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Hebeloma parvisporum is described as new and placed within H. sect. Porphyrospora. This mushroom is sold as an edible in markets of Laos under the local name "wai khom." Hebeloma sect. Porphyrospora is discussed and expanded to include the species formerly included in the genus Anamika and recently transferred to Hebeloma. Hebeloma sect. Porphyrospora currently comprises 16 species, 14 of which are known only from the western Pacific and Indian subcontinent. All species in this section share the character of having red-brown spores when fresh, atypical for other sections of Hebeloma, which causes the lamellae to be red-brown. However, this red-brown color fades when the material is dried. The close links, morphologically and molecularly, between H. parvisporum and other members of H. sect. Porphyrospora, particularly H. victoriense, are shown. [ABSTRACT FROM AUTHOR]

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. [ABSTRACT FROM AUTHOR]

Genes encoding the cellobiohydrolase enzyme (CBHI), designated as cbhI, were isolated from the basidiomycetes Auricularia fuscosuccinea, Pleurotus giganteus, P. eryngü, P. osfreatus, and P. sajor-caju. Initially, the fungal genomic DNA was extracted using a modified cetyltrimethyl ammonium bromide (CTAB) protocol and used as a DNA template. The cbhI genes were then amplified and cloned using the pGEM-T Easy Vector Systems. The sizes of these PCR amplicons were between 700~800 bp. The DNA sequences obtained were similar showing high identity to the cbhI gene family. These cbhI genes were partial consisting of three coding regions and two introns. The deduced amino acid sequences exhibited significant similarity to those of fungal CBHI enzymes belonging to glycosyl hydrolase family 7. [ABSTRACT FROM AUTHOR]

A well resolved phylogeny of the Agaricaceae based on partial rpb2 sequences is presented from a wide geographic and systematic sampling of the family and compared to phylogenies based on nrLSU and tef1 sequences. A smaller dataset of the family focusing on the Agaricus clade of nrITS sequences and a combined dataset were used to determine the position of several white-spored taxa from northern Thailand. Two new genera are described from Thailand. Coniolepiota accommodates Lepiota spongodes, a gray-lilac-purple floccose white-spored species with a wide distribution in tropical Asia; Eriocybe has a white wooly felt-like covering of pileus and stipe, white spores and is described with one new species E. chionea, so far known only from northern Thailand. These new genera are closely related to three genera with colored spores (viz. Agaricus, Heinemannomyces and Clarkeinda) and not to other white-spored taxa. [ABSTRACT FROM AUTHOR]