1. Institute of Parasitic Diseases, 11455 East Via Linda, 2-419, Scottsdale, Arizona 85259, U.S.A. (e-mail: nyrubtsova@gmail.com)
2. Department of Biology, 1114 WIDB, Brigham Young University, Provo, Utah 84602, U.S.A. (e-mail: richard_heckmann@byu.edu)