The genus Biazrovia is described from Siberia for the single new species B. stereocaulicola growing on Stereocaulon species. It is characterized by a lichenicolous habit; finally urceolate orange-brown apothecia; a cupulate non-hairy exciple; a hyaline, I−, K/I− hymenium; filiform, apically swollen paraphyses; 8-spored, I−, K/ I− asci with an apically thickened wall without a distinct ocular chamber; and hyaline, trans-septate, smooth-walled, non-halonate ascospores. The new genus is provisionally included in the Ostropales. Key words: lichen-inhabiting fungi, Ostropales, Russia, Stereocaulon.