1. Yukon Palaeontology Program, Government of Yukon, PO Box 2703 L2A, Whitehorse, YT, Canada, Y1A 2C6
2. Canadian Museum of Nature (Palaeobiology), PO Box 3443, Stn ‘D’, Ottawa, ON, Canada, K1P 6P4
3. Paleotec Services, 1–574 Somerset Street W, Ottawa, ON, Canada, K1R 5K2
4. Research Laboratory for Archaeology, University of Oxford, Dyson Perrins Building, South Parks Road, Oxford OX1 3QY, UK