Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Sordariomycetes O.E. Erikss. & Winka (1997)
       Subclass Diaporthomycetidae Senan., Maharachch. & K.D.Hyde (2015)
         Family Woswasiaceae H. Zhang, K.D.Hyde & Maharachch. (2017), incertae sedis
           1 Genus Cyanoannulus Raja, J. Campb. & Shearer (2003)
           2 Genus Woswasia Jaklitsch, Réblová & Voglmayr (2013)
           3 Genus Xylochrysis Réblová (2014)