1. Delaware Valley University, Department of Biology, Doylestown, Pennsylvania 18901 (United States) and Academy of Natural Sciences of Drexel University, Department of Vertebrate Biology, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103
2. Academy of Natural Sciences of Drexel University, Department of Vertebrate Biology, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103 (United States) ebd29@drexel.edu
3. Swarthmore College, Department of Biology, 500 College Avenue, Swarthmore, Pennsylvania 19081 (United States) nathklo@gmail.com
4. Academy of Natural Sciences of Drexel University, Department of Vertebrate Biology, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania 19103 (United States) enc44@drexel.edu
5. University of Chicago, Department of Organismal Biology and Anatomy, 1027 E. 57th Street, Chicago, Illinois 60637 (United States) nshubin@uchicago.edu