The genus Trichothecium is small and heterogeneous comprising seventy-three recorded species.
This genus was first reported in 1809.
 The main members of the genus include Trichothecium polybrochum, Trichothecium cystosporium, Trichothecium pravicovi, and Trichothecium roseum.
Trichothecium roseum has morphologically different conidiophores and conidia than the other three main species, which made development of these features the center of extensive study throughout the years.
Since Trichothecium fungi lack a sexual phase, systematic classification was not uniform following their discovery.
These fungi were initially grouped into Fungi imperfecti under the form classification Deuteromycetes.
In 1958, Tubaki expanded Hughes’ classification of soil Hyphomycetes, part of the form class of Fungi imperfecti, by adding a ninth section in order to accommodate T. roseum and its unique conidial apparatus.
Trichothecium has now been classified under the class Sordariomycetes.
A recent classification has placed Trichothecium under the phylum Ascomycota since they produce conidial stages that are similar to the perfect fungi.
The genus Trichothecium is small and heterogeneous comprising seventy-three recorded species. This genus was first reported in 1809.  The main members of the genus include Trichothecium polybrochum, Trichothecium cystosporium, Trichothecium pravicovi, and Trichothecium roseum. Trichothecium roseum has morphologically different conidiophores and conidia than the other three main species, which made development of these features the center of extensive study throughout the years. Since Trichothecium fungi lack a sexual phase, systematic classification was not uniform following their discovery. These fungi were initially grouped into Fungi imperfecti under the form classification Deuteromycetes. In 1958, Tubaki expanded Hughes’ classification of soil Hyphomycetes, part of the form class of Fungi imperfecti, by adding a ninth section in order to accommodate T. roseum and its unique conidial apparatus. Trichothecium has now been classified under the class Sordariomycetes. A recent classification has placed Trichothecium under the phylum Ascomycota since they produce conidial stages that are similar to the perfect fungi.
Trichothecium roseum