Hieracium diaphanoides subsp. megalodon (Johanss.) Zahn is a synonym of Hieracium megalodon Dahlst. ex Johanss.

This name is a synonym of Hieracium megalodon Dahlst. ex Johanss..

The record derives from TICA which reports it as a synonym (record C7BE6DAD-B8DD-4837-B189-46808786BB40) with original publication details: "Zahn, in Engler, Pflanzenr. 76. 1921." 356 1921.