultures were obtained via single ascospore isolation, and the asexual state was also established.
Vamsapriya (Xylariaceae) re-described, with two new species and molecular sequence data
Vamsapriya comprises two species from bamboo and is characterized by erect, rigid, dark brown, synnematous conidiophores, monotretic conidiogenous cells and brown to dark brown, septate, conidia in chains. Vamsapriya indica, the generic type of Vamsapriya, was recollected and isolated from bamboo culms in Chiang Rai Province, Thailand and is described, illustrated and epitypified in this paper. Two new species in the genus were also discovered and are introduced as V. khunkonensis and V. bambusicola. The new species differs from the type and the other known species, V. mahabaleshwarensis, in the shape and size of the conidia. Maximum-parsimony (MP) analysis of combined LSU, SSU and RPB2 sequence data and Bayesian analysis based on multi-gene data set of betatubulin, ITS, LSU, and RPB2 show Vamsapriya belongs in Xylariaceae, Xylariales