The genus Densospora, based on Glomus tubaeforme, and three new specie
s, D. nuda, D. nanospora, D. solicarpa, are described. Densospora is c
haracterised by the presence of small sporocarpic blastospores with si
ngle laminate walls that infrequently thicken, filling the lumen of th
e spore. In culture, G. tubaeforme has swellings on hyphae. The fungi
may form ectomycorrhizae.