Rasamsonia

Rasamsonia is a genus of fungi in the family Trichocomaceae, circumscribed in 2011 by mycologists Jos Houbraken and Jens Frisvad. It is characterized from other genera of the Trichocomaceae by the following combination of features: species are thermotolerant or thermophilic; their conidiophores have distinctly rough-walled stipes; conidia are olive brown; and ascomata, if present, have minimal covering. Rasamsonia phenotypically resembles Paecilomyces, in that both have thermotolerant species, produce olive-brown conidia, and form ascomata with no or scarce ascomatal covering; Rasamsonia, however, differs from Paecilomyces in having more regularly branched conidiophores with distinct rough-walled structures. The type species is Rasamsonia emersonii, a fungus formerly classified in the genus Talaromyces.[1]

Rasamsonia
Scientific classification
Kingdom:
Fungi
Division:
Ascomycota
Class:
Eurotiomycetes
Order:
Eurotiales
Family:
Trichocomaceae
Genus:
Rasamsonia

Houbraken & Frisvad (2011)
Type species
Rasamsonia emersonii
(Stolk) Houbraken & Frisvad (2011)

Clinical relevance

Due to an increase in reports of human and animal mycosis by Rasamsonia argillacea (formerly Geosmithia argillacea),[2] it has been considered an emerging pathogen. In 2013, molecular analysis was used to identify four species in the R. argillacea species complex, including R. eburnea, and the newly-described R. piperina and R. aegroticola. These fungi, which can be identified with internal transcribed spacer sequences, have similar antifungal susceptibility profiles.[3]

Species
  • Rasamsonia aegroticola Houbraken, S.Giraud & Samson (2012)[3]
  • Rasamsonia argillacea (Stolk, H.C.Evans & T. Nilsson) Houbraken & Frisvad (2011)
  • Rasamsonia brevistipitata Houbraken & Frisvad (2011)
  • Rasamsonia byssochlamydoides (Stolk & Samson) Houbraken & Frisvad (2011)
  • Rasamsonia columbiensis Jurjević, Hubka & S.W.Peterson (2016)
  • Rasamsonia composticola Y.Y.Su & L.Cai (2012)[4]
  • Rasamsonia cylindrospora (G.Sm.) Houbraken & Frisvad (2011)
  • Rasamsonia eburnea (Yaguchi, Someya & Udagawa) Houbraken & Frisvad (2011)
  • Rasamsonia emersonii (Stolk) Houbraken & Frisvad (2011)
  • Rasamsonia piperina Houbraken, S.Giraud & Samson (2012)[3]
  • Rasamsonia pulvericola J.B.Tanney & K.A.Seifert (2013)[5]

References
  1. Houbraken, J.; Spierenburg, H.; Frisvad, J.C. (2012). "Rasamsonia, a new genus comprising thermotolerant and thermophilic Talaromyces and Geosmithia species". Antonie van Leeuwenhoek. 101 (2): 403–421. doi:10.1007/s10482-011-9647-1. PMC 3261388. PMID 21965082.
  2. Giraud, S.; Favennec, L.; Bougnoux, M.E.; Bouchara, J.P. (2013). "Rasamsonia argillacea species complex: taxonomy, pathogenesis and clinical relevance". Future Microbiology. 8 (8): 967–978. doi:10.2217/fmb.13.63. PMID 23902144.
  3. Houbraken, J.; Giraud, S.; Meijer, M.; Bertout, S.; Frisvad, J.C.; Meis, J.F.; Bouchara, J.P.; Samson, R.A. (2013). "Taxonomy and antifungal susceptibility of clinical important Rasamsonia species". Journal of Clinical Microbiology. 51 (1): 22–30. doi:10.1128/JCM.02147-12. PMC 3536228. PMID 23077129.
  4. Su, Yuan-Ying; Ca, Lei (2013). "Rasamsonia composticola, a new thermophilic species isolated from compost in Yunnan, China". Mycological Progress. 12 (2): 213–221. doi:10.1007/s11557-012-0827-9.
  5. Tanney, Joey B.; Seifert, Keith A. (2013). "Rasamsonia pulvericola sp. nov., isolated from house dust". IMA Fungus. 4 (2): 205–212. doi:10.5598/imafungus.2013.04.02.06. PMC 3905939. PMID 24563833.
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