Revision of Paraglomeromycetes unveils a new order (Pervertustales), a new family (Innosporaceae), and a new genus (Opikia) in Glomeromycota
- 1Departamento de Micologia, Universidade Federal de Pernambuco, Cidade Universitária, Av. da Engenharia s/n, Recife 50740-600, PE, Brazil
Abstract
Currently, the fungal class Paraglomeromycetes (phylum Glomeromycota) consists of one order, Paraglomerales, with two families: Paraglomeraceae, comprising the genera Paraglomus with ten species and Innospora with one species, and the monogeneric and monospecific Pervetustaceae represented by Pervetustus with Pe. simplex. However, our morphological analyses of these species and an undescribed specimen morphologically resembling other Paraglomeromycetes species, as well as analyses of sequences of these fungi and environmental sequences, indicated that the current taxonomic composition of this class should be updated. We did so here by creating in Paraglomeromycetes Pervetustales ord. nov. with Pervetustus and Opikia catenata gen. nov. and sp. nov., as well as transferring Innospora with In. majewskii to Innosporaceae fam. nov. These novelties were introduced primarily based on strong genetic divergences of the analyzed taxa, as many morphological and histochemical features of their spores and mycorrhizal structures overlap. Only Op. catenata possesses the unique trait of occasionally producing spores in chains. This mode of sporulation has also not been recognized in any other Glomeromycota species. Unlike species of Pervetustales and Innosporaceae, which produce single-walled spores, the subcellular spore structure of Paraglomus species contains one or two walls.
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BibTeX
@misc{niezgoda2026revision,
title = {{Revision of Paraglomeromycetes unveils a new order (Pervertustales), a new family (Innosporaceae), and a new genus (Opikia) in Glomeromycota}},
author = {P. Niezgoda and J. Błaszkowski and F. Oehl and E. Sieverding and T. G. L. Oliveira and D. M. A. Assis and B. T. Goto and M. A. Corazon-Guivin and Y. Liu and G. A. Silva},
howpublished = {bioRxiv},
year = {2026},
month = sep,
doi = {10.64898/2026.09.12.751156},
url = {https://www.biorxiv.org/content/10.64898/2026.09.12.751156v1},
note = {CC BY},
}
RIS
TY - UNPB
TI - Revision of Paraglomeromycetes unveils a new order (Pervertustales), a new family (Innosporaceae), and a new genus (Opikia) in Glomeromycota
AU - P. Niezgoda
AU - J. Błaszkowski
AU - F. Oehl
AU - E. Sieverding
AU - T. G. L. Oliveira
AU - D. M. A. Assis
AU - B. T. Goto
AU - M. A. Corazon-Guivin
AU - Y. Liu
AU - G. A. Silva
PY - 2026
DA - 2026/09/12
PB - bioRxiv
DO - 10.64898/2026.09.12.751156
UR - https://www.biorxiv.org/content/10.64898/2026.09.12.751156v1
AB - Currently, the fungal class Paraglomeromycetes (phylum Glomeromycota) consists of one order, Paraglomerales, with two families: Paraglomeraceae, comprising the genera Paraglomus with ten species and Innospora with one species, and the monogeneric and monospecific Pervetustaceae represented by Pervetustus with Pe. simplex. However, our morphological analyses of these species and an undescribed specimen morphologically resembling other Paraglomeromycetes species, as well as analyses of sequences of these fungi and environmental sequences, indicated that the current taxonomic composition of this class should be updated. We did so here by creating in Paraglomeromycetes Pervetustales ord. nov. with Pervetustus and Opikia catenata gen. nov. and sp. nov., as well as transferring Innospora with In. majewskii to Innosporaceae fam. nov. These novelties were introduced primarily based on strong genetic divergences of the analyzed taxa, as many morphological and histochemical features of their spores and mycorrhizal structures overlap. Only Op. catenata possesses the unique trait of occasionally producing spores in chains. This mode of sporulation has also not been recognized in any other Glomeromycota species. Unlike species of Pervetustales and Innosporaceae, which produce single-walled spores, the subcellular spore structure of Paraglomus species contains one or two walls.
ER -