Abstract
In order to examine the systematic position of Entyloma callitrichis Liro, morphological, ultrastructural and molecular characters of E. callitrichis and some species of the Entylomatales and Doassansiales were studied and compared. The results show that E. callitrichis belongs to the Doassansiaceae, occupying a basal position within this family. In contrast with the other species of Doassansiaceae, the teliospores of E. callitrichis are not arranged in spore balls. Therefore, the new genus Doassinga is proposed to accommodate E. callitrichis.