1. Assistant Research Professor, Oklahoma Biological Survey, Univ. of Oklahoma, Norman, OK 73019; Dept. of Biological Sciences, Idaho State Univ., Pocatello, ID 83209 (corresponding author).
2. Professor, Oklahoma Biological Survey, Dept. of Biology and Ecology and Evolutionary Biology Graduate Program, Univ. of Oklahoma, Norman, OK 73019.
3. Research Scientist, Dept. of Applied Research and Agricultural Extension, Madrid Institute for Rural, Agricultural and Food Research and Development (IMIDRA), 28800 Alcala de Henares, Spain.
4. Associate Professor, Dept. of Geography, Texas State Univ., San Marcos, TX 78666.
5. Assistant Professor, Dept. of Biological Sciences, Univ. of Alabama, Tuscaloosa, AL 35847.