Content uploaded by Ronald Petersen
Author content
All content in this area was uploaded by Ronald Petersen on May 24, 2017
Content may be subject to copyright.
The North American Species of Psathyrella.
... Psathyrella (Fr.) Quél. is one of the larger genera of Agaricales Underw. comprising about 730 species (index fungorum, 2019), since Fries established the tribe Psathyrella under Agaricus Murrill (Fries 1838;Smith 1972;Kits van Waveren 1985;Örstadius & Kundsen 2012). Traditionally, they were classified in Coprinaceae Roze ex Overeem subfamily Psathyrelloideae (Hawksworth et al. 1983;Hawksworth et al. 1995;Kirk et al. 2001), but Redhead et al. (2001) incorporated them into Psathyrellaceae Vilgalys, Moncalvo & Redhead, based on phylogenetic analysis. ...
... Some other species with the same size of spores, belonging to the subsection, can be separated as follows: the germ pores of basidiospores of P. cortinarioides [synonyms P. frustulenta (Fr.) A.H. Sm.] and P. atomatoides (synonyms P. rannochii Kits van Wav.) are either absent or indistinct (Orton 1960;Smith 1972 (Smith 1972). ...
... Some other species with the same size of spores, belonging to the subsection, can be separated as follows: the germ pores of basidiospores of P. cortinarioides [synonyms P. frustulenta (Fr.) A.H. Sm.] and P. atomatoides (synonyms P. rannochii Kits van Wav.) are either absent or indistinct (Orton 1960;Smith 1972 (Smith 1972). ...
Psathyrella tintinnabula is discovered in Yunnan Province of China, which is characterized by its small-sized basidiomata, bell-shape pileus, small-sized basidiospores and fusiform pleurocystidia with subacute apex. The studies of morphological characteristics and phylogenetic analyses showed that the new species is unique and evidently distinct from related species within the genus Psathyrella. Detailed description, color photos, illustrations and key to related species are presented.
... which consists of 1,030 records in Index Fungorum (http://www.indexfungorum.org), comprising approximately 500 species (Smith 1972;Kits van Waveren 1985;Örstadius and Kundsen 2012;). It is characteristic of fragile basidiomata, hygrophanous pileus, brown to Specimens are deposited in the Herbarium of Mycology, Jilin Agricultural University (HMJAU). ...
... & Broome) P. D. Orton does not have a germ pore in this subsection, but basidiospores of P. clivensis are obviously broader, 8-10 × 5.5-6.5 μm and ellipsoid to ovoid (Kits van Waveren 1985). It can also be classified in section Fatuae (Smith 1972), some species having sturdy stipe and utriform cystidia, but they can be clearly distinguished from P. conica by other micromorphology. Psathyrella acadiensis A.H. Sm. has smaller basidiospores, which are only up to 6.0 μm long; P. albocinerascens A.H. Sm. has an obvious germ pore and white pileus in the early stage; P. amarella A.H. Sm. and P. spadiceogrisea (Schaeff.) ...
... Psathyrella acadiensis A.H. Sm. has smaller basidiospores, which are only up to 6.0 μm long; P. albocinerascens A.H. Sm. has an obvious germ pore and white pileus in the early stage; P. amarella A.H. Sm. and P. spadiceogrisea (Schaeff.) Maire have an obvious germ pore; P. vesiculocystis A.H. Sm. has pedicellate-pleurocystidia (Smith 1972). Furthermore, P. terrestris Natarajan has aspects of P. conica, whose pileus is umbonate, but it has broadly utriform pleurocystidia and its basidiospores are dark brown, subglobose and up to 8.5 μm broad (Natarajan 1978). ...
Twenty seven species of Psathyrella have been found in Northeast China. Amongst them, P.conica , P.jilinensis , P.mycenoides and P.subsingeri are described as new species, based on studying morphological characteristics and phylogenetic analyses. Detailed morphological descriptions, line drawings and photographs of the new species are presented. Phylogenetic analysis of the nuclear ribosomal internal transcribed spacer (ITS) region and an identification key to the 27 Psathyrella species occuring in Northeast China are provided.
... In previous studies of Psathyrella, there are approximately 100 taxa lacking pleurocystidia, but this feature has not been used as a key distinguishing feature (Fries 1838;Smith 1972;Kits van Waveren 1985;Örstadius and Kundsen 2012;Battistin et al. 2014). Based on extensive specimen collection, morphological studies and phylogenetic analyses, Candolleomyces has been separated from Psathyrella as a new genus and it differs from Psathyrella s.s. in lacking pleurocystidia. ...
Three new species, Candolleomyces incanus , C. subcandolleanus and C. yanshanensis , were found and described from Yanshan Mountains in China. The identification is based on morphological observation combined with phylogenetic analysis of ITS-LSU- Tef1α - TUB2 . This study enriched the species diversity of Candolleomyces in Yanshan Mountains and provided important data support for the systematic study of Candolleomyces in the future.
... Together with this last genus, Tubaria (W.G. Sm.) Gillet and Phaeomarasmius include agaricoid mushrooms, many of them lignicolous, with brown spore print, mostly small basidiomata and a simple, dry, filamentous pileipellis; in the past, many species of these genera where included in the wide genus Naucoria Fr. (SINGER, 1950;KÜHNER & ROMAGNESI, 1953), or interpreted as small species of Pholiota (SMITH & HESLER, 1968). Traditionally, mycologists have considered that Tubaria species can be easily recognized macroscopically by the (sub-)decurrent lamellae, whereas in Flammulaster and Phaeomarasmius they are emarginate to adnate; the latter can be distinguished by the more complex pileipellis of Flammulaster, which shows more or less isodiametric to short, wide elements or cells in the hyphae of the pileipellis (sometimes wrongly called "sphaerocysts" or better, sphaerocytes), contrasting with the more simple, filamentous, elongate and regular articles of Phaeomarasmius (VELLINGA, 1986); Phaeomarasmius excentricus Scherff. ...
Scanning electron microscopy (SEM) was used to study the surface features of the anthoecia (fertile lemma and palea) of Panicum elegans Elias from the Late Cenozoic deposits in Ellis County, Kansas. Examination of the lemma revealed a well developed germination lid, irregularly arranged, simple, rounded papillae and a crescent-shaped scar of attachment. The presence of a germination lid indicates that this structure has been present in some members of the Gramineae since at least the Late Miocene-Early Pliocene. Evidence is presented which contradicts current ideas regarding the distribution of the germination lid in extant Gramineae. The surface of the palea is characterized by simple, rounded papillae spaced in regular rows. The arrangement and form of these papillae are like that present in some modern Dichanthelium. Both the epidermises of the lemma and palea are composed entirely of long cells with strongly sinuous, interlocking cell walls. The pattern of cells on the lemma indicates that the systematic placement of Panicum elegans is correct.
An update of the bibliographic review of the Mexican macromycetes studies made by the author in 1998 is presented. It was found that the mycobiotic studies on macromycetes were barely increased since then, and are still absent in many taxonomic groups. There are around 60 genera, three in ascomycetes and six in basidiomycetes, which have been more or less monographied. The genera Scleroderma and Psilocybe are still the only intensively monographied even at the world level, since 1970 and 1983, respectively. Furthermore these genera have now several additions or supplements in their knowledge in Mexico. The hypogeous fungi yet poorly known in Mexico, have at the present a special interest in the University of Nuevo Leon at Linares, Instituto Tecnologico de Ciudad Victoria and Instituto de Ecologia at Xalapa, under the coordination of the University of Oregon. A new research line in phylogeny based in the molecular biology is developing. It continues the absence of specialists and the fact that the tropical zones are poorly studied, in high contrast with their exuberant diversity and the alarming destruction of their habitats.
We recorded in a tropical dry forest in the northeast of Colombia (Cesar Dept.) 12 species of macrofungi
previously unknown for the country; Amanita aureofloccosa, A. crebresulcata (Amanitaceae), Daedalea
flavida (Fomitopsidaceae), Ganoderma resinaceum (Ganodermataceae), Marasmius cohortalis
(Marasmiaceae), Phellinus merrilli, P. aff. umbrinellus (Hymenochaetaceae), Phlebopus beniensis
(Boletinellaceae), Podoschypha petalodes (Meruliaceae), Psathyrella murrilli (Coprinaceae), Rigidoporus
ulmarius (Meripilaceae) and Trametes socotrana (Polyporaceae). Each species is described, its taxonomic
relationships are discussed, and some observations on its distribution and ecology are provided.
Pholiota highlandensis var. citrinosquamulosa Maire ex Bidaud & Borgarino is a Mediterranean fungus growing in connection above all with Pinus halepensis and/or Quercus ilex, either on soil or on their wood. Its distinguishing characters are stout basidiomata, red-brown pileus with paler, lemon yellow margin, distinct lemon yellow scales on stipe, ellipsoid-ovoid spores and fusiform to lageniform cheilo- and pleurocystidia. Morphological and DNA study of its type and other collections showed that it does not belong to P. highlandensis but is conspecific with Pholiota gallica Holec & Kolařík. This species bears a recently published replacement name for Pholiota lubrica var. obscura, a taxon described by Bon & Chevassut from the same habitats as P. h. var. citrinosquamulosa. Basic data on taxonomy, nomenclature and ecology of P. gallica, the correct name for all the taxa mentioned, are summarized. A key for identification of P. gallica and similar taxa is proposed.
Recently Psathyrella candolleana (Fr.:Fr.) Maire var. candolleana (Fr.) Maire (1913) was gathered from Lainchour, Kathmandu. It is considered as new record for Nepal. The brief description, distribution and the photograph of the species has been included in this paper.Scientific World, Vol. 12, No. 12, September 2014, page 77-78
ResearchGate has not been able to resolve any references for this publication.