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Fossil specimens lay against a ruler on a black background

Jack Kallmeyer Invertebrate Paleontology Collection

The Jack Kallmeyer Invertebrate Paleontology Collection is a core research collection that consists of approximately 15,000 cataloged and georeferenced species, primarily of shallow marine invertebrate fossils dating to the Late Ordovician Period (~450 million years ago) from southwestern Ohio and surrounding states. This collection includes representatives of all aspects of the shallow marine ecosystem including trilobites, brachiopods, bryozoans, corals, mollusks, and echinoderms.

The collection was assembled over thirty years by a single collector, Jack Kallmeyer, and is characterized by extremely high quality locality and stratigraphic information.  Due to the high quality of associated data, this is not only the fourth largest Ordovician collection in the state of Ohio, but also among the very most valued in terms scientific data. The Kallmeyer collection is curated by Professor Alycia Stigall and used by Ohio University researchers, including undergraduate and graduate students, for ongoing work into the evolution and ecology of Ordovician ecosystems.  The specimen data are managed in a Specify 6.1 database, and data are publicly available via iDigBio and GBIF portals, as well as the Ordovician Atlas web portal and the Digital Atlas of Ancient Life mobile app.

Collection of fossils in a drawer
Rocks and fossils set out on a table