Dr. Thomas Hegna

Dr. Thomas Hegna
Dr. Thomas Hegna
Assistant Professor

Jewett Hall
716-673-3303
Thomas.Hegna@fredonia.edu

Ph.D., Yale University

Personal Website

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

Professional Memberships

  • The Crustacean Society
  • Palaeontological Association
  • Paleontological Society

Intellectual Contributions

  • ""Branchiopoda." Pages xx-xx. 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 xx-xx. 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).
  • "The Fossil Record of Clam Shrimp (Crustacea; Branchiopoda)," Zoological Studies (2020).
  • "Raman spectroscopic analysis of the composition of clam shrimp (Laevicaudata, Spinicaudata, Cyclestherida) carapaces," Journal of Crustacean Biology (N/A).
  • "The clam shrimp genus Nemestheria in North America (Crustacea: Branchiopoda)," Cretaceous Research (N/A).
  • "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).

Presentations

  • "Remarkable lophotrochozoans from the Weeks Formation Konservat-Lagerstätte," 59th Annual Meeting of the Palaeontological Association (2015).
  • "Pyritized in situ trilobite eggs from the Ordovician of New York (Lorraine Group): Implications for trilobite reproductive biology," Geological Society of America Annual Meeting (2015).
  • "Possible minute branchiopod mandibles (?Cladocera) from the lake deposits (Ciniza Lake) in the Upper Triassic Chinle Formation (New Mexico) and the temporal record of small carbonaceous fossils (SCFs).," Geological Society of America Annual Meeting, (2015).
  • "Epilogue to the tale of the Triassic Amphipod: Rosagammarus is a decapod tail (Luning Formation, Nevada)," North Central Section Meeting of the Geological Society of America (2015).
  • "Mississippian bryozoans preserved in glauconite (Illinois, USA)," North Central Section Meeting of the Geological Society of America (2015).
  • "Possible trilobite-in-trilobite sheltering behavior (Silurian Gun River Formation, Anticosti Island, Canada)," North Central Section Meeting of the Geological Society of America (2015).
  • "Pyritized in situ trilobite eggs from the Ordovician of New York (Lorraine Group): Implications for trilobite reproductive biology," North Central Section Meeting of the Geological Society of America (2015).
  • "Silicification of trilobites in the Cambrian Weeks Formation (House Range, Utah)," North Central Section Meeting of the Geological Society of America (2015).
  • ""Horse collars" are for balancing? The function of an enigmatic Devonian fossil re-examined with 3D visualization.," 10th North American Paleontological Convention (2014).
  • "Composition and significance of the Weeks Formation Fauna (Guzhangian; Utah, USA)," 57th Annual Meeting of the Palaeontological Association (2013).
  • "The earliest head-shield-bearing Calmanostraca found in the Upper Devonian Strud Lagerstätte, Belgium.," 57th Annual Meeting of the Palaeontological Association (2013).
  • "First Mesozoic Thylacocephalans (Arthropoda, ?Crustacea; Cretaceous) in the western hemisphere: New discoveries from the Muhi Quarry Lagerstätte, México," Geological Society of America Annual Meeting (2013).
  • "Not quite frozen in time: windows into the internal taphonomy of fossils in amber via microCT-scan technology," Geological Society of America Annual Meeting (2013).
  • "The Weeks Formation Lagerstätte (Cambrian; Utah, USA): a unique insight into the evolution of soft-bodied metazoans during the late Cambrian.," Geological Society of America Annual Meeting (2013).
  • "The Carboniferous whip spider Graeophonus (Arachnida: Amblypygi): New data on pedipalp evolution.," Geological Society of America, Annual Meeting (2013).
  • "Inside the Cambrian explosion: the diversity of midgut morphologies in Cambrian arthropods," 56th Annual Meeting of the (2012).
  • "Testing the phylogenetic position of Cambrian 'Orsten' pancrustacean larval stages using semaphoront coding.," 56th Annual Meeting of the Palaeontological Association (2012).
  • "The interpretation of a new enigmatic arthropod from the Cambrian Weeks Formation, Utah," 56th Annual Meeting of the Palaeontological Association (2012).
  • "Exploring the preservation of digestive structures of fossil arthropods: The phosphatisation of trilobite guts in the Weeks Formation Lagerstätte (Cambrian; Utah)," The 17th Field Conference of the Cambrian Stage Subdivision Working Group, International Subcommission on Cambrian Stratigraphy and Celebration of the 30th Anniversary of the Discovery of the Kaili Biota (2012).
  • "Morphology and taphonomy of trilobite guts: recent developments and perspectives. ," The 5th Conference on Trilobites and their relatives (2012).