Thirty-nine yeast strains were recovered from a field nest of a primitive and putative novel attine
ant species in the genus Myrmicocrypta (Hymenoptera: Formicidae: tribe Attini). Yeasts isolated
from the fungus garden and waste deposit included Candida dubliniensis, Candida oleophila,
Cryptococcus haglerorum and Hanseniaspora uvarum. In addition, one morphological type was
isolated overwhelmingly. Sequencing data of partial large-subunit (LSU) rDNA and the internal
transcribed spacer (ITS) region coupled with morphological and physiological characterization
accommodated this morphotype in a separate taxonomic position in relation to the known species
of Trichosporon (Basidiomycota: Trichosporonales). Here, we propose a novel yeast species
named Trichosporon chiarellii sp. nov. based on the description of 34 isolates; the type strain is
strain FCP 540806T (5CBS 11177T
).