Graham L. Williams,^1,* Sarah P. Damassa,^2,** Robert A. Fensome,^1,***,**** G. Raquel Guerstein<sup>3,*****

1</sup>aNatural Resources Canada, Geological Survey of Canada (Atlantic), Bedford Institute of Oceanography
²b119 South Street, Rockport, Massachussetts, USA 01966;
³cLaboratorio de Palinologia INGEOSUR, Departamento de Geologia, Universidad Nacional del Sur, Avda.

^*Graham Williams'S main field of interest is mesozoic-cenozoic palynostratigraphy of offshore eastern Canada, including arctic areas. His interest in dinoflagellates has led to studies of these palynomorphs in both hemispheres, including the deep ocean basins. After seven years at Pan American Petroleum Corporation (for anyone who remembers that far back), Graham joined the Geological Survey of Canada in 1971. He has spent the last 43 years at Bedford Institute of Oceanography in Nova Scotia, where he has the good fortune to work with some outstanding colleagues.
^**Sarah Pierce Damassa, in a previous existence, was a palaeogene dinoflagellate specialist, having studied with Bill Evitt, Al Loeblich and Helen Loeblich. She then worked as a consulting palynologist for around fifteen years. A career change then led her to Lexington, Massachusetts, where she taught Environmental Earth Science to ninthgrade students for twenty years. She has also coached the school's National Ocean Science Bowl team for twelve years. Thanks to her co-authors, she has managed to retain a tenuous toehold in the world of fossil dinoflagellates, and has thoroughly enjoyed working with them on the Wetzeliella paper.
^***CONTACT Robert A. Fensome rob.fensome@canada.ca
^****Rob Fensome, like Graham, works for the Geological Survey of Canada in their Atlantic Division at the Bedford Institute of Oceanography, Dartmouth, Nova Scotia. During his 33-year tenure at GSC, Rob has focussed mainly on the mesozoiccenozoic dinoflagellate cysts from off Canada's east coast, but is now venturing into projects involving assemblages from northwestern and Arctic Canada. While biostratigraphic and paleoenvironmental studies justify his paycheck, he also has a strong interest in dinoflagellate evolution.
^*****G. Raquel Guerstein is a professor at the Universidad Nacional del Sur in Bahıa Blanca, Argentina, and a scientific researcher of the Consejo Nacional de Investigaciones Cientıficasy Tecnicas (Conicet). She graduated in geological oceanography from the Universidad Nacional del Sur, Argentina and received her PhD degree in geology in 1987 from the same university. She studies organic-walled dinoflagellate cyst assemblages from various sedimentary basins in Argentina. Her research interests are focused on the climatological and paleoceanographical evolution of the Southern and South Atlantic oceans during the transition from greenhouse to icehouse conditions during the Cenozoic.