1. University of Calgary; 3330 Hospital Dr. NW, Calgary; AB; Canada T2N 4N1
2. Department of Environment, Government of Nunavut; Box 377, Kugluktuk; NU; Canada X0B 0E0
3. US National Parasite Collection; 10300 Baltimore Avenue, Beltsville; MD 20705-2350; USA
4. University of Utrecht; Box 80125, 3508 TC Utrecht; Netherlands