Cryptococcusvaughanmartiniae sp. nov. and Cryptococcusonofrii sp. nov.: two new species isolated from worldwide cold environments

Twenty yeast strains, representing a selection from a wider group of more than 60 isolates were isolated from cold environments worldwide (Antarctica, Iceland, Russia, USA, Italian and French Alps, Apennines). The strains were grouped based on their common morphological and physiological characteristics. A phylogeny based on D1/D2 ribosomal DNA sequences placed them in an intermediate position between Cryptococcus saitoi and Cryptococcus friedmannii; the ITS1 and ITS2 rDNA phylogeny demonstrated that these strains belong to two related but hitherto unknown species within the order Filobasidiales, albidus clade. These two novel species are described with the names Cryptococcusvaughanmartiniae (type strain DBVPG 4736T) and Cryptococcusonofrii (type strain DBVPG 5303T).