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PersooniaPersooniaVolume 17 - 4 2002
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Thirteen Crepidotus taxa collected in Mexico and the south-eastern USA are described and illustrated. One new infraspecific taxon of C. croceitinctus is proposed, var. aurantiacus. Type material of C. ellipsoideus and C. occidentalis has been re-examined.
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In this paper eleven species of Phoma with obvious setose pycnidia, grouped in the section Paraphoma, are documented and described. Most of these species were formerly classified in Pyrenochaeta. The following new taxa have been proposed: Phoma briardii nom. nov., Phoma carteri nom. nov., Phoma glycinicola nom. nov., Phoma indica (T.S. Viswan.) comb. nov., Phoma setariae (H.C. Greene) comb. nov. and Phoma leveillei var. microspora var. nov. Indices on host/substratum-fungus and fungus-host relations are included and short comments on the ecology and distribution of the taxa are given.
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Six species of Amanita (Amanitaceae, Basidiomycota, Fungi), collected in the Pakaraima Mountains of Guyana, are described; four as new and two as new records for Guyana: A. aurantiobrunnea spec. nov., A. calochroa spec. nov., A. cyanopus spec. nov., A. perphaea spec. nov., A. lanivolva Bas, and A. xerocybe Bas. All six species have been collected in forests dominated by Dicymbe (Caesalpiniaceae) and are assumed to be ectomycorrhizal. Amanita perphaea is commonly eaten by Patamona Indians and is called ‘Pulutukwe’.
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Comparative thin-layer chromatography – for the first time applied to Omphalotus olivascens var. olivascens, O. olivascens var. indigo, O. nidiformis, and to O. mexicanus – revealed strikingly similar pigment patterns for all Omphalotus species except O. mexicanus. Atromentin, thelephoric acid and pulvinic acid derivates were found in dried material and/or culture extracts of all species. Illudin S and illudin M were detected in O. mexicanus by high-performance liquid chromatography-atmospheric pressure chemical ionisation mass spectrometry. Data on morphological features of all described Omphalotus and Lampteromyces species are listed, illustrated, and summarized in a key. New combinations in the genus Omphalotus are proposed for Lampteromyces japonicus and L. mangensis.
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Ceratobasidium albasitensis is described as a new species based on morphological data and on phylogenetic reconstruction from rDNA sequences, including representatives of other related species. Isolates of this species were found in several localities within Albacete province (SE of Spain). This taxon is part of the Rhizoctonia s.l. species complex and is placed in the genus Ceratobasidium (Stat. Anam. = Ceratorhiza) on account of its macro- and micromorphological features. In addition, two new methods to induce sexual sporulation on plates are described.
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Bolbitius elegans spec. nov., a new species with gasteroid habit, is described and illustrated. Its taxonomic relationships with other taxa of Bolbitius and members of presumably related secotioid-gasteroid genera are discussed.
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Three new species of Entoloma s.l. from Kerala State, India are described, illustrated and discussed. Entoloma haematinum, a very small, bright red, omphalinoid species, reminiscent of Hygrocybe cantharellus, is unique because of its quadrate-cuboid spores; it fits well in subgenus Omphaliopsis. Entoloma nubilum and E. carneum are both characterised by their small, pleurotoid basidiocarps. The first is related to the species of subgenus Leptonia; the second fits better in subgenus Claudopus. Comments are given on the taxonomic position of the new species.
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Hydropus paradoxus var. xerophyticus, characterized by its long cystidia, broad spores and habitat in xerophytic basic pastures with communities of Thymus-Lavandula spp. is described as a new taxon from Spain. In addition, a key to 22 taxa known from Europe is given.
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Terfezia boudieri is reported for the first time from the Iberian Peninsula and Europe. It is illustrated and compared with material and descriptions of similar Terfezia species T. arenaria, T. claveryi and T. leptoderma. Specimens of T. boudieri from Spain were also compared with those from Morocco.
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A new species of nivicolous myxomycetes, Diderma cristatosporum is described from Spain and compared with the type of D. subdictyospermum. LM and SEM photographs of the microscopical characters are provided.
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A new coprophilous species of Coprotus (Pezizales, Pyronemataceae) is described and reported from five localities of the Ardennes (Belgium). Within the genus, it belongs to a group of species mainly identified by the presence of carotenoids within the paraphyses. It could not be identified as any of the 25 species known, but is closest to C. ochraceus.
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Gymnopus castaneus, characterized by its reddish-brown colour and lack of hymenial cystidia, is described as new from Spain. In addition, the new combination Gymnopus brunnescens (Murrill) Villarreal, Heykoop & Esteve-Rav. is proposed.
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Dermoloma magicum is proposed as a new species, characterised by reddening, then blackening basidiocarps, a unique feature within the genus Dermoloma. The species has been collected in grasslands in the Netherlands and Scotland. The collections were initially identified as Porpoloma metapodium. The differences with that fungus and with related Dermoloma species are discussed.
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