Densosporales Tedersoo ord. nov.

Type family.

Densosporaceae Desirò, M. E. Sm., Bidartondo, Trappe & Bonito.

Description.

Densosporales is defined as a monophyletic group in Endogonomycetes (Fig. 2, Suppl. material 3) that corresponds to Densosporaceae sensu Desiro et al. (2017) . Covers Densosporacae and Planticonsortiaceae and the least inclusive clade with sequence accessions UDB 028692, EUK 1104889, EUK 1104816 and EUK 1601509 (Suppl. material 3).

Notes.

Densosporales harbours roughly one half of the Endogonomycetes based on LSU data. It comprises Densosporacae, Planticonsortiaceae and 16 additional family-level groups collectively covering> 200 species. LSU has much greater phylogenetic resolution compared with SSU (Suppl. materials 3, 4), and the potential utility of the ITS region seems to vary greatly by family. Many more ITS - LSU sequences are needed to understand family- and genus-level composition of Densosporales .