Byssochlamys
| Byssochlamys | |
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| Genus: | Byssochlamys Westling (1909) | 
| Type species | |
| Byssochlamys nivea Westling (1909) | |
Byssochlamys is a former genus of fungi in the Trichocomaceae family, containing teleomorph forms of Paecilomyces. Several species of the genus Byssochlamys were well known to be associated with food spoilage, especially acidic heat-processed foods. A health concern was the production of the mycotoxin patulin in fruit juices, as well as byssochlamic acid and mycophenolic acid.