Cryoseston was discovered for the first time in the Vitosha Mountains (Bulgaria)in 2005. The snow algal community was formed by Chloromonas nivalis (syn.
Scotiella nivalis), *Chloromonas brevispina (syn. Cryocystis brevispina).
Chlamydomonas cf. nivalis, *Chloromonas rostafiński, *Chromulina elegans, *Stichococcus bacillaris fo. cryophila, Chionaster nivalis, *Selenotila nivalis (syn. Selenozyma). *New species for Bulgaria.