A new species of Ariaspis (Agnatha, Heterostraci) from the Late Silurian of the Canadian Arctic

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ACKNOWLEDGMENTS

The authors thank Dr. E. J. Loeffler, University of Bristol, for making the material available for study and Dr. R. Thorsteinsson, GSC Calgary, for useful discussions. The authors also thank the reviewers of the manuscript for helpful comments. This work was supported by NSF grant DPP 89–21819.