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Hawaiian Rhodocollybia and Gymnopus species. 1-2. RhodocoUybia laulaha (DEH 068). 1. Basidiomes. 2. Closeup of laybrinthine lamellae with a circumsessile constriction. 3. Gymnpus luxuans (DEH 418). 4. Gymnopus subpruinosus (DED 6142). 5-6. Gymnopus menehune (DED 5866 & DEH 270, respectively). Scale bars = 10 mm.

Hawaiian Rhodocollybia and Gymnopus species. 1-2. RhodocoUybia laulaha (DEH 068). 1. Basidiomes. 2. Closeup of laybrinthine lamellae with a circumsessile constriction. 3. Gymnpus luxuans (DEH 418). 4. Gymnopus subpruinosus (DED 6142). 5-6. Gymnopus menehune (DED 5866 & DEH 270, respectively). Scale bars = 10 mm.

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Four species of Collybia sensu late are reported from the Hawaiian Islands: Rhodocollybia laulaha and Gymnopus menehune represent new species, while G. luxurains and G. subpruinosus are first reports. All four Hawaiian taxa are fully described, illustrated and compared with allied taxa. Marasmius subpruinosus, M. subcyathiformis and Clitocybe colly...

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... Remarks.-Collybiopsis subpruinosa is characterized by relatively small basidiomes with plane-convex, rugulose striate, brown pileus, adnate to adnexed, beige lamellae, and a pubescent to tomentose stipe, with a pallid apex and greyish brown toward the base, and strigose basal mycelium; 6.4-8.2 (-9.3) × 3.9-5 (-5.4) µm basidiospores, versiform cheilocystidia, and pileocystidia often in chains of 2-3 cells (Desjardin et al., 1999;Martínez & Lechner, 2021). The Mexican collections agree well with C. subpruinosa; however, presented smaller cheilocystidia and pileocystidia than those cited (cheilocystidia 25-80 × 5-16 µm, pileocystidia 15-80 × 5-12 µm) by Desjardin et al. (1999). ...
... subpruinosa is characterized by relatively small basidiomes with plane-convex, rugulose striate, brown pileus, adnate to adnexed, beige lamellae, and a pubescent to tomentose stipe, with a pallid apex and greyish brown toward the base, and strigose basal mycelium; 6.4-8.2 (-9.3) × 3.9-5 (-5.4) µm basidiospores, versiform cheilocystidia, and pileocystidia often in chains of 2-3 cells (Desjardin et al., 1999;Martínez & Lechner, 2021). The Mexican collections agree well with C. subpruinosa; however, presented smaller cheilocystidia and pileocystidia than those cited (cheilocystidia 25-80 × 5-16 µm, pileocystidia 15-80 × 5-12 µm) by Desjardin et al. (1999). ...
... In the ITS phylogeny (Fig. 7), the Mexican sequence resulted in a well-supported clade (100% ML-BS, 1.00 PP, 98% MP-BS) with other samples of the same taxon from India, Madeira, and the USA. This species has a wide distribution, it has been recorded from Argentina, Brazil, Costa Rica, Ecuador, Hawaii, Jamaica, Madeira, New Zealand, Panama, Puerto Rico, and the USA, growing in hardwood litter (Desjardin et al., 1999;Song et al., 2019;Martínez & Lechner, 2021). This is the first mention of the species for the country, from Veracruz state. ...
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... Collybiopsis is morphologically similar and phylogenetically close to Gymnopus (Desjardin et al. 1999;Mata 2002;Dutta et al. 2015). Both genera are reported to be distinguishable through like types of the terminal element of pileipellis, attachment of lamellae, the character of stipe, basidiospores, and cheilocystidia. ...
... Collybiopsis menehune can be distinguished from Co. clavicystidiata by its larger pileus (8-30 mm), buff lamellae, longer stipe (15-60 mm), longer basidiospores (7.5-9.5 × 3.5-4.2 μm, Q = 2.2), and longer caulocystidia (16-67 × 3-5 μm) (Desjardin et al. 1999). Co. clavicystidiata is phylogenetically close to Co. pseudomphalodes. ...
... Collybiopsis menehune has a longer stipe (15-60 mm length), denser lamellae, and larger basidiospores (7.5-9.5 × 3.5-4.2 μm) (Desjardin et al. 1999). Collybiopsis ramealis has a smaller basidiocarp (2-20 mm), shorter basidiospores (7.8-11 × 2.5-4 mm) and different type of pileipellis (Rameales-structure) (Noordeloos 1983;Desjardin et al. 1997). ...
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... This island is one of the hotspots for biodiversity, especially for plants (Condé et al. 2002), but the expanding agricultural industry and tourism had a major impact on original biodiversity. In other continents, M. subpruinosus has been collected scattered to clustered on humusrich soils, woody debris, and logs, on partially buried wood debris, on wood debris and twigs, scattered on wood debris and mulch (Desjardin et al. 1999, Mata & Ovrebo 2009), and on Cyathea, Nothofagus truncata, Pinus pinaster, Pinus sp., and Podocarpus totara in forests and parks (Anonymous 2012(Anonymous -2018; fruiting occurs in late summer in watered areas and after fall rains (http://www. mykoweb.com/CAF/species/Gymnopus_subpruinosus.html). ...
... D i s t r i b u t i o n . -Marasmiellus subpruinosus is known from the western part of the USA (including Puerto Rico and Hawaii; Baroni 1998, Desjardin et al. 1999, Barron 2012, Central America (Costa Rica, Jamaica, Panama; Pennington 1915, Ovrebo 1996, Mata & Ovrebo 2009), South America (Brazil, Ecuador; Rosa & Capelari 2009, Anonymous 2017, and New Zealand (Anonymous 2012(Anonymous -2018. ...
... μm], fusoid, fusoid-ellipsoid, rarely subovoid basidiospores; variable, clavate, (sub)cylindrical, (sub)fusoid, utriform cheilocystidia, mostly irregular to branched, with projection(s) or rostrate; the absence of pleurocystidia; and mostly cylindrical, fusoid, narrowly clavate, (sub)utriform, irregular, (sub)moniliform caulocystidia. Desjardin et al. (1999) mentioned this species from the Hawaiian Islands; their description differs from the Madeira basidiomata by larger cheilocystidia (25-80 × 5-16 μm) and caulocystidia (60-120 × 2.5-10 μm). However, the shapes of all above-mentioned structures agree with the Madeira collections; Desjardin et al. (1999) A. Perry, described from São Tomé, Africa, has a paler pileus, pale brownish grey to cream centre, or beige to cream overall, close lamellae, smaller basidiospores (6.4-7.0 × 3.0-3.5 μm), and a pileipellis with undifferentiated terminal cells (Desjardin & Perry 2017). ...
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... gombasz.hu/fajlistank.php?action=showKind&langOrder=hu&caller=kindList&kin dId=1557); z Ameriky z USA (Peck 1897, Halling 1983) a Dominikánské republiky (Mata et al. 2006); z Afriky z Beninu (Antonín et Noordeloos 2010) a z Asie z Jižní Koreje (Antonín et Noordeloos 2010). Sběry z Havajských ostrovů (Desjardin et al. 1999) mohou představovat jiný druh (Mata et al. 2006). Plodnice ze severněji polo žených zemí pocházejí často ze skleníků (viz přehled lokalit Antonín et Noordeloos 2010 -CD s doplňujícími informacemi). ...
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Hana Ševčíková: Record of the rare Marasmiellus luxuriansin the Wallachian region and notes on its variability The article summarizes the distribution of the rare species Marasmiellus luxurians in the Czech Republic, including a new find from Valašské Meziříčí (Moravian Wallachia region). This species is currently known from 15 localities in the Czech Republic, of which only 10 are outside greenhouses. The taxonomy of this species is mentioned. The variability of the colour and character of the pileus is discussed. Dark brown and rimose pilei were noticed in Wallachian basidiomata, although brown­red, smooth pilei are more frequently found in the Czech Republic. In some revised greenhouse collections double lamellar edges have been found, which is likely to be associated with wet weather conditions. The medallion­type clamp connections, which are rare or missing in many other collections, have been found in the collection from Valašské Meziříčí. The ecology of Marasmiellus luxurians known from the literature, and the growth on mulch bark and other wood residues in warm summer months in Europe were confirmed. Varieties of this species and similar European species are mentioned. V článku jsou shrnuty nálezy vzácné penízovky nádherné– Marasmiellus luxurians – z České republiky včetně nového nálezu z Valašského Meziříčí. Penízovka nádherná je v současné době známá z 15 lokalit v České republice, z toho pouze 10 nálezů je mimo skleníky. Je zmíněna taxonomie druhu a diskutována barva a charakter klobouku, který byl u plodnic zValašska tmavohnědý a rozpraskaný, ačkoliv častěji jsou v České republice nacházeny plodnice světlejší, hnědočervené, nerozpraskané. U některých revidovaných sběrů zvlhčích skleníků bylo ověřeno dvojité ostří lupenů, které se patrně pojí se zvýšenou vlhkostí vzduchu. V pokožce klobouku plodnic z Valašska byly nalezeny nápadné přezky typu medailon, které u některých jiných sběrů chybí nebo jsou vzácné. Je potvrzena ekologie druhu známá zliteratury, tedy růst na mulčovací kůře a jiných dřevních zbytcích, v Evropě růst vteplých letních měsících. Jsou zmíněny variety penízovky nádherné ají příbuzné druhy.
... Species of Rhodocollybia are characterized by rather large and fleshy basidiocarps with a convex pileus, somewhat serrated lamella edges when young, a striate and often longitudinally twisted stipe, a pink to pale pinkish white spore print, typically dextrinoid (at times only a portion of the spore deposits) and cyanophilous basidiospores, and a cutis-or an ixocutis-type pileipellis (Lennox 1979;Mata et al. 2004;Wilson & Desjardin 2005). Species of this genus are widely distributed throughout the temperate regions of Europe and North America and the montane regions of Central America and also from a few tropical regions (Desjardin et al. 1999;Wilson & Desjardin 2005;Keirle et al. 2010;Mata et al. 2016). Traditionally, the genus has been placed in the family Tricholomataceae (Singer 1939(Singer , 1951(Singer , 1962(Singer , 1986. ...
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... Gymnopus menehune, described from Hawaii, differs in a darker brown pileus, larger basidiospores (7.5-9.5  3.5-4.2 µm), cylindrical-lobed cheilocystidia, and nodulose pileipellis terminal cells ( Desjardin et al. 1999). Gymnopus johnstonii, described from Puerto Rico, has a darker brown pileus, distant and broader lamellae (2-3 mm), larger basidiospores (8-10  3-5 µm), shorter cheilocystidia (-35 µm long), and more strongly brown-incrusted pileipellis hyphae ( Dennis 1951, Pegler 1983). ...
... Gymnopus johnstonii, described from Puerto Rico, has a darker brown pileus, distant and broader lamellae (2-3 mm), larger basidiospores (8-10  3-5 µm), shorter cheilocystidia (-35 µm long), and more strongly brown-incrusted pileipellis hyphae ( Dennis 1951, Pegler 1983). Gymnopus subpruinosus has a darker brown to greyish brown pileus, distant and broader lamellae (1-4 mm), a paler stipe with greyish orange apex, larger basidiospores (8-10  4.55.2 µm), and conspicuous pileocystidia for which the species is named ( Desjardin et al. 1999). Basidiomes of Gymnopus rodhallii look very similar to those of G. omphalodes reported from Trinidad by Dennis (1951; Pl. ...
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... Another phenotypically similar species, Gymnopus subcyathiformis (Murrill) Desjardin, Halling & Hemmes (synonym: Collybia subcyathiformis), is reported from Mexico, tropical America, Trinidad, East Africa, etc. This species differs by the presence of a strongly sulcate striate pileus, slight interveined lamellae towards the margin, lamellar edge with tufts of filiform cheilocystidia and by the absence of diverticulate branches of pileipellis hyphae (Pegler 1977;Desjardin et al. 1999). Gymnopus collybioides (Speg.) ...
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A total of 118 fungal specimens were collected from Mt. Manggyeong, Chungnam province, Korea between July and October 2014. All specimens were identified to the species level using a combination of morphological characteristics and DNA sequencing. Out of 118 specimens, eight species, Amanita manginiana, A. pilosella, Calvatia holothurioides, Cantharellus tabernensis, Dicephalospora rufocornea, Gymnopus menehune, Marasmius brunneospermus, and Russula cerolens, have not been previously reported in Korea.
... It is characterized by brown or reddish brown convex pileus, slightly umbonate with striate margin, oblong to ellipsoid basidiospores, and cylindrical caulocystidia. It is frequently collected on woody debris across the continental United States and has been reported from Europe (Breitenbach & Kränzlin 1991), Hawaii (Desjardin et al. 1999), Dominican Republic (Mata et al. 2006), Costa Rica, and Panama (Mata & Ovrebo 2009). Gymnopus luxurians represents a new record for Pakistan. ...
... µm, cylindrical, parallel, thin-walled, hyaline Comments: Gymnopus menehune is diagnosed by its convex to plano-convex, umbilicate pileus, pubescent to tomentose stipe, and elongate to ellipsoid basidiospores. According to Desjardin et al. (1999) there are voluminous lobed cheilocystidia in G. menehune, but cheilocystidia were rarely observed in our Pakistan collection. The species was described first from Hawaii (Desjardin et al. 1999) and later from Indonesia (Wilson et al. 2004). ...
... According to Desjardin et al. (1999) there are voluminous lobed cheilocystidia in G. menehune, but cheilocystidia were rarely observed in our Pakistan collection. The species was described first from Hawaii (Desjardin et al. 1999) and later from Indonesia (Wilson et al. 2004). Gymnopus menehune represents a new record for Pakistan. ...
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... A phylogenetic reconstruction using nLSU data placed Rhodocollybia laulaha in the monophyletic clade containing other Rhodocollybia species from the New World (Wilson & Desjardin 2005). Support for the populations of R. laulaha belonging to a single species endemic to the Hawaiian Islands was based solely on its morphological distinctiveness and its reliable association with endemic Hawaiian rain forest vegetation (Desjardin et al. 1999). Understanding of the role of long distance spore dispersal in the maintenance of fungal species cohesion is in its infancy. ...
... Detailed examination of the protologues for R. lignitilis and R. laulaha indicates that the macromorphological and micromorphological features of the two are consistent and overlapping (cf. Desjardin et al., 1999 andMata et al., 2004). As there are no fixed substitutions in the ITS of R. lignitilis that would permit reliable genetic differentiation between the two, it seems safe to declare them conspecific with the name R. laulaha having priority. ...
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The Hawaiian mushroom Rhodocollybia laulaha was selected as a model to investigate patterns of gene flow between geographically isolated fungal populations from ecologically and bioclimatically varied sites. Its morphology (distinctive when compared to other members of the genus) and affinity for endemic Hawaiian forest suggested that it was endemic to Hawaii. However, speculation as to its closest non-Hawaiian relative and its overall placement within the genus was based on mostly anecdotal evidence. The present morphological and genetic research identifies a well-supported clade comprising R. laulaha individuals from across the Hawaiian Islands, reveals R. lignitilis (described in 2004 from the Neotropics) to be conspecific with R. laulaha, and identifies R. unakensis from Texas as a putative sister taxon. Different possible historical scenarios are discussed regarding the migration and establishment of R laulaha ancestors between the Americas and Hawaii. Rhodocollybia lignitilis is synonymized with R. laulaha, and Marasmius clavipes is transferred to Rhodocollybia.