Pachykytospora is a small genus of fungi in the family Polyporaceae. Species in the cosmopolitan genus cause white rot. There are about 10 species in the genus, with newest member described from European Russia in 2007. Pachykytospora species have fruit bodies that are resupinate (growing flat on the substrate surface), with light brown tubes. They are characterized by their uneven, ellipsoid spores, and the Polyporus-like skeleton-binding hyphae.