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Research Activities:
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My main research interests are in the
origin, evolution, and diversification of early vertebrates,
particularly agnathans (jawless vertebrates). My work has been
concentrated in the Late Silurian through Devonian and I have documented
faunas around the Old Red Sandstone Continent from eastern Europe and
Spitzbergen, across the Canadian arctic, through western North America,
and down to Mexico. Research projects are continuing in all those areas
as I develop biostratigraphic correlations and study evolutionary
relationships. In addition my position as the de facto invertebrate
paleontologist in the department has led me into projects on trace
fossils in the Cambrian and Permian and a long term study of the
invertebrate faunas of the Pennsylvanian in Arizona. |
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