Endogonaceae Paol., emend. Tedersoo

Type genus.

Endogone Link.

Description.

Fruiting body hypogeous or on debris, globose, irregular, sometimes resupinate, 1–10 mm diam., may be composed of aggregated zygosporangial clusters, with zygospores formed on apposed suspensors. Hyphae of fruiting body tissue coenocytic, aseptate, sometimes with secondary septa that form micropores. Reproductive structures as zygosporangia, rarely azygosporangia (co-existing with zygosporangia in Endogone pisiformis) distributed randomly or radially in fruiting bodies, 100–700 μm diam., with yellow granular contents. Zygosporangial wall comprises outer sporangiothecium with 1–4 openings and inner eusporium with no openings. Azygosporangia rare, with a single-layered wall, and separated from the single suspensor by a gametangial septum. Forms a monophyletic group in Endogonales as the least inclusive clade covering accessions LC 002628, EUK 1601764 and EUK 1601442.

Notes.

Covers species of Endogone that are saprotrophic or potentially ectomycorrhizal (/ endogone 2 and / endogone 3 lineages, sensu Tedersoo and Smith (2017)) and four closely-related genus-level taxa.