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If you are not a member and are visiting this web site, we hope that you will join us. Come to some of our meetings and visit with our members. We have excellent speakers, presentations, and socializing starting at 7 pm most first Mondays of the month (September to May) in Ricketson Auditorium at the Denver Museum of Nature and Science. There is no charge to attend the Society's meeting and hear the lecture.

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The doors to the west entrance of the museum will be opened until 7:30. After that they will be locked.

Monday, November 6
The early origin and evolution of turtles
Speaker: Tyler Lyson
Curator of Vertebrate Paleontology
Denver Museum of Nature & Science

Tyler LysonTyler grew up in Marmarth, North Dakota, and has been collecting fossils on his family's land for most of his life. He received his Ph.D. at Yale University under Dr. Jacques Gauthier. Tyler then went to the Smithsonian Institution to work with Dr. Kevin de Quieroz. He is currently a curator of vertebrate paleontology at the Denver Museum of Nature & Science.

Tyler's research interests are broad and include morphological evolution, systematics, and extinction patterns of reptiles. His primary interests are patterns of homology, phylogenetic origin of turtles, and the response of turtles to the K/PG extinction event approximately 66 mya that wiped out non-avian dinosaurs. He uses morphology and the fossil record to interpret the homology of the approximately 50 bones that make up the turtle shell. In addition, he uses morphology, the fossil record, and microRNAs to address the phylogenetic origin of turtles. His current research is focused on creating an evolutionary developmental model for the origin of the turtle shell and a critical analysis of the cardiovascular system of turtles.

Tyler's extensive field programs have also allowed him to publish on the extinction of the dinosaurs, dinosaur paleoecology, and the taphonomy of several mass death assemblages of turtles.