Paxilloboletus gen. nov., a new lamellate bolete genus from tropical Africa

Badou, Sylvestre A.; Furneaux, Brendan; Kesel, André De; Khan, Faheema Kalsoom; Houdanon, Roël D.; Ryberg, Martin; Yorou, Nourou S.

doi:10.1007/s11557-021-01756-y

Cited by 6 publications

(7 citation statements)

References 48 publications

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“…The Central African endemic Boletus alliaceus was recovered here as a sister taxon to Boletus s. str., and a similar relationship was found for the recently described Paxilloboletus africanus (Badou et al 2022). Furthermore, we estimated the origin of Boletus s. str to be 40 mya, which may indicate why the sister lineages to Boletus s. str.…”

Section: Discussionsupporting

confidence: 88%

“…A prominent consequence of this lack of phylogenetic resolution is the recent explosion of new generic names to accommodate newly discovered species, or species that are included in molecular phylogenetic analyses for the first time and recovered on long branches with no supported affinity to existing named genera (e.g., Castellano et al 2016; Henkel et al 2016; Badou et al 2022; Halling et al 2023). Few of these studies have followed recommended best practices for naming new genera (Vellinga et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…One of the most prominent consequences of this lack of phylogenetic resolution is the recent explosion of new generic names to accommodate newly discovered species, or species that are included in molecular phylogenetic analyses for the first time and that are recovered on long branches with no supported affinity to existing generic names (e.g., Castellano et al 2016; Henkel et al 2016; Badou et al 2022; Halling et al 2023). Although this is a predictable pattern for evolutionary radiations, it has resulted in a recent proliferation of new genera, many of which are monotypic or require identification of species to recognize, an impractical solution to the problem.…”

Section: Introductionmentioning

confidence: 99%

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Phylogenomics, biogeography, and trait evolution of the Boletaceae (Boletales, Agaricomycetes, Basidiomycota)

Tremble,

Henkel,

Bradshaw

et al. 2023

Preprint

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The species-rich porcini mushroom family Boletaceae is a widespread and well-known group of ectomycorrhizal (ECM) mushroom-forming fungi that has eluded intrafamilial phylogenetic resolution despite many attempts using morphological traits and multi-locus molecular datasets. In this study, we present a genome-wide molecular dataset of 1764 single-copy gene families from a global sampling of 418 Boletaceae specimens. The resulting phylogenetic analysis has strong statistical support for most branches of the tree, including the first statistically robust backbone. The enigmatic Phylloboletellus chloephorus from non-ECM subtropical forests in northwestern Argentina is recovered as an early diverging lineage within the Boletaceae. Time-calibrated branch lengths estimate that the family first arose in the early-to-mid Cretaceous and underwent a rapid radiation in the Eocene, possibly when the ECM nutritional mode arose with the emergence and diversification of ECM angiosperms. Biogeographic reconstructions reveal a complex history of vicariance and episodic long-distance dispersal correlated with historical geologic events, including Gondwanan origins and cladogenesis patterns that parallel its fragmentation. Ancestral state reconstruction of morphological traits predicts that the ancestor of the Boletaceae was lamellate with ornamented basidiospores, contrary to the most common bolete sporocarp morphology. Transition rates indicate that the lamellate hymenophore and sequestrate sporocarp are reversible traits. Together, this study represents the most comprehensively sampled, data-rich molecular phylogeny of the Boletaceae to date, enabling robust inferences of trait evolution and biogeography in the group.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phylogenomics, biogeography, and trait evolution of the Boletaceae (Boletales, Agaricomycetes, Basidiomycota)

Tremble,

Henkel,

Bradshaw

et al. 2023

Preprint

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“…However, the order in the ML tree was Chalciporoideae, Pseudoboletus, Zangioideae, Leccinoideae, Xerocomoideae, Austroboletoideae, Pulveroboletus group, and Boletoideae, and Baorangia clade was embed in Pulveroboletus group. In view of our results and combined with phylogenetic analyses of Zhao et al (2014b), Badou et al (2022), andVadthanarat et al (2022), the positions of the several major clades are still unstable. Phylogenetic relationships of Phylloporus in the genus inferred from multi-locus (ITS, 28S, and tef1-α) using maximum likelihood method and Bayesian inference (only the ML tree was shown).…”

Section: Discussionmentioning

confidence: 83%

“…Although remarkable results on the taxonomy of boletes were obtained in the past ( Li et al, 2011 ; Zeng et al, 2014 ; Zhao et al, 2014a , b ; Gelardi et al, 2015a , b ; Zhu et al, 2015 ; Wu et al, 2016b ; Chen et al, 2019 ; Vadthanarat et al, 2019 ; Hosen and Yang, 2021 ; Ayala-Vásquez et al, 2022 ; Badou et al, 2022 ; Biketova et al, 2022 ), the additions of more new taxa are necessary to reconstruct a high-resolution tree of Boletaceae. More intensive collection are needed to analyze the species diversity of Boletaceae in China.…”

Section: Introductionmentioning

confidence: 99%

Boletaceae in China: Taxonomy and phylogeny reveal a new genus, two new species, and a new record

Wang

Wang²,

Dai³

et al. 2023

Front. Microbiol.

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Boletaceae, the largest family in Boletales, has been attracted by mycologists in the world due to its diverse morphology and complex history of evolution. Although considerable work has been done in the past decades, novel taxa are continually described. The current study aimed to introduce three new taxa and one new record of Boletaceae from China. The morphological descriptions, color photographs, phylogenetic trees to show the positions of the taxa, and comparisons with allied taxa are provided. The new genus Hemilanmaoa is unique in the Pulveroboletus group, and Hemilanmaoa retistipitatus was introduced as the type species. It can be distinguished by its bluing basidioma when injured, a decurrent hymenophore, a stipe covered with distinct reticulations, and a fertile stipitipellis. Porphyrellus pseudocyaneotinctus is characterized by its pileipellis consisting of broadly concatenated cells and thin-walled caulocystidia in Porphyrellus. In Phylloporus, Phylloporus biyangensis can be distinguished by its hymenophores that change to blue when injured and yellow basal mycelium. Lanmaoa angustispora, as a new record, is first reported in Northern China. Internal transcribed spacer (ITS), 28S rDNA (28S), translation elongation factor 1-alpha (tef1-α), RNA polymerase II subunit 1 (rpb1), and RNA polymerase II subunit 2 (rpb2) were employed to execute phylogenetic analyses.

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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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Paxilloboletus gen. nov., a new lamellate bolete genus from tropical Africa

Cited by 6 publications

References 48 publications

Phylogenomics, biogeography, and trait evolution of the Boletaceae (Boletales, Agaricomycetes, Basidiomycota)

Phylogenomics, biogeography, and trait evolution of the Boletaceae (Boletales, Agaricomycetes, Basidiomycota)

Boletaceae in China: Taxonomy and phylogeny reveal a new genus, two new species, and a new record

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