With this issue we mark publication of the 75th volume of the Journal of Paleontology, and celebrate the occasion with a series of review articles on the systematics of major groups of fossils. Instructions to authors were very broad: we suggested consideration of the history of study, current problems, and future directions, but otherwise left authors to focus their reviews as they saw fit. We hoped in this way, with a mix of traditions and approaches, to fashion a general overview of the systematics of fossil organisms as practiced today. With the enthusiastic efforts of the contributors, I think...

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