Dr. Thomas Hegna

  Dr. Thomas Hegna, Ph.D

Dr. Thomas Hegna, Ph.D

Assistant Professor

Houghton Hall 118 Houghton Hall

(716) 673-3840

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Ph.D., Yale University

The Hegna Lab

Dr. Thomas Hegna grew up in western Iowa and attended the University of Iowa where he fell in love with invertebrate paleontology. He graduated in the spring of 2004 with honors and high distinction in Geoscience (B.S.) with minors in English and Philosophy.

Dr. Hegna stayed at the University of Iowa for his M.S., graduating in the fall of 2006 after completing a project on the systematics and phylogeny of a fauna of upper Cambrian trilobites. He then moved on to Yale University where he completed his thesis on branchiopod crustacean phylogeny and their fossil record in the spring of 2012. He taught at Western Illinois University from the fall of 2011 to the spring of 2019. During the summer of 2019, he moved to Fredonia to teach in the Geology Department at SUNY Fredonia. He continues to study both the fossil record of trilobites and early crustaceans.

Office Hours

Monday: 8:00-9:50
Wednesday: 8:00-9:50
Friday: 8:00-9:50

Research Interests

Arthropod evolution and fossilization

Awards and Honors

  • William T. and Charlotte N. Hagan Young Scholar/Artist Award, SUNY Fredonia (2022).

Professional Membership

  • The Crustacean Society
  • Palaeontological Association
  • Paleontological Society

Intellectual Contributions

  • "A new genus and species of ?parthenogenic anostracan (Crustacea, Branchiopoda, ?Thamnocephalidae) from the Cretaceous Koonwarra Fossil Beds in Australia," Alchergina (2022).
  • "Amphipoda from the Late Neogene of Shanxi, China," Palaeoentomology (2021).
  • "A redescription of the clam shrimp, Orthestheria shupei (Stephenson, in Stephenson & Stenzel, 1952) comb. nov., from the Cenomanian (Cretaceous) of Texas," Cretaceous Research (2021).
  • "Raman spectroscopic analysis of clam shrimp carapace composition (Laevicaudata, Spinicaudata, Cyclestherida): A dual calcium phosphate-calcium carbonate composition," Journal of Crustacean Biology (2020).
  • ""Branchiopoda." Pages 587-593. In K. de Queiroz, P. D. Cantino, and J. Gauthier (eds.) Phylonyms: a Companion to the PhyloCode.," Routledge Taylor and Francis Group (2020).
  • ""The Fossil Record of the Pancrustacea." Pages 21-52. In G. Poore and M. Thiel (eds.): Evolution and Biogeography, volume VIII of the series The Natural History of the Crustacea. ," Oxford University Press (2020).
  • "Fossil and Modern Clam Shrimp (Branchiopoda: Spinicaudata, Laevicaudata): The World’s First Clam Shrimp Symposium and a Celebration of Brian V. Timms," Zoological Studies (2020).
  • "Raman spectroscopic analysis of the composition of clam shrimp (Laevicaudata, Spinicaudata, Cyclestherida) carapaces: A dual calcium phosphate-calcium carbonate composition," Journal of Crustacean Biology (2020).
  • "The Fossil Record of Clam Shrimp (Crustacea; Branchiopoda)," Zoological Studies (2020).
  • "The world's first clam shrimp symposium: Drawing paleontology and biology together," Zoological Studies (2020).
  • "A new fossil talitrid amphipod from the Lower Early Miocene Chiapas amber documented with microCT scanning," Journal of South American Earth Sciences (2020).
  • "The Devonian-Cretaceous fossil record of "conchostracans" of Africa and their paleobiogeographic relationships with other Gondwanan faunas. ," Journal of African Earth Sciences (2020).
  • "Do the clothes make the thylacocephalan? A detailed study of Concavicarididae and Protozoeidae (?Crustacea, Thylacocephala) carapace micro-ornamentation," Journal of Systematic Palaeontology (2020).

Media Contributions

  • LiveScience (2022).


  • "The taxonomy of Orthestheria shupei (Stephenson, in Stephenson & Stenzel, 1952) from the Cenomanian (Cretaceous) of Texas," 64th Annual Meeting of the Palaeontological Association, Oxford, UK, Dec. 16-18 (2020).
  • "Lineage-thinking, or the conceptual non-necessity of species and its implications," Paleontological Research Institution’s Summer Symposium, August 2019. (2019).