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Scanning electron micrograph of Paecilomyces variotii
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Eurotiomycetes
Order: Eurotiales
Family: Thermoascaceae
Genus: Paecilomyces
Bainier (1907)
Type species
Paecilomyces variotii
Bainier (1907)
  • Byssochlamys Westling (1909)
  • Corollium Sopp (1912)
  • Graphidium Lindau (1909)
  • Spicariopsis R.Heim (1939)

Paecilomyces is a genus of fungi. A number of species in this genus are plant pathogens.

Several of the entomopathogenic species, such as "Paecilomyces fumosoroseus" have now been placed in the genus Isaria, in the order Hypocreales and family Cordycipitaceae.[2]

In 1974, R.A. Samson transferred the nematicidal species Paecilomyces lilacinus to this genus.[3] However, publications in the 2000s (decade) indicated that the genus Paecilomyces was not monophyletic,[4] and the new genus Purpureocillium was created to hold the taxon which includes P. lilacinum: with both parts of the name referring to the purple conidia produced by the fungus.[5]



Traditionally, Paecilomyces held strictly asexual species[6] and later housed numerous anamorphic forms of fungi with their teleomorph described to a separate genus. From 41 described species in 2000[7] and over 100 known combinations in this genus, the amount of species in Paecilomyces reduced to 10 described species in 2020 following the adaptation of the "one fungus one name" rule.[6]

Species combinations[12] not listed by Houbraken et al. 2020[6]
Species formerly described in Paecilomyces

incertae sedis Ascomycota

See also



  1. ^ "Synonymy. Current Name: Paecilomyces Bainier, Bull. Soc. mycol. Fr. 23(1): 26 (1907)". Species Fungorum. Retrieved 9 September 2023.
  2. ^ "Archived copy". Archived from the original on 19 November 2015. Retrieved 18 November 2015.{{cite web}}: CS1 maint: archived copy as title (link)
  3. ^ Samson RA. (1974). "Paecilomyces and some allied hyphomycetes". Studies in Mycology. 6. Baarn: Centralbureau voor Schimmelcultures: 58.
  4. ^ Inglis PW, Tigano MS (2006). "Identification and taxonomy of some entomopathogenic Paecilomyces spp. (Ascomycota) isolates using rDNA-ITS Sequences" (PDF). Genetics and Molecular Biology. 29 (1): 132–6. doi:10.1590/s1415-47572006000100025.
  5. ^ Luangsa-Ard J, Houbraken J, van Doorn T, Hong SB, Borman AM, Hywel-Jones NL, Samson RA (2011). "Purpureocillium, a new genus for the medically important Paecilomyces lilacinus". FEMS Microbiology Letters. 321 (2): 141–9. doi:10.1111/j.1574-6968.2011.02322.x. PMID 21631575.
  6. ^ a b c d e f g h i j k l Houbraken J, Kocsubé S, Visagie CM, Yulmaz N, Wang XC, Meijer M, Kraak B, Hubka V, Bensch K, Samson RA, Frisvad JC (2020). "Classification of Aspergillus, Penicillium, Talaromyces and related genera (Eurotiales): An overview of families, genera, subgenera, sections, series and species". Studies in Mycology. 95: 5–169. doi:10.1016/j.simyco.2020.05.002. hdl:2263/78967.
  7. ^ Pitt JI, Samson RA, Frisvad JC (2000). "List of accepted species and their synonyms in the family Trichocomaceae". In Samson RA, Pitt JI (eds.). Integration of Modern Taxonomic Methods for Penicillium and Aspergillus Classification. Harwood Academic Publishers. pp. 9–49.
  8. ^ Page Paecilomyces clematidis on "Mycobank". Westerdijk Fungal Biodiversity Institute. Retrieved 6 September 2023.
  9. ^ Page Paecilomyces formosus on "Mycobank". Westerdijk Fungal Biodiversity Institute. Retrieved 7 September 2023.
  10. ^ Page Paecilomyces paravariotii on "Mycobank". Westerdijk Fungal Biodiversity Institute. Retrieved 7 September 2023.
  11. ^ Page Paecilomyces penicilliformis on "Mycobank". Westerdijk Fungal Biodiversity Institute. Retrieved 7 September 2023.
  12. ^ Page Paecilomyces on "Mycobank". Westerdijk Fungal Biodiversity Institute. Retrieved 7 September 2023.
  13. ^ Page Taxonomy browser ('Paecilomyces' clade) on "NCBI Taxonomy Brower". NCBI. Retrieved 7 September 2023.