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Urocystidales
	Urocystis colchici on onions
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Basidiomycota
Class:	Ustilaginomycetes
Order:	Urocystidales; R. Bauer & Oberw., 1997
Synonyms
	Urocystidiales R. Bauer & Oberw.; Urocystales R. Bauer & Oberw.;

The Urocystidales are an order of fungi within the class Ustilaginomycetes. The order contains 6 families and about 400 genera. They are a sister order to Ustilaginales.

Urocystidales is also known and classified as the smut fungi.^[3] They are serious plant pathogens, Urocystis, is one of the representative genera of the order, it is an example of a smut genus that has a wide host range. The type species Urocystis occulta (Wallr.) A.A. Fisch. Waldh (1867), was described as a pathogen on rye (Secale cereale).^[4] They are found in marine and terrestrial environments.^[1] The aquatic members of the Doassansiopsis genera are found in the tropics or subtropics.^[5]

Morphology

They are distinguished from other fungi by the existence of haustoria (root-like structure) and pores in the septa of soral hyphae.^[6]^[7]

Families

It was formed in 1997,^[7] and consisted (then) of 4 families, (Doassansiopsidaceae, Glomosporiaceae, Melanotaeniaceae and Urocystidaceae with 1 genus.^[8]

Later, Melanotaeniaceae was moved to the Ustilaginales order by Begerow et al. in 2006,^[6]^[9] and others were added such as Fereydouniaceae and Floromycetaceae in 2014 S. Nasr, Soudi, H.D.T. Nguyen, M. Lutz & Piątek, and Mycosyringaceae in 2008.^[6]^[10]

As accepted by GBIF^[11] and others;^[12]

Doassansiopsidaceae (19) - only includes Doassansiopsis
Fereydouniaceae (3) - includes Fereydounia
Floromycetaceae (21) - includes Antherospora and Floromyces
Glomosporiaceae (117) - includes Thecaphora (incl. Glomosporium^[13] Sorosporium)
Mycosyringaceae (5) - includes Mycosyrinx
Urocystidaceae (228) - includes Flamingomyces, Melanoxa, Melanustilospora, Mundkurella, Tuburcinia, Urocystis, Ustacystis and Vankya

Figures in brackets are approx. how many species per family.^[11]

Note the DNA of family Doassansiopsidaceae has been studied.^[14]

Ecology

The leaves of the water-lily (Nymphaea nouchali) can be affected by the water-born fungi, Doassansiopsis nymphaea.^[15]

The leaves of Caldesia parnassifolia (Alisma reniforme) can be affected by the water-born fungi, Doassansiopsis hydrophila (A.Dietr.) Lavrov (syn Doassansiopsis martianoffiana).^[16]

References

^ ^a ^b "Urocystidales". www.marinespecies.org. WoRMS - World Register of Marine Species. Retrieved 13 August 2022.
^ Urocystidales in MycoBank.
^ Lutz, Matthias; Vánky, Kálmán; Bauer, Robert (2012). "Melanoxa, a new genus in the Urocystidales (Ustilaginomycotina)". Mycological Progress. 11: 149–158.
^ "Urocystis occulta CBS 102.71 v1.0". mycocosm.jgi.doe.gov. Retrieved 13 August 2022.
^ E. B. Gareth Jones, Kevin D Hyde and Ka-Lai Pang (editors) Freshwater Fungi: and Fungal-like Organisms (2014), p. 113, at Google Books
^ ^a ^b ^c David J. McLaughlin and Joseph W. Spatafora (editors)Systematics and Evolution: Part A, Part 1 (2014), p. 318, at Google Books
^ ^a ^b R., Bauer; F., Oberwinkler; K., Vánky (1997). "Ultrastructural markers and systematics in smut fungi and allied taxa". Can. J. Bot. 75: 1273–1314. doi:10.1139/b97-842.
^ Geoffrey Clough Ainsworth Ainsworth & Bisby's Dictionary of the Fungi (2008), p. 715, at Google Books
^ Begerow D, Stoll M, Bauer R.2006. A phylogenetic hypothesis of Ustilaginomycotina based on multiple gene analyses and morphological data. Mycologia 98: 906–916
^ Vánky K, Lutz M, Bauer R.2008. About the genus Thecaphora (Glomosporiaceae) and its new synonyms. Mycological Progress 7: 31–39
^ ^a ^b "Urocystidales". www.gbif.org. Retrieved 14 August 2022.
^ Outline of Basidiomycota, Mao-Qiang He, Rui-Lin Zhao, in Encyclopedia of Mycology, 2021
^ Vánky, Kálmán; Lutz, Matthias; Bauer, Robert (2008). "About the genus Thecaphora (Glomosporiaceae) and its new synonyms". Mycological Progress. 7: 31–39.
^ Begerow, D., Bauer, R. & Oberwinkler, F. 1998. Phylogenetic studies on nuclear large subunit ribosomal DNA sequences of smut fungi and related taxa. – Canadian Journal of Botany 75 [1997]: 2045-2056.
^ Dr.V.R. Patil Research on Fresh water fungi (2015), p. 113, at Google Books
^ B D Borse, K N Borse, S Y Patil, C M Pawara, L C Nemade and V R Patil Freshwater Higher Fungi of India (2015), p. 178, at Google Books