Byssochlamys is a former genus of fungi in the Trichocomaceae family, containing teleomorph forms of Paecilomyces.
[3] A health concern was the production of the mycotoxin patulin in fruit juices, as well as byssochlamic acid and mycophenolic acid.
[3] First described by Swedish botanist Richard Westling in 1909,[4] it contained teleomorph forms of the genus Paecilomyces, traditionally covering anamorphic forms.
With the adaptation of the "one fungus : one name" rule, Byssochlamys is considered a synonym of Paecilomyces.
The database Mycobank lists 9 legitimate species names, most of which are now considered to belong in the genus Paecilomyces.