Glomus is likely related to the fossil fungus Glomites, discovered in the Rhynie chert deposits from the Early Devonian (400 million years ago).

As with other AM fungi, all Glomus species are thought to be obligate symbionts, dependent on their mycorrhizal association with plant roots to complete their life cycle.

Glomus species are found in nearly all terrestrial habitats, including arable land, deserts, grasslands, tropical forests, and tundras.

Inside the root, the fungus forms arbuscules, which are highly branched hyphal structures that serve as sites of nutrient exchange with the plant.

Halary et al.[5] searched the genomes of four Glomus species for the presence of genes that encode proteins essential for meiosis.

The study indicated that the Glomus species contain 51 genes encoding all the tools necessary for meiotic recombination and associated DNA repair processes.