Xerotolerant fungi in house dust: taxonomy of Spiromastix, Pseudospiromastixand Sigleriagen. nov. in Spiromastigaceae (Onygenales, Eurotiomycetes)

Autor: Hirooka, Yuuri, Tanney, Joey B., Nguyen, Hai D.T., Seifert, Keith A.
Zdroj: Mycologia; January 2016, Vol. 108 Issue: 1 p135-156, 22p
Abstrakt: During a global investigation of fungi in house dust, we isolated six novel arthroconidial fungi. Phylogenies from combined analysis of nuc rDNA 18S, 28S and internal transcribed spacers sequences demonstrated that these fungi and two species preserved in culture collections represent undescribed species of Spiromastigaceae, Onygenales. Seven of the eight species lacked sexual states and only characters of asexual states and growth rates on different media could be used to characterize them. The eighth species produced ascomata only on water agar. We introduce six new species and one new combination in Spiromastixand validate the recently proposed family Spiromastigaceae, genus Pseudospiromastixand combination Ps. tentaculata. The new genus Sigleriais proposed for two new species that differ from Spiromastixby conidiophore branching patterns, slower growth and a limited ability to utilize nitrate as a sole N source. A key to the three genera of Spiromastigaceae, Spiromastix, Pseudospiromastixand Sigleria, is provided. Phylogenetic analyses support the placement of Spiromastigaceae within Onygenales.
Databáze: Supplemental Index