Cryolevonia schafbergensis
Cryolevonia schafbergensis A. Pontes, J. Ruethi, B. Frey, A. Aires, A. Thomas, D. Overy, B. Halti, R. Kerr & J.P. Sampaio 2020, in Pontes et al., International journal of systematic and evolutionary microbiology 70(4), 2334-2338. (2020)
Etymology: Cryolevonia schafbergensis (schaf.berg.en'sis. N.L. fem. adj. schafbergensis pertaining to Schafberg, the name of a mountain area located up to Pontresina in the upper Engadine valley in Switzerland, where the type strain was isolated).
Diagnosis: After 2 weeks on YM agar at 8 °C cultures have a light pink colour and have a butyrous texture. After 2 weeks of growth on YM agar at 8 °C, cells are elongated (6–14×2–3 μm) (Figure 2) and proliferation is done by budding at the distal ends of the cell. On Dalmau plates after 4 weeks at 8 °C, rudimentary pseudohyphae are present but true hyphae are not formed. On potato dextrose agar incubated at 8 °C for 8 weeks inconspicuous stretches of narrow hyphae of approximately 1 μm in diameter and devoid of clamp connections are formed. Occasionally globose to sub-globose teliospore-like structures measuring 6–10 μm in diameter can be observed on the hyphae. The induction of germination of the teliospore-like structures was unsuccessful, even after a prolonged resting stage of 12 weeks in demineralized water kept at 4 °C.
Index Fungorum Number: IF831395
Figure 2. Micrographs of Cryolevonia schafbergensis. (a–d) Yeast cells of PYCC 8347T on yeast–malt agar after 2 weeks at 8 °C and (e) after 10 months on corn meal agar incubated at 8 °C. (f–h) Teliospore-like structures formed on short hyphal stretches devoid of clamp connections on potato dextrose agar incubated at 8 °C for 2 months. Bars, 10 μm.
Reference:
Cunningham, J. L., Bakshi, B. K., Lentz, P. L., & Gilliam, M. S. (1976). Two new genera of leaf-parasitic fungi (Basidiomycetidae: Brachybasidiaceae). Mycologia, 68(3), 640-654.
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