Phylum Ascomycota Caval.-Sm. (1998) - sac fungi
   Subphylum Pezizomycotina O.E. Erikss. & Winka (1997)
     Class Sordariomycetes O.E. Erikss. & Winka (1997)
       Subclass Hypocreomycetidae O.E. Erikss. & Winka (1997)
         Order Halosphaeriales Kohlm. (1986) see Order Microascales Luttr. ex Benny & Kimbr. (1980)
           Family Halosphaeriaceae E. Müll. & Arx ex Kohlm. (1972)
             Genus Trailia G.K. Sutherl. (1915)