About the Authors

Eberhard Frey


Affiliation Staatliches Museum für Naturkunde Karlsruhe, Karlsruhe, Germany

Helmut Tischlinger

Affiliation Co-opted Scientist, Stammham, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Contributed reagents/materials/analysis tools: HT. Wrote the paper: EF HT. UV photography: HT. Preparation: HT. Figure composing, line drawing: EF. Writing initial text: EF.