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Cryptococcus nemorosus sp. nov. and Cryptococcus perniciosus sp. nov., related to Papiliotrema Sampaio et al. (Tremellales)

¹ Russia Collection of Microorganisms, Institute for Biochemistry and Physiology of Micro-organisms, Russian Academy of Sciences, Pushchino 142290, Russia
² Centro de Recursos Microbiologicos, Secção Autónoma de Biotecnologia, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
³ Mendeleev Chemical–Technological University, Moscow 125820, Russia

Correspondence
Wladyslav I. Golubev
wig{at}ibpm.serpukhov.su

Three mycocinogenic strains representing the genus Cryptococcus were isolated on glucuronate agar from plants and turf collected in the Prioksko-terrasny biosphere reserve (Russia). These isolates fit the standard description of Cryptococcus laurentii, but differ from its type strain in both their mycocin-sensitivity profiles and the killing patterns of their mycocins. Sequence analyses of the D1/D2 domain of the 26S rDNA and of the internal transcribed spacer region confirmed that these isolates represent two novel species, for which the names Cryptococcus nemorosus sp. nov. (type strain VKM Y-2906^T) and Cryptococcus perniciosus sp. nov. (type strain VKM Y-2905^T) are proposed. Morphological, physiological and biochemical characteristics, as well as mycocinotyping and molecular analysis, show a close affinity between these two novel anamorphic species and the teleomorphic species Papiliotrema bandonii (Tremellales).

The GenBank accession numbers for the 26S rDNA D1/D2 region sequences of C. perniciosus sp. nov. PYCC 5769^T and C. nemorosus sp. nov. PYCC 5768^T are AF472624 and AF472625.

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