John T.D. Caleb is an arachnologist who received his Ph.D. from the University of Madras. His research mainly focuses on the spider diversity, taxonomy and DNA barcoding. He has described 43 new spider species across India and has eighty four research papers on an extensive range of taxonomic research on Indian spiders. His passion towards the systematics and biogeography of salticids got him the “Herbert Levi Fund for Arachnological Research” (HLMFAR) in 2017 by the American Arachnological Society (AAS) for studying the Salticids of India. 

Pradeep M. Sankaran is an arachnologist with special interest in studying ground spiders. He has extensive field experience in the Western Ghats. Apart from studying spiders his research interests also include the taxonomy of millipedes. He has 30 new spider species to his credit and has fifty five research papers on both spiders and millipedes. He is currently associated with the Division of Arachnology, Sacred Heart College, Kerala.