Hannes Hertel is a German lichenologist and taxonomist and was Director of the State Herbarium in Munich, Germany 1992–2004.
His doctorate was awarded in 1967 for work on members of the lichen genus Lecidea that thrive on lime rich rocks and sites.
He and students that he supervised brought order and a critical review of the 1000 accepted and 4000 published names within the genus in the early 1970s.
Hertel made a particular effort to transcribe the detailed labels from Arnold's handwriting that was difficult to read and ensured this was published so that the collection could be more easily used by others.
Several genera have been named after Hertel, including Hertelidea Printzen & Kantvilas (2004),[6] Herteliana P.James (1980); and Hertella Henssen (1985).