This subclass has been reported as pathogenic, endophytic, parasitic, saprobic, fungicolous, lichenicolous, algicolous, coprophilous (animal dung) and insect fungi from aquatic and terrestrial habitats.

[2] The members of Hypocreomycetidae have light colored perithecia, non-amyloid or amyloid ascal rings, or those which lack apical rings and most taxa lack true paraphyses (Zhang et al.

[3] Hypocreomycetidae was established by Eriksson and Winka (1997) based on morphology and a single gene (SSU) phylogenetic analysis.

[1] The subclasses of Sordariomycetes was expanded from three to six, when Eriksson & Winka (1997) introduced Hypocreomycetidae, Sordariomycetidae and Xylariomycetidae based on morphology and nrDNA sequence data.

Hypocreomycetidae shows terrestrial ancestors, whereas marine and freshwater taxa have independently evolved.