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Alycia L. Stigall

Alycia L. Stigall, portrait
Adjunct Professor

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Ph.D., 2004, University of Kansas

M.S., 2001, University of Kansas

B.S., 1999, The Ohio State University (Geological Sciences)

B.S., 1999, The Ohio State University (Biology)



  • Macroevolution, speciation, and invasive species
  • Quantitative paleobiogeography and paleoecology
  • Phylogenetic systematics of articulated brachiopods and crustaceans
  • Great Ordovician Biodiversification Event
  • Late Devonian Biodiversity Crisis
  • Late Ordovician Richmondian Invasion
  • Jurassic lakes of Gondwana

Research Interests

Paleobiology in the Stigall Lab

My research explores the influence of biogeography and paleoecology on macroevolutionary phenomena, principally speciation and cladogensis. I am particularly interested in elucidating the long-term impacts of species invasions and the relationship between speciation mode and biodiversity expansions and declines. I utilize a variety of quantitative approaches, such as phylogenetic reconstruction and ecological niche modeling, to integrate previously disparate areas of paleontological investigation within a comprehensive evolutionary framework. Articulated brachiopods are the most commonly employed model taxa within this work.

A secondary line of research involves taxonomic and paleoecological analyses of spinicaudatan crustaceans, a group restricted to freshwater lake environments.

Recent projects have focused on the Great Ordovician Biodiversification Event, the Late Ordovician Richmondian Invasion, the Late Devonian Biodiversity Crisis, and Jurassic lakes of Gondwana. Primary field locations range from Ohio and adjacent states, to Oklahoma, Estonia, Namibia, and Antarctica. This research has been supported by the National Science Foundation, National Geographic, and the American Chemical Society’s Petroleum Research Fund.

I also contribute to paleontological database development through iDigBio and collaborate with faculty in the Ohio University Department of Teacher Education to develop workshops, lesson plans, and outreach activities to promote STEM education in the rural Appalachian region and underrepresented groups more broadly. Outreach and educational resources developed are available via the Ordovician Atlas website and the free Digital Atlas of Ancient Life app.

Courses Taught

  • GEOL 2210: Earth and Life History
  • GEOL 3/5410: Principles of Paleontology
  • GEOL 4/5430: Paleobiogeography
  • GEOL 4/5480: Paleoecology
  • GEOL 4/5540 Carbonate Depositional Systems
  • GEOL 4/5460: Earth Systems Evolution


2015-present, Professor

2009-2015, Associate Professor

2004-2009, Assistant Professor

2004, Post-doctoral Researcher, The Ohio State University

Selected Publications

Google Scholar Page

Recent Advisees' Master's Theses

  • Purcell, C. In progress. How did ecological niches evolve during Ordovician environmental change? A test using Laurentian brachiopods?
  • Censullo, S.M., 2020. Did alternating dispersal and vicariance contribute to increased biodiversification during the Great Ordovician Biodiversification Event? A phylogenetic test using brachiopods
  • Epa, Y.R., 2017. Paleoecology of the freshwater gastropods from the late Oligocene Nsungwe Formation of Tanzania.
  • Perera, S.N. 2017. Hierarchical spatial patterns in paleocommunities of the Late Pennsylvanian Ames Limestone.
  • Trubovitz, S. 2016. Brachiopod diversity during the Great Ordovician Biodiversification Event in the Middle Ordovician Simpson Group (Oklahoma).