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Phylogenetic relationships among false truffle genera of Paxillaceae- Alpova, Melanogaster, Neoalpova , and Paralpova , gen. nov.

Authors :
Alvarado P
Cabero J
Moreno-Mateos D
Vizzini A
Alonso J
Lebeuf R
Siquier JL
Vidal JM
Source :
Mycologia [Mycologia] 2021 Jul-Aug; Vol. 113 (4), pp. 828-841. Date of Electronic Publication: 2021 Jun 10.
Publication Year :
2021

Abstract

A phylogenetic analysis of nuc rDNA internal transcribed spacer region ITS1-5.8S-ITS2 (ITS), nuc rDNA 28S domains D1-D2 (28S), and the region between conserved domains 6 and 7 of RNA polymerase II second largest subunit ( RPB2 ) from multiple species of Alpova and Melanogaster revealed four major clades, proposed here as distinct genera: Melanogaster, Alpova s. str. containing the type species A. cinnamomeus, Neoalpova for the species around N. rubescens , and the new genus Paralpova , proposed here for P. artikutzensis , sp. nov. Alpova, Neoalpova , and Paralpova form a monophyletic lineage of hypogeous fungi with a pseudoparenchymatic structure in their peridium (at least in the inner layer) that could be interpreted as a single genus, but they are separated due to distinct morphological and ecological traits. Alpova s. str. is employed for species strictly associated with Alnus , lacking a conspicuous odor, and producing relatively small basidiomata and basidiospores <10 µm long. Neoalpova and Paralpova occur under other hosts, present a conspicuous odor, have larger basidiomata and basidiospores than Alpova , and have a prosenchymatic peridiopellis. Finally, Paralpova is characterized by the yellowish gleba, monosporic or bisporic basidia, and basidiospores >15 µm long with a mean length/width ratio (Q <subscript>m</subscript> ) of <2.0. In addition, two new species of Neoalpova are proposed: N. arenicola , associated with Mediterranean forests in sandy soils and with spores slightly smaller and wider than those of N. rubescens , and N. montecchii , a cryptic species very similar to N. rubescens but for its putatively smaller peridiopellis elements and its genetic profile.

Details

Language :
English
ISSN :
1557-2536
Volume :
113
Issue :
4
Database :
MEDLINE
Journal :
Mycologia
Publication Type :
Academic Journal
Accession number :
34110972
Full Text :
https://doi.org/10.1080/00275514.2021.1911552