
Contents
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Previous Hypotheses of Phylogenetic Relationships of Plesiosminthus and Sicista Previous Hypotheses of Phylogenetic Relationships of Plesiosminthus and Sicista
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Plesiosminthus and Sicista Fossils from Asia Plesiosminthus and Sicista Fossils from Asia
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Cladistical Analysis Cladistical Analysis
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Results Results
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Discussion Discussion
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North American Synonyms of Plesiosminthus and Sicista North American Synonyms of Plesiosminthus and Sicista
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Dispersal Events of Plesiosminthus and Sicista Dispersal Events of Plesiosminthus and Sicista
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Geographic Ranges of North American Sicistines Geographic Ranges of North American Sicistines
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Conclusion Conclusion
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Acknowledgments Acknowledgments
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References References
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Appendix 1 Description of Characters and Character States Employed in the Phylogenetic Analysis of Plesiosminthus, Megasminthus, and Sicista Appendix 1 Description of Characters and Character States Employed in the Phylogenetic Analysis of Plesiosminthus, Megasminthus, and Sicista
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Appendix 2 Character Matrix for Phylogenetic Analysis of Plesiosminthus, Megasminthus, and Sicista Appendix 2 Character Matrix for Phylogenetic Analysis of Plesiosminthus, Megasminthus, and Sicista
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Appendix 3 Museum Specimens Examined for This Study Appendix 3 Museum Specimens Examined for This Study
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30 Intercontinental Dispersals of Sicistine Rodents (Sicistinae, Dipodidae, Rodentia) Between Eurasia and North America
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Published:May 2013
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Abstract
This chapter investigates the intercontinental dispersals of sicistine rodents (Sicistinae, Dipodidae, Rodentia) between Eurasia and North America. The Sicistinae is a subfamily of the superfamily Dipodoidea, which includes jerboas, jumping mice, and birch mice. Of all living and fossil sicistines, only Plesiosminthus- and Sicista-like mice are known from the Great Plains of North America in Early Oligocene to Late Miocene and early Pleistocene sediments. This chapter presents the results of a study that seeks to refine the phylogenetic relationships of Plesiosminthus and Sicista. The chapter begins with an overview of Plesiosminthus and Sicista fossils from Asia and proceeds by discussing the phylogenetic results of a cladistic analysis indicating that North American Schaubeumys and Macrognathomys are synonymous with Plesiosminthus and Sicista, respectively, and that Plesiosminthus and Sicista dispersed from Asia to North America.
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