edited by R.T. Becker, Wesztfälische Wilhelms-Universität, Germany, P. Königshof, Forschungsinstitut und Naturmuseum Senckenberg, Germany, and C.E. Brett, University of Cincinnati, USA
edited by J. Halla, University of Helsinki, Finland, M.J. Whitehouse, Swedish Museum of Natural History, Sweden, T. Ahmad, Jamia Millia Islamia, India, and Z. Bagai, University of Botswana, Botswana