#  Collections 

 



Stephanie Pierce is the Curator in Vertebrate Paleontology at the Museum of Comparative Zoology. The Stephanie E. Pierce laboratory utilizes the Vertebrate Paleontology collections in their research, with a focus on major morphological and ecological transitions in vertebrate evolution through an examination of the fossil record. The collection is searchable online through [MCZbase](https://mczbase.mcz.harvard.edu/SpecimenSearch.cfm?collection_id=1) as well as through [VertNet](http://portal.vertnet.org/search), [iDigBio](https://portal.idigbio.org/) and [GBIF](https://www.gbif.org/).

## **For more information, please visit the** [**Vertebrate Paleontology Collections**](https://mcz.harvard.edu/vertebrate-paleontology)

   ![mcz-3667_hesperocyon_gregarius.jpg](/sites/g/files/omnuum5771/files/styles/hwp_1_1__720x720_scale/public/spierce/files/mcz-3667_hesperocyon_gregarius.jpg?itok=ZkmZQ_1N) 

 

*Hesperocyon gregarius*  
Middle oligocene Period, Lower Brule Formation, Converse County, Wyoming, MCZ 3667