[logo]Persoonia

An International Mycological Journal

 

Volume 17 - 1 1998

Contents of this issue

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On the identity of the new taxa of Galerina (Agaricales), provisionally described by J.J. Barkman

Eef Arnolds & Bernhard de Vries

Descriptions are presented of thirteen species and five varieties of Galerina, provisionally described as new by the Dutch mycologist J.J. Barkman in 1969 and 1970. The descriptions and illustrations are based on the original descriptive notes and our own study of microscopic characters. The study was hampered by the poor condition of most exsiccata. Nevertheless, the majority of the provisional taxa could be identified as belonging to species described before.

Four provisional species could not be identified with certainty, but they show so much resemblance to existing species that there is no reason to consider them as new taxa. One provisional species, G. anomala, is strongly deviating from other Galerina species and does probably not belong to that genus. Its identity remains unknown. In addition, our study revealed useful information on the taxonomic significance and variability of some diagnostic characters in Galerina.

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Further Mycenas from the State of Paraná, Brazil

R.A. Maas Geesteranus & A.A.R. de Meijer

Seven new species of Mycena from the State of Paraná, Brazil, are described in section Sacchariferae, one species each in sections Nigrescentes and Granuliferae, and complementary notes are given of one species in section Polyadelphia. A key is provided for the species of section Sacchariferae thus far found in Paraná.

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An annotated list of the published names in Asteromella

S.G. Vanev & H.A. van der Aa

All species described in the coelomycetous genus Asteromella are listed with synonyms, literature data, and teleomorph connections, compiled from an extended literature. Measurements of pycnidia, diameter of the ostiolum and conidia of all species are given in a condensed form.

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MacrolepiotaNotulae ad Floram agaricinam neerlandicam - XXXII.

R.P.J. de Kok & E.C. Vellinga

Critical notes on the taxonomy and nomenclature of the Dutch Macrolepiota species with ring with double crown are given. Macrolepiota bohemica (Wichansky) Krieglst. & Pázmány is regarded as a synonym of M. rachodes (Vitt.) Sing. The new combination M. rachodes f. olivieri (Barla) de Kok is made. Macrolepiota mastoidea (Fr.: Fr.) Sing., M. gracilenta (Fr.) Mos. and M. rickenii (Velen.) Bellů & Lanzoni are synonymized. Macrolepiota permixta (Barla) Mos. is considered merely a variant of M. procera (Scop.: Fr.) Sing.; notes on the nomenclature of M. nympharum (Kalchbr.) Wasser are presented. Agaricus emplastrum Cooke & Mass. and A. tepidarius Weinm. are regarded as nomina dubia.

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Contributions towards a monograph of Phoma (Coelomycetes)- VII. Section Sclerophomella: Taxa with thick-walled pseudoparenchymatous pycnidia

G.H. Boerema & J. de Gruyter

This paper deals with ten species of Phoma, characterized by thick-walled pseudoparenchymatous pycnidia. They superficially resemble the thick-walled pycnidial phenotype in species of Phoma sect. Plenodomus, but scleroplectenchyma is lacking and teleomorphs belong to Didymella, not Leptosphaeria. Keys and indices of host-fungus and fungus-host relations are provided and short comments on the ecology and distribution of the taxa are given.

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Type studies in the genus Coprinus (Coprinaceae, Agaricales). Coprinus xerophilus, a new record in Europe

G. Moreno & M. Heykoop

In the present study a comparison of the holotypes of Coprinus calyptratus, C. vosoustii, C. asterophorus and C. asterophoroides has been carried out. As a conclusion of the latter we can state that all of them are conspecific, the correct name of this taxon being C. calyptratus. On the other hand the study of the type of Coprinus xerophilus, a vernal species which occurs in xerothermic plant communities on calcareous and gypsiferous soils, shows that this taxon is very close to C. calyptratus. Finally, we have studied the type of C. arenarius, a species which shares the same habitat as both C. calyptratus and C. xerophilus, and conclude that the former is different, being a species in its own right, known only from Africa. Coprinus xerophilus is a new record for the European mycobiota.

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Pholiota gymnopoda comb. nov., a redescription of a forgotten species

A.F.M. Reijnders

A description is given of the remarkable species Pholiota (Flammula) gymnopodia, which was found in 1939. It was identified by Mr. A.C.S. Schweers; since then, this species has not been recorded from the Netherlands nor from any other country in Europe. It is mentioned in most taxonomic works of the end of the 19th and the beginning of the 20th century, but it is completely absent from the more recent literature. The new combination Pholiota gymnopodia is proposed.

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Two rare coprophilous ascomycetes from Norway

J. van Brummelen & R. Kristiansen

Two uncommon coprophilous ascomycetes, Ascobolus cervinus and Caccobius minusculus, only recorded once, each from two different continents, are reported for the first time from Norway. Both are provided with new descriptions and compared with authentic material.

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Studies of Lactarius from Mexico: a new species in subgenus Piperites

L. Montoya, V.M. Bandala & G. Moreno

Lactarius lacteolutescens is described as a new member in subgenus Piperites subsect. Croceini. It was found growing in a mixed forest of Pinus spp. and Abies hickellii, at Mt. Cofre de Perote, Central Region of the State of Veracruz (Gulf Area, Mexico).

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Squamanita citricolor, a new species from Central Africa

C. Bas & D. Thoen

The new Squamanita citricolor is described from Zaire (Democratic Republic of Congo). It has a medium-sized basidiocarp characterized by a glabrous yellow pileus, a whitish to yellowish stipe rising from an ochraceous yellow, obconical, deeply rooting basal bulb, and very thick-walled fusiform pleuro- and cheilocystidia. Because it has to be assumed now that all Squamanita species are mycoparasites and that the basal body formerly called protocarpic tuber is in fact a deformed basidiocarp of another species infected by Squamanita mycelium it is proposed that the term "protocarpic tuber" is replaced by the new term "cecidiocarp".

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Validation of Hydropus scabripes var. quadrisporus and Pseudobaeospora frieslandica

C. Bas

Arnolds et al. (1995: 232) announced the publication of Hydropus scabripes var. quadrisporus, but until now this did not appear. The creation of this variety became necessary when it turned out that the type of H. scabripes (Murrill) Sing. has 2-spored basidia.

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Entoloma exiguum, a new species of subgenus Claudopus (Entolomataceae, Agaricales) from Spain

F. Esteve-Raventós & M. De La Cruz

Entoloma exiguum sp. nov. is described. It belongs to subgenus Claudopus and is characterized by the tiny size, very reduced stipe, white colours of the fruit-bodies, tapering pileus hairs and spores with 6ń8 angles. A discussion about some other close taxa is given, as well as drawings of micromorphological characters.

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Mycena verna, a new springtime species of section Fragilipedes from Germany

R.A. Maas Geesteranus

Mycena verna, a vernal species collected in western Germany, is described as a member of section Fragilipedes and compared with other species of the section.

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Dermoloma cystidiatum, a new species of Dermoloma (Agaricales) from India

P. Manimohan & E. Arnolds

Dermoloma cystidiatum, collected in grassland in Kerala, India, is proposed as a new species belonging in section Atrobrunnea. It is compared with other species of this section. The sterile lamella edge lined with cheilocystidia is unique in Dermoloma so far.

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Last modified December 8, 1998 by P. Hovenkamp.