Pulchroboletus

Fungalpedia – Note 422, Pulchroboletus

 

Pulchroboletus Gelardi, Vizzini & Simonini

Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Macrofungi.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1 

Classification: Boletaceae, Boletales, Agaricomycetidae, Agaricomycetes, Agaricomycotina, Basidiomycota, Fungi.

Alessioporus was introduced by Gelardi et al. (2014), based on morphological, macro-chemical reactions (25% NH₄OH, 30% KOH, FeSO₄), and molecular (ITS, LSU, tef-1 α) studies with Pulchroboletus roseoalbidus as a type species. Alessioporus is distinguished from the genus due to its pastel pink, cream-pinkish to whitish pink or rarely bloodred pileus surface, the smooth to densely punctuate stipe surface, also with a coarse reticulum (rarely); the pseudo-annulus is usually located in the upper or middle part of the stipe, the pinkish lilac context of the pileus, and distinct sequences (ITS, LSU, and tef-1α) (Gelardi et al. 2004). Farid et al. (2017) suggested placing Boletus rubricitrinus, into genus Pulchroboletus. Similarly, in a recent study, Ayala-Vásquez et al. (2023) reclassified Boletus neoregius as P. neoregius based on morphological and multigene phylogenetic analyses (ITS and LSU of 17 accessions), increasing the current understanding of this genus. The holotype of P. neoregius and B. neoregius has been recorded to be a deep red or pink to brown pileus, while the revised species varied in color of the pileus brown. In addition, with physical touch, the color changes from dark red to red-brown. Another interesting point is that the consumability of P. neoregius has also been recorded, with evidence from the Tlahuica-Pjiekakjoo culture, Mexico (Ayala-Vásquez et al. 2023). Therefore, five species have been accepted in Pulchroboletus.

Type species: Pulchroboletus roseoalbidus (Alessio & Littini) Gelardi, Vizzini & Simonini 

Other accepted species: Species Fungorum – search Pulchroboletus

Figure 1 – Pulchroboletus roseoalbidus (MG416a). a Basidioma. b Stipitipellis and lateral stipe stratum. c Pileipellis. d Cheilo- and pleurocystidia. e Basidia. f Spores. Scale bars: a = 1 cm, b, d = 20 μm, c = 30 μm, e, f = 15 μm. Redrawn from Gelardi et al. (2014).

 

References

Ayala-Vásquez O, Pérez-Moreno J, Pinzón JP, Garibay-Orijel R. et al. 2023 –Broadening the knowledge of Mexican boletes: Addition of a new genus, seven new species, and three new combinations. Journal of Fungi 9(12), 1126. 

Farid A, Franck AR, Garey JR. 2017 – Boletus rubricitrinus belongs in Pulchroboletus (Boletaceae). Czech Mycology 69(2), 143–162.

Gelardi M, Simonini G, Ercole E, Vizzini A. 2014 – Alessioporus and Pulchroboletus (Boletaceae, Boletineae), two novel genera for Xerocomus ichnusanus and X. roseoalbidus from the European Mediterranean basin: molecular and morphological evidence. Mycologia 106 (6), 1168–1187. 

 

Entry by

Priyashantha AKH, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand 

 

(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)

 

Published online 2 December 2024

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