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Issue: Vol. 732 No. 3: 5 Dec. 2025
Type: Article
Published: 2025-12-05
DOI: 10.11646/phytotaxa.732.3.4
Page range: 267-279
Abstract views: 16
PDF downloaded: 1

Molecular phylogeny and taxonomic revision of Coleosporiaceae (Pucciniales): the genera Quasipucciniastrum and Aculeastrum reassessed and a new combination proposed

Komarov Botanical Institute of the Russian Academy of Sciences, Prof. Popov Str. 2, 197022 St Petersburg, Russia
Komarov Botanical Institute of the Russian Academy of Sciences, Prof. Popov Str. 2, 197022 St Petersburg, Russia
28S nuc rDNA Basidiomycota ITS Pucciniomycotina rust fungi type specimens 1 new nomenclature combination 1 new lectotypification Fungi

Abstract

Two genera of rust fungi, Quasipucciniastrum and Aculeastrum, have recently been described within the family Coleosporiaceae. However, their taxonomic status as separate, independent genera remained a matter of debate. In the present study, we investigated the taxonomy of Quasipucciniastrum and Aculeastrum using morphological and molecular (nuc rDNA 5.8S-ITS2 [ITS barcode] and partial nuc 28S rDNA D1–D3 regions [28S]) data, including a detailed study of the type collections of Pucciniastrum potentillae and Thekopsora agrimoniae. Based on type specimen examination, Asian species Q. potentillae is considered synonym of Q. ochraceum. Furthermore, as the main outcome of our phylogenetic study, we synonymize Quasipucciniastrum and Aculeastum with the genus Thekopsora, and propose a new nomenclatural combination Thekopsora arctica.

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How to Cite

Malysheva, V. & Dudka, V. (2025) Molecular phylogeny and taxonomic revision of Coleosporiaceae (Pucciniales): the genera Quasipucciniastrum and Aculeastrum reassessed and a new combination proposed. Phytotaxa 732 (3): 267–279. https://doi.org/10.11646/phytotaxa.732.3.4