Author Affiliations +
Bernd P. Freymann,1 Frank-Thorsten Krell2
1Community and Conservation Ecology Group aUniversity of Groningen, Postbox 11103 9700 CC Groningen, THE NETHERLANDS bernd.freymann@gmx.de
2Department of Zoology, Denver Museum of Nature & Science 2001 Colorado Blvd Denver, CO 80205-5798, U.S.A. frank.krell@dmns.org