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Pluteus horridilamellus S. Ito & S. Imai. A Spores. B Pleurocystidia (metuloids). C Pleurocystidia (thin-walled cystidia). D Cheilocystidia. E Caulocystidia at base. F Pileipellis. Bars A 10 µm; BF 20 µm
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Five species of the genus Pluteus described by S. Ito and S. Imai, and two species of Pluteus described by S. Imai alone, have been revised. Six type specimens of these species are preserved in SAPA, and the author
has confirmed that they belong to the genus Pluteus. Metuloids were observed from P. daidoi and P. horridilamellus. Pluteus daidoi, ha...
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Citations
... In the present article we describe a new species of Pluteus, with brightly coloured basidiomes and a pileipellis as a trichoderm. An extensive literature review (Persoon 1801;Weinmann 1836;Fries 1838;Gillet 1876;Britzelmayr M. 1881;Patouillard 1887;Saccardo 1887;Murrill 1917;Lange 1917;Velenovský 1921, Lange 1936Velenovský 1939, Favre 1948Kühner et Romagnesi 1953, 1956, Orton 1960, 1969Homola 1972;Orton 1986;Vellinga 1990;Lee et al. 1992;Citérin & Eyssartier 1998;Kobayashi 2002;Seok 2005;Illife 2010;Minnis & Sundberg 2010;Justo et al. 2011a, b, c;Malysheva et al. 2016, Ferisin & Dovana 2019Malysheva et al. 2020;Kaygusuz et al. 2021a,b;Ševčíková et al. 2015, 2022 did not reveal any similar species in the Holarctic regions, except for the North American P. aurantipes Minnis, Sundb. & Nelsen (2006: 659). ...
In this article we describe a new species, Pluteus flammans, that is characterised by bright orange-red colours, a villose and translucently striate pileus, and a trichodermal pileipellis. The species is described based on material from Slovakia and Hungary, where it grows on well-decayed angiosperm wood (Quercus spp., Fagus sylvatica, and Tilia sp.). In the phyloge-netic analyses (LSU, ITS and TEF1-α) P. flammans appears as sister to the North American Pluteus aurantipes, which also has brightly coloured basidiomes, however this species differs in the bright red stipe, darker colours of the pileus, slightly larger basidiospores, and shorter caulocystidia. Molecular data supports the recognition of both taxa as separate species, and confirms their placement in Pluteus sect. Celluloderma, despite the fact that P. aurantipes was originally considered to belong to Pluteus sect. Hispidoderma.
... Pluteus machidae S. Ito & S. Imai, originally described from Japan (Ito and Imai 1940) and P. minutissimus Maire, originally described from Spain (Orton 1986) are somewhat close to P. brunneoalbus by their size of basidiomata, color of stipe and size of basidiospores. However, P. machidae differs by a pileus disc which covered with brownish powder, mostly globose to subglobose basidiospores (6-7.5 × 5-6 μm), a hymeniderm pileipellis and the absence of caulocystidia (Ito and Imai 1940;Kobayashi 2002). Pluteus minutissimus is a later synonym of P. podospileus Sacc. ...
Two species of Pluteus, namely P. brunneoalbus and P. sepiicolor, from China are reported and illustrated. Pluteus brunneoalbus is described as a new species in P. sect. Celluloderma. This species is characterized by a shallowly depressed pileus, a white stipe, ellipsoid to broadly ellipsoid basidiospores 6–7 × 5–6.5 μm, the presence of few scattered cheilocystidia, the presence of mostly clavate pleurocystidia, and a cutis type pileipellis. In the phylogenetic analysis based on the internal transcribed spacer region (ITS), the new species appears as sister to P. hirtellus and P. squarrosus. In addition to the new species, another species, P. sepiicolor, is reported here as a new record for China. Molecular data support its conspecificity with a collection from Russia. Detailed morphological descriptions including illustrations of the two species from China, and their comparisons with the related taxa of Pluteus are also provided with phylogenetic placement.
... However, a yellow pileus is an unusual characteristic feature in this group. In our study, no described species with characteristics similar to P. hubregtseorum is known neither from Australia nor New Zealand nor from any other country (Persoon 1801, Saccardo 1887, Dennis 1953, Singer 1956, Singer 1958, Pegler 1977, Vellinga & Schreurs 1985, Orton 1986, Singer 1989, Vellinga 1990, Citérin & Eyssartier 1998, Kobayashi 2002, Illife 2010, Menolli et al. 2010, Minnis & Sundberg 2010, Justo et al. 2011a, Menolli et al. 2015. Morphological and molecular data presented in this study indicate our collections to be a new species and we introduce it in this paper. ...
A new species and its new form, Pluteus hubregtseorum and Pluteus hubregtseorum f. horakianus, are described and illustrated based on material from Australia and New Zealand. Pluteus hubregtseorum is characterized by a squamulose to finely granulose pileus, velutinous at centre and translucently striate at the margin, a pruinose stipe, pileipellis a cutis with transition to a trichoderm, predominantly fusiform to lageniform pleurocystidia and cylindrical to clavate caulocystidia in tufts. Pluteus hubregtseorum f. hubregtseorum has a yellow pileus and a whitish to yellow stipe with distinct floccules, whereas P. hubregtseorum f. horakianus has a brown pileus sometimes darker and radially wrinkled; and a white to cream stipe which becomes tinged yellow-tan or grey-tan near the base with age. The pileipellis structure indicates its placement in the section Hispidoderma, Pluteus plautus group. Multigene phylogenetic analyses of ITS rDNA and EF1-α genes showed Pluteus hubregtseorum is related to P. semibulbosus. Differences of Pluteus hubregtseorum with similar species are also discussed. In addition, Pluteus minor is discussed in detail and as it is not possible to establish a taxon to which it should be unambiguously referred, we reject this dubious name.
... It was similar to P. nanus by its brown pileus with an opaque surface consisting of sphaeropedunculate elements, but differed by a whitish stipe with conspicuous brown floccules and cheilocystidia with brown pigment. To our best knowledge, no species with such characters is known neither from Europe (Orton 1986, Vellinga & Schreurs 1985, Citérin & Eyssartier 1998, Illife 2010 nor other parts of the world (Dennis 1953;Singer 1958;Pegler 1977;Singer 1989;Grgurinovic 1997;Kobayashi 2002;Menolli et al. 2010;Minnis and Sundberg 2010;Justo et al. 2011a, b). Moreover, the ITS rDNA sequence of this fungus appeared to be significantly different from those available in public databases. ...
A new species, Pluteus floccipes, is described and illustrated based on material from the Czech Republic. It is characterised by a dark brown pileus with an opaque surface, a pileipellis in the form of a euhymeniderm, presence of cheilocystidia with brown pigment, and a whitish stipe with brown floccules. The pileipellis structure indicates its placement in section Celluloderma. According to a phylogenetic analysis (ITS rDNA), P. floccipes is closely related to P. nanus, P. cinereofuscus and P. eludens. Morphological differences with similar species are described and discussed. Furthermore, probable synonymy of P. phlebophorus and P. luctuosus was supported by the phylogenetic analysis of Czech collections.
... A modern collection of P. spinulosus from Bolivia appears in the phylogeny as sister to the atromarginatus clade (Fig. 1). The Asian species Pluteus horridilamellus S. Ito & S. Imai (1940: 46) has thick-walled and fusiform-lageniform pleurocystidia, cheilocystidia without apical or lateral hooks, even thick-walled pileocystidia and caulocystidia, and pileipellis without clamp-connections, which are different from those of P. griseodiscus (Kobayashi 2002). Etymology:-the epithet purpureofuscus is from the Latin words of "purpureus" (purple) and "fuscus" (dark colored), making reference to the dark purple color of the pileus. ...
Two new species of Pluteus section Pluteus, P. griseodiscus and P. purpureofuscus, are described from China. Pluteus gris-eodiscus is characterized by the pale basidiomata, non-pigmented lamellar edges, thick-walled cheilocystidia and the presence of caulocystidia. Pluteus purpureofuscus is characterized by a purple-brown pileus, presence of clamp-connections, and growth on coniferous wood. The phylogenetic position of both species is also discussed based on nrITS data.
... When revising herbarium specimens (MICH) we found the same fungus from Florida, USA. As we could not find a suitable comparable species in the extensive literature (Dennis 1953;Singer 1956;Pegler 1977Pegler , 1983Vellinga & Schreurs 1985;Banerjee & Sundberg 1995;Grgurinovic 1997;Citérin & Eyssartier 1998;Kobayashi 2002;Pradeep et al. 2002, Menolli et al. 2010Justo et al. 2011 a, b), it is described here as new species. ...
A new species, Pluteus septocystidiatus, from the Republic of Korea and USA is described, based on morphological and molecular evidence. This new species is remarkable on account of its thick-walled multiseptate pleurocystidia. Its phylogenetic placement inferred from the ITS rDNA nucleotide sequence suggests a close relationship to P. albostipitatus of the salicinus/albostipitatus clade.
... Recently, some new taxonomic studies and distributional records of Pluteus Fr. have been reported from Japan (Takahashi 2001a,b;Kobayashi 2002;Takehashi and Kasuya 2007). However, the fl ora of this genus has not yet been comprehensively studied in this country. ...
Two taxa of the genus Pluteus, i.e., Pluteus magnus and Pluteus podospileus f. podospileus, are newly recorded from Japan. The macroscopic and microscopic features of these two species are described and illustrated.
... reported a large number of agarics, including new taxa, from Hokkaido, Northern Japan. For the genus Pluteus Fr., he described eight species from Hokkaido, and two of those are new, i.e., Pluteus bulbosus Imai and P. macrosporus Imai (Imai 1938;Kobayashi 2002). However, his descriptions are mainly based on macroscopic characters and without detailed description of microscopic features. ...
Pluteus chrysophaeus is described as a new record for Japanese mycobiota. Pluteus leoninus, reported for the first time from Japan by Imai (1938), probably represents P. chrysophaeus. The new Japanese specimens of P. leoninus is redescribed and illustrated.
ALFREDO VIZZINI, LUIGI PERRONE, TOMASO LEZZI, MAURO CITTADINI, ENRICO ERCOLE
SEGNALAZIONE DI PLUTEUS MULTIFORMIS (AGARICALES, PLUTEACEAE) PER IL LAZIO E PRIMA RACCOLTA CONFERMATA MOLECOLARMENTE PER L'ITALIA
Riassunto Vieni qui riportata la prima raccolta italiana (Lazio) di Pluteus multiformis corredata da una descrizione macroscopica e microscopica e relativa analisi molecolare filogenetica. La specie, appartenente a Pluteus sezione Celluloderma, è stata finora segnalata in Spagna e Turchia. Considerando le sequenze ambientali ITS (ottenute da campioni di suolo) presenti nei database pubblici GenBank ed UNITE, la specie parrebbe essere presente anche in Sardegna, Sicilia ed Estonia. I caratteri microscopici distintivi di P. multiformis sono l'estrema variabilità nella forma degli elementi della pileipellis, la rarità dei pleurocistidi e la presenza di cheilo-e caulocistidi clavati, questi ultimi poco organizzati in ciuffi e quindi non formanti flocculi. Il pileo, striato al margine, di colore bruno scuro al centro e più chiaro al margine (con sfumature olivastre nelle raccolte turche), è rugoso-grinzoso-venoso al disco, le lamelle possiedono un filo brunastro (assente o non visibile nella raccolta italiana), lo stipite è bianco-grigiastro, liscio e la crescita è apparentemente terricola (su radici morte nella raccolta italiana), generalmente in aree termofile mediterranee. Abstract The first Italian collection (Lazio) of Pluteus multiformis is reported here, accompanied by a macroscopic and microscopic description and related molecular phylogenetic analysis. The species, belonging to Pluteus section Celluloderma, has so far been reported in Spain and Turkey. Considering the ITS environmental sequences (obtained from soil samples) present in the public GenBank and UNITE databases, the species appears to also be present in Sardinia, Sicily, and Estonia. The distinctive microscopic characteristics of P. multiformis are the extreme variability in the shape of the elements of the pileipellis, the rarity of the pleurocystidia, and the presence of clavate cheilo-and caulocystidia, the latter poorly organized into tufts and therefore not forming flocs. The pileus, striated at the margin, dark brown in the center and lighter at the margin (with olive shades in the Turkish collections), is rugose-venose on the disc, the lamellae have a brownish edge (absent or not visible in the Italian collection), the stipe is greyish-white, smooth and the growth is apparently terrestrial (on dead roots in the Italian collection), usually in Mediterranean thermophilous areas. Introduzione Il genere Pluteus Fr., tipificato con P. cervinus (Schaeff.) P. Kumm., comprende specie con basidioma eterogeneo, generalmente gimnocarpico (per le poche specie velate vedi Walker libere, sporata rosa, trama lamellare inversa, spore lisce, non amiloidi, cianofile, da globose ad ellittiche, presenza di cistidi imeniali (cheilocistidi, spesso accompagnati da pleurocistidi), pileipellis di struttura variabile (cutis, tricoderma, imeniderma/epitelio) e crescita saprotrofa, per lo più lignicola, raramente terricola
Specimens including the holotype of Pluteus atrofuscens, a morphologically poorly known species reported from Japan, are examined, and it is newly defined as the third species belonging to the section Villosi. This species is described with the aid of line drawings showing the microscopic characteristics.
