Parnigua Tedersoo, 2024

Tedersoo, Leho, Magurno, Franco, Alkahtani, Saad & Mikryukov, Vladimir, 2024, Phylogenetic classification of arbuscular mycorrhizal fungi: new species and higher-ranking taxa in Glomeromycota and Mucoromycota (class Endogonomycetes), MycoKeys 107, pp. 249-271 : 249-271

Parnigua Tedersoo gen. nov.

Type species.

Parnigua craigii Tedersoo.

Description.

Covers the monophyletic group in Parniguaceae (Fig. 2 ). Phylogenetically delimited as the least inclusive clade covering sequence accessions EUK 1635261 and EUK 1602353 (Suppl. material 3).

Notes.

Based on stringent criteria, there are around five species in this genus, but all these may represent a single variable biological species. In this genus, across and within species, the ITS region has very low variability when compared with LSU (up to 3 % differences across species). Other putative species in Parnigua are represented by sequences EUK 1602947 (GSMc plot G 4444, mixed forest soil in Altnurga, Estonia, 58.53676 ° N, 26.28321 ° E); EUK 1603686 (GSMc plot G 5844, wet pasture land soil in Tuhala, Estonia, 59.23003 ° N, 25.00283 ° E); EUK 1633696 (GSMc plot G 4207 Tilia cordata forest soil in Ubari, Estonia, 59.492609 ° N, 25.285663 ° E); EUK 1603848 (GSMc plot G 5883, flooded grassland soil in Kasari, Estonia, 58.73608 ° N, 23.98599 ° E); EUK 1602353 (GSMc plot G 4389, Quercus - Tilia forest soil in Naha, Estonia, 57.520914 ° N, 26.601199 ° E); MF 484762 (agricultural soil in England); and MW 163928 ( Crocus sativus cropland soil in Aosta Valley, Italy). The genus can be found from various soils but not from roots. However, SSU sequences are lacking, and links to AM fungi in SSU-based studies cannot be tested.

Figures

Figure 2. Phylogenetic position of genera and genus-level groups of Endogonomycetes based on Maximum Likelihood analysis of SSU- 5.8 S-LSU sequences. The clades are collapsed, with the number of sequences included in parentheses. Question marks above branches indicate low ultra-rapid bootstrap support (< 95). Orders are highlighted in different colours. The uncollapsed phylogram is given in Suppl. material 3.