New genera, species, and combinations of Boletaceae from Brazil and Guyana

Magnago, Altielys Casale; Alves-Silva, Genivaldo; Henkel, Terry W.; Silveira, Rosa Mara Borges da

doi:10.1080/00275514.2022.2037307

Cited by 15 publications

(12 citation statements)

References 77 publications

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“…and it is known only from the type locality in the Brazilian Atlantic Forest on Florianópolis Island. 74 Different from B. olivaceoflavidus , Brasilioporus simoniarum have distinguished purplish black basidiomata, fibrillose to squamulose pileus, whitish hymenophore mottled orange-red and gradually turning black and subreticulate/sublacunose stipe. A beautiful, although discreet, species associated with restinga is Nevesoporus nigrostipitatus (MycoBank MB838704) ( Figure 3j ), characterized by the small, basidiomata, with pinkish brown velvety pileus, pinkish tubes that are slightly depressed around the stipe and unchanging where bruised, and slender, dark gray to blackish stipe.…”

Section: Resultsmentioning

confidence: 96%

“…Species of Entoloma , Gymnopus , Hydropus , and Phlebopus have been mentioned as ectomycorrhizal, 12 possibly associated with Myrtaceae , Leguminosae , Rubiaceae , Polygonaceae , and Euphorbiaceae in the restinga. 71 – 74 These putative ectomycorrhizal lineages, however, are not concentrated in specific clades neither form monophyletic groups of ectomycorrhizal isolates, 12 in such a way that their true ectomycorrhizal status must be confirmed. The genus Boletus is not recorded from Brazil (except from exotic plantations) but several Tylopilus , Xerocomus and Phlebopus species were originally deposited under the name Boletus sp.…”

Section: Resultsmentioning

confidence: 99%

“… 74 Brasilioporus olivaceoflavidus (MycoBank MB836726) ( Figure 3h ), the type species of the genus, was collected in the coastal Atlantic Forest of the state of Espírito Santo, but it has also been recorded for the state of Santa Catarina, in restinga fragments. 74 This species has tiny basidiomata, a pileus with fibrils and olive-green scales on a yellowish background, and a blackish hymenophore when injured. It grows solitary and in small groups, or gregarious on sandy soil in the vicinity of ectomycorrhizal Coccoloba, Guapira , and Pisonia species.…”

Section: Resultsmentioning

confidence: 99%

“…11,103,104 It is known that over the years and with the expansion of molecular phylogenetic analyzes of Boletaceae, the family has undergone several re-circumscriptions, with the rescue of some taxa and the segregation of others, 105,106 as in the case of the two newly proposed genera, Brasilioporus and Nevesoporus. 74 Brasilioporus olivaceoflavidus (MycoBank MB836726) (Figure 3h), the type species of the genus, was collected in the coastal Atlantic Forest of the state of Espírito Santo, but it has also been recorded for the state of Santa Catarina, in restinga fragments. 74 This species has tiny basidiomata, a pileus with fibrils and olive-green scales on a yellowish background, and a blackish hymenophore when injured.…”

Section: Restinga Mycohighlightsmentioning

confidence: 99%

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Restinga ectomycorrhizae: a work in progress

et al. 2023

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Background: The Brazilian Atlantic Forest is one of the most biodiverse terrestrial ecoregions of the world. Among its constituents, restinga vegetation makes a particular case, acting as a buffer zone between the oceans and the forest. Covering some 80% of Brazilian coastline (over 7,300 km in length), restinga is a harsh environment where plants and fungi interact in complex ways that just now are beginning to be unveiled. Ectomycorrhizal symbiosis, in particular, plays a so far ungauged and likely underestimated role. We recently described the morpho-anatomical and molecular features of the ectomycorrhizae formed by several basidiomycetous mycobionts on the host plant Guapira opposita, but the mycorrhizal biology of restinga is still largely unexplored. Here, we report new data on the ectomycorrhizal fungal symbionts of G. opposita, based on the collection of sporomata and ectomycorrhizal root tips in restinga stands occurring in southern Brazil. Methods: To obtain a broader view of restinga mycorrhizal and ecological potential, we compiled a comprehensive and up-to-date checklist of fungal species reported or supposed to establish ectomycorrhizae on restinga-inhabiting host plants, mainly on the basis of field observations. Results: Our list comprises some 726 records, 74 of which correspond to putative ectomycorrhizal taxa specifically associated with restinga. These include several members of Boletaceae, Amanita, Tomentella/Thelephora, Russula/Lactifluus, and Clavulina, as well as hypogeous fungi, like the recently described Longistriata flava. Conclusions: Our survey reveals a significant diversity of the restinga ectomycorrhizal mycobiota, indicating the importance of this symbiosis for the ecological functioning of a unique yet poorly known and threatened ecosystem.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Restinga Mycohighlightsmentioning

confidence: 99%

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Restinga ectomycorrhizae: a work in progress

et al. 2023

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“…We subsequently built a phylogenetic tree using specimens with at least two of the above four DNA fragments. Species delimitation in Boletales was based on the following criteria: 1) undelimited phylogenetic species were determined with a < 97% DNA sequence identity threshold between sibling species, 2) well-studied taxa were based on previous taxonomic and phylogenetic publications (Binder & Hibbett, 2006;Binder et al, 2010;Halling et al, 2012;Wilson et al, 2012;Nuhn et al, 2013;Halling et al, 2015;Henkel et al, 2016;Wu et al, 2016a;Wu et al, 2016b;Zeng et al, 2016;Zeng et al, 2017;Zeng et al, 2018;Chai et al, 2019;Kuo & Ortiz-Santana, 2020;Li & Yang, 2021;Magnago et al, 2022). During the determination, a small proportion of those known species had genetic variation of less than 3% between sister species.…”

Section: Species Determination For Phylogenetic Analysesmentioning

confidence: 99%

The rapid diversification of Boletales is linked to Early Eocene and Mid-Miocene Climatic Optima

Wu,

Halling

et al. 2023

Preprint

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Investigating the mechanisms that underpin the diversity and distribution patterns of species is fundamental in ecology and evolution. However, the study of fungi, particularly the ectomycorrhizal group, has been relatively constrained in this field. We conducted a high-resolution phylogenomic analysis of Boletales, an ecologically and economically significant group of fungi, covering 83 genera across 15 families. We subsequently investigated its evolutionary history using sequences at four genes obtained from 984 species across 121 genera within 15 families. The findings unveiled that Boletales likely originated in Early Jurassic and underwent two remarkable episodes of rapid diversification, commencing in early Eocene (~54 Mya) and early Miocene (~17 Mya) epochs. The notable surges were predominantly driven by ectomycorrhizal clades, with a specific emphasis on East Asia and North America. These expansions were strongly correlated with the warm-humid paleoclimates during the Early Eocene Climatic Optimum and Mid-Miocene Climatic Optimum, as well as the rapid expansion of Fagales and Pinaceae hosts. This study provides novel insights into the spatiotemporal evolution of fungi, highlighting the synergistic impact of abiotic factors, such as warm and humid paleoclimates, and the biotic factor of rapid diversification of host plants on the fungal diversification.

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Coccoloba-associated xerocomoid boletes (Boletaceae) from the Caribbean and Mexico: Tropicoboletus ruborculus gen. et comb. nov., revision of Xerocomus coccolobae, phylogenetic assessment of Singerocomus guadelupae comb. nov., and type studies of Xerocomus caeruleonigrescens, X. cuneipes, and X. pseudoboletinus var. pini-caribaeae

Gelardi¹,

Angelini²,

Biketova

et al. 2023

Mycol Progress

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Only two Coccoloba-associated xerocomoid boletes with smooth basidiospores are currently known from the Dominican Republic, namely Boletus ruborculus and Xerocomus coccolobae. A multilocus phylogenetic analysis of four gene markers (ITS, LSU, RPB2, TEF1) reveals that B. ruborculus forms an autonomous clade in the Boletaceae corresponding to a novel genus, which is introduced here as Tropicoboletus gen. nov., whereas X. coccolobae is confirmed as a member of Xerocomus s. str. Tropicoboletus is sister to subfamily Xerocomoideae in the combined RPB2/TEF1 Boletaceae-wide analysis. Accurate morphological descriptions of the two species based on well-annotated samples are provided, accompanied by color photographs of fresh specimens in habitat and line drawings of their main anatomical features. The holotype collections of B. ruborculus and X. coccolobae were successfully sequenced and re-examined anatomically. The distribution range of Tropicoboletus ruborculus comb. nov. is extended from the original locality in Puerto Rico to the Dominican Republic and Mexico where its presence is reported for the first time. Similarly, the Dominican collections of X. coccolobae represent the first documented occurrence of this species for the Island of Hispaniola. Based on molecular and morphological evidence, we conclude that the Belizean species Xerocomus olivaceus is conspecific with X. coccolobae and is therefore reduced into synonymy. In addition, the holotypes of Xerocomus caeruleonigrescens, Xerocomus cuneipes, and Xerocomus pseudoboletinus var. pini-caribaeae were microscopically re-studied, although their exact taxonomic placement remains unresolved in the absence of any phylogenetic inference. Molecular investigation of a paratype of Boletus guadelupae resulted in a conspecificity with the recently described Singerocomus atlanticus from Brazil, extending the biogeographic coverage of Singerocomus to the Caribbean. Accordingly, the new combination Singerocomus guadelupae is proposed and S. atlanticus is synonymized. Finally, a putative novel Xerocomus s. str. species is discovered from the Dominican Republic but not formally described for the time being due to the paucity of material available.

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New genera, species, and combinations of Boletaceae from Brazil and Guyana

Cited by 15 publications

References 77 publications

Restinga ectomycorrhizae: a work in progress

Restinga ectomycorrhizae: a work in progress

The rapid diversification of Boletales is linked to Early Eocene and Mid-Miocene Climatic Optima

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