Dr. Victor Fet is a Professor of Biology at Marshall University, West Virginia, USA. He was a co-editor of Biogeography and Ecology of Turkmenistan (Kluwer Academic Publishers, 1994) and authored dozens of research publications on animal biogeography, systematics and evolution. He is also one of the world’s leading experts on scorpions and one of the authors of the Catalog of Scorpions of the World (New York, 2000).
Dr. Alexi Popov is the Director of the National Museum of Natural History, Sofia, Bulgaria. He authored and co-authored 94 research publications on insect faunistics, taxonomy, ecology, and conservation. He served as a Secretary and/or the Member of the Editorial Board of Historia naturalis bulgarica, Acta entomologica bulgarica, and Journal of Neuropterology. In the project "Fauna Europaea", Dr. Popov leads the team of 30 entomologists working on the insects of Bulgaria.