Phoma Sacc.
(a form genus of coelomycetes)

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Taxonomic hierarchy:
GenusPhoma (a form genus of coelomycetes)
OrderPLEOSPORALES (an order of ascomycetes and lichens)
SubclassDOTHIDEOMYCETIDAE (a subclass of fungi)
ClassDOTHIDEOMYCETES (a class of ascomycetes)
SubphylumPEZIZOMYCOTINA (a subphylum of ascomycetes)
PhylumASCOMYCOTA (spore shooters, ascomycete)
KingdomFUNGI (true fungi)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)

Identification Works

AuthorYearTitleSource
Boerema, G.H., de Gruyter, J., Noordeloos, M.E. & Hamers, M.E.C. 2004 Phoma identification manual 448pp, CABI
Hawksworth, D.L. 1981 The lichenicolous Coelomycetes Bull. Br. mus. nat. hist. bot. Vol 9 (1): 1-98.

Phoma (a form genus of coelomycetes) may also be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Phoma (a form genus of coelomycetes)
BioInfoBioInfo (www.bioinfo.org.uk) has 69 host/parasite/foodplant and/or other relationships for Phoma (a form genus of coelomycetes)

The commonest form-genus of coelomycetes, Phoma form black medium thickness-walled, erumpent pycnidia on (usually) dead stems (occasionally leaves). The pycnidia produce simple conidia generally less than 15µm long, on short or imperceptible conidiophores. The conidia often contain two oil-droplets.

Many of the species are host limited (or at least there are different names which have been applied to Phoma on different hosts).

Phoma has been used as a taxonomic dumping ground for any coelomycete with simple hyaline spores.

Coelomycetes with medium thickness walled, erumpent pycnidia and simple, hyaline conidia generally less than 15µm long, on short or imperceptible conidiophores. Mostly on dead stems.

The similar Phomopsis produces slightly larger and tougher pycnidia but is best distinguished by the longer conidiophores.

Phyllosticta, with thinner walled pycnidia, is the equivalent on leaves.

Cultural studies are needed to identify most spp.

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