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Geosmithia
| Geosmithia | |
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| Geosmithia morbida on leaves of black walnut | |
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| Genus: | Geosmithia Pitt (1979)
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| Type species | |
| Geosmithia lavendula (Raper & Fennell) Pitt (1979)
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Geosmithia is a genus of anamorphic fungi of uncertain familial placement in the order Hypocreales. The genus, circumscribed by Australian mycologist John Pitt in 1979,[1] is widely distributed. A 2008 estimate placed ten species in the genus,[2] but several new species have since been described. Thousand cankers disease, which affects economically important black walnut (Juglans nigra) populations in North America, is caused by Geosmithia morbida.[3]
Species in the genus are generally similar to those in Penicillium, but can be distinguished from them by forming cylindrical conidia from rough-walled phialides. Additionally, the conidia of Geosmithia do not have a green color, in contrast to the characteristic blue-grey or green-grey conidia of Penicillium. Some Geosmithia species have teleomorphic forms that are classified in the genus Talaromyces. However, Geosmithia is a polyphyletic taxon with evolutionary affinities to at least three groups of the euascomycete lineage within the Ascomycota.[4] The generic name Geosmithia honors British mycologist George Smith.[1]
- ^ a b Cite error: The named reference
Pitt 1979was invoked but never defined (see the help page). - ^ Cite error: The named reference
Kirk 2008was invoked but never defined (see the help page). - ^ Cite error: The named reference
Derickx 2013was invoked but never defined (see the help page). - ^ Cite error: The named reference
Ogawa 1997was invoked but never defined (see the help page).
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