Species of the genus Fuscopannaria P.M. Jørg. (Lichens) in the Republic of Sakha (Yakutia)

Abstract

The  Republic  of  Sakha  (Yakutia)  is  the  largest  constituent  entity  of  the  Russian  Federation, located  in  the  north-east  of  Russia  and  characterised  by  a  harsh  sharply  continental  climate  with  very low air temperatures in winter and high in summer, insignificant average annual precipitation, and the spread of permafrost. The genus of ascomycetes lichens  Fuscopannaria P. M. Jørg. includes small species found in areas with a cool temperate climate in the northern hemisphere. According to the literature data, 3 species of the genus  Fuscopannaria were previously known in Yakutia. The species  F. viridescens  was discovered in the Lena River delta. The location of the species F. praetermissa is indicated for the Arctic zone and for the State Nature Reserve "Olekminsky". The species F. leucosticta  (=  Panaria leucosticta) is  given  for  the  Tokinsky  Stanovik.  The  purpose  of  this  work  is  to  generalise  the  data  on  the  lichens  of  the  genus  Fuscopannaria,  which  are  common  in  Yakutia;  revision  of  the  genus  in  the  lichen   collections of the IBPC SB RAS Herbarium (SASY). As a result of the conducted research, the author  identified the species F. ahlneri; the species  F. leucosticta  has been redefined as  F. praetermissa. For a new species in Yakutia, F. ahlneri is given a comparative description, distinctive features, information on location, ecology. Criteria for the identification of a group of cyanobiont lichen species native to Siberia  and the Far East, having similar morphological features with the presence of photobiont Nostoc  in the thallus, rarely forming apothecia, are discussed. A key has been compiled to identify the species of the  genus  Fuscopannaria  in  Yakutia:  F. ahlneri ,  F.  praetermissa ,  F.  viridescens.  Updated  data  on  the  specimens of the genus  Fuscopannaria in the SASY herbarium.