#  Paleobiology Seminar: Lauren Sallan 

 



####  calendar\_today Date and Time 

 **April 3, 2018** 

 02:00PM - 02:00PM EDT 

####  pin\_drop Location 

 **Haller Hall (Geology Museum 102)**  



 

 



 

 **Lauren Sallan**

 Martin Meyerson Assistant Professor in Interdisciplinary Studies  
Earth and Environmental Science  
University of Pennsylvania

 **The Rise and Fall of Fishes: How Ecology and Mass Extinction Shaped Vertebrate Biodiversity**

 Vertebrates (55000+ species) originated as "fishes" some 540 million years ago. However, their path to numerical superiority was long and unlikely; they are marginal or missing from productive ecosystems during the Cambrian Explosion and Great Ordovician Biodiversification Event. Here I show how quantitative paleobiology can reveal the ecological factors and environmental events during the mid-Paleozoic allowed vertebrate to become essential components of marine biodiversity, and eventually caused a initially-stable global fish fauna to be replaced by the "primitive" fishes we see today.



 

 



 

 See also:- [ 2018 ](/geobiologyehap/2018)
 
 

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