Considered one of the most important contributions to the classification of AMF, the manuscript by Schüssler et al. (2001) groups the AMF and the fungus Geosiphon pyriforme (which forms symbiosis with Nostoc), in the new Phylum Glomeromycota. The classification presented is based entirely on phylogenetic analysis using genetic characters (SSU ribosomal RNA sequence). In this classification, the Phylum Glomeromycota was hypothesized to share a common ancestor with Ascomycota and Basidiomycota. The authors also proposed four new orders and new families.
Phylum: Glomeromycota
Class: Glomeromycetes
Order: Glomerales
Family: Glomeraceae
Genus: Glomus
Order: Diversisporales
Family: Gigasporaceae
Genera: Gigaspora, Scutellospora
Family: Acaulosporaceae
Genera: Acaulospora, Entrophospora
Family: Diversisporaceae
Genus: Diversispora
Order: Paraglomerales
Family: Paraglomeraceae
Genus: Paraglomus
Order: Archaeosporales
Family: Archaeosporaceae
Genus: Archaeospora
Family: Geosiphonaceae
Genus: Geosiphon
Schüßler A, Schwarzott D, Walker C (2001) A new fungal phylum, the Glomeromycota: phylogeny and evolution. Mycol Res 105:1413–1421