Taphrinomycotina

Taxobox
name = Taphrinomycotina

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image_width = 200px
image_caption = Peach tree ("Prunus persica") attacked by "Taphrina deformans"
regnum = Fungi
subregnum = Dikarya
phylum = Ascomycota
subphylum = Taphrinomycotina
subphylum_authority = O.E. Erikss. & Winka 1997 [cite journal | author = Eriksson, O.E. & K. Winka | year = 1997 | title = Supraordinal taxa of "Ascomycota" | journal = Myconet | volume = 1 | pages = 1–16]
subdivision_ranks = Classes
subdivision =
Neolectomycetes
Pneumocystidomycetes
Schizosaccharomycetes
Taphrinomycetes

Taphrinomycotina is one of three subphyla constituting the Ascomycota (fungi that form their spores in a sac-like "ascus") and is more or less synonymous with the slightly older invalid name "Archiascomycetes" (sometimes spelled "Archaeascomycetes"). Recent molecular studies suggest that the group is monophyletic and basal to the rest of the Ascomycota.cite journal | author=Lutzoni, F., "et al." | title= Assembling the fungal tree of life: progress, classification, and evolution of subcellular traits | journal=Amer. J. Bot. | year=2004 | pages=1446–1480 | volume=91 | doi= 10.3732/ajb.91.10.1446] cite journal | author=James, T.Y., "et al." | title=Reconstructing the early evolution of Fungi using a six-gene phylogeny | journal=Nature | year=2006 | pages=818–822 | volume=443 | pmid = 17051209 | doi=10.1038/nature05110]

The Schizosaccharomycetes are yeasts (e.g. "Schizosaccharomyces") that reproduce by fission rather than budding unlike most other yeasts, many of which are in the subphylum Saccharomycotina.

The Taphrinomycetes are dimorphic plant parasites (e.g. "Taphrina") with both a yeast state and a filamentous (hyphal) state in infected plants. They characteristically infect leaves, catkins and branches, not roots.

The Neolectomycetes are species in a single genus, "Neolecta", which are the only members of the subphylum that form fruiting bodies, and which specifically grow out of root tips. They may have a yeast state (ascospores bud in the asci).

The Pneumocystidomycetes also encompasses only one genus, "Pneumocystis", one of which causes Pneumocystis pneumonia (PCP) in humans. All species infect mammalian lungs and are yeasts.

None have ascogenous hyphae giving rise to the asci.

References

* [http://ocid.nacse.org/classroom/fungi/bot461/lectures/Lecture%2014.ppt The Oregon Coalition of Interdisciplinary Databases: "Archiascomycetes: Early Diverging Ascomycetes"]