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Phylogenetic relationships among false truffle genera of Paxillaceae- Alpova, Melanogaster, Neoalpova , and Paralpova , gen. nov.
- Source :
-
Mycologia [Mycologia] 2021 Jul-Aug; Vol. 113 (4), pp. 828-841. Date of Electronic Publication: 2021 Jun 10. - Publication Year :
- 2021
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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