Archaeosporales

Archaeosporales
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Glomeromycota
Class:	Glomeromycetes
Order:	Archaeosporales; C.Walker & A.Schüßler (2004)
Families
	Ambisporaceae; Ambispora Ambispora appendicula; Ambispora callosa; Ambispora fennica; Ambispora gerdemannii; Ambispora granatensis; Ambispora leptoticha; ; Archaeosporaceae; Archaeospora Archaeospora gerdemannii; Archaeospora leptoticha; Archaeospora schenckii; Archaeospora trappei; ; Geosiphonaceae; Geosiphon Geosiphon pyriformis; ;

Archaeosporales is an order of fungi best known as arbuscular mycorrhiza to vascular land plants (Tracheophyta). But also form free living endocyte symbioses with cyanobacteria.^[1] The free living forms may have a Precambrian fossil record back 2.2 Ga, well before evolution of Tracheophyta.^[4] However, the earliest fossils of Opisthokonta otherwise date back to the early Tonian, thus making this possibility questionable.

^ ^a ^b A. Schüßler; et al. (2001). "A new fungal phylum, the Glomeromycota: phylogeny and evolution". Mycol. Res. 105 (12): 1413–1421. doi:10.1017/S0953756201005196.
^ "International Culture Collection of Vesicular Arbuscular Mycorrhizal Fungi". Archived from the original on 2012-08-20. Retrieved 2013-02-25.
^ M. Krüger; C. Krüger; C. Walker; H. Stockinger; A. Schüßler (2011). "Phylogenetic reference data for systematics and phylotaxonomy of arbuscular mycorrhizal fungi from phylum to species level". New Phytologist. 193 (4): 970–984. doi:10.1111/j.1469-8137.2011.03962.x. PMID 22150759.
^ Retallack, G.J.; Krull, E.S.; Thackray, G.D. & Parkinson, D. (2013). "Problematic urn-shaped fossils from a Paleoproterozoic (2.2 Ga) paleosol in South Africa". Precambrian Research. 235: 71–87. doi:10.1016/j.precamres.2013.05.015.