Achorion is an obsolete genus of dermatophyte fungus.
The species previously belonging to genus Achorion have been moved to other genera. Some notable species include:
A. quinckeanum — now named Trichophyton quinckeanum, the species which causes favus in mice. A. schoenleinii — now named Trichophyton schoenleinii, or "Schönlein's tricophyton", the species which causes favus in humans. Other pathogenic fungi occasionally found in humans: A. arloingi, now called Aleurisma arloingi A. gypseum, now called Microsporum gypseum
Sources American Illustrated Medical Dictionary (Philadelphia and London, 1938)