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Paleontology, Arthropoda, Crustacea, Branchiopoda, Trilobita
United States

Biography

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. In 2016, he was awarded the WIU Provost’s Excellence Award for Teaching with Technology. During the summer of 2019, he moved to Fredonia to teach in the Geology & Environmental Sciences Department at SUNY Fredonia. He continues to study both the fossil record of trilobites and early crustaceans. In the spring of 2022, he was awarded the William T. and Charlotte N. Hagen Young Scholar/Artist award at SUNY Fredonia for his outstanding record of scholarship. He has led two separate teams (one at WIU and another at SUNY Fredonia) that have received National Science Foundation grants for scanning electron microscopes. He has over 40 published peer-reviewed papers and book chapters and over 90 conference presentations. He has mentored the research projects of 40 students. He continues to study both the fossil record of trilobites and early crustaceans.

Activities

Employment (2)

SUNY Fredonia: Fredonia, NY, US

2019-08-05 to present | Associate Professor (Geology and Environmental Sciences)
Employment
Source: Self-asserted source
Thomas Hegna

Western Illinois University: Macomb, IL, US

2011-08-01 to 2019-05-15 | Associate Professor (Geology)
Employment
Source: Self-asserted source
Thomas Hegna

Education and qualifications (3)

Yale University: New Haven, CT, US

2006-08 to 2012-05 | Ph.D (Geology & Geophysics)
Education
Source: Self-asserted source
Thomas Hegna

University of Iowa: Iowa City, IA, US

2004-08 to 2006-12 | M.S. (Geoscience)
Education
Source: Self-asserted source
Thomas Hegna

University of Iowa: Iowa City, Iowa, US

2000-08 to 2004-05 | B.S. (Geoscience)
Education
Source: Self-asserted source
Thomas Hegna

Professional activities (8)

Geological Society of America: Boulder, US

Regular
Membership
Source: Self-asserted source
Thomas Hegna

The Crustacean Society: Herndon, US

2007 to present | Regular
Membership
Source: Self-asserted source
Thomas Hegna

Paleontological Society: Boulder, US

2001 to present | Regular
Membership
Source: Self-asserted source
Thomas Hegna

Palaeontological Association: Durham, GB

2001 to present | Regular
Membership
Source: Self-asserted source
Thomas Hegna

SUNY Fredonia: Fredonia, US

2024 | Chancellor’s Awards for Excellence for Scholarship
Distinction
Source: Self-asserted source
Thomas Hegna

SUNY Fredonia: Fredonia, US

2022 | William T. and Charlotte N. Hagan Young Scholar Award
Distinction
Source: Self-asserted source
Thomas Hegna

Western Illinois University: Macomb, US

2016 | Provost’s Excellence Award for Teaching with Technology
Distinction
Source: Self-asserted source
Thomas Hegna

Western Illinois University: Macomb, US

2016 | College of Arts and Sciences’ Teaching with Technology Award
Distinction
Source: Self-asserted source
Thomas Hegna

Funding (2)

MRI: Acquisition of an SEM-EDS system to further multidisciplinary scientific inquiry and discovery in Western New York

2022-09-01 to 2025-08-31 | Grant
Directorate for Geosciences (Alexandria, US)
GRANT_NUMBER: 2216215
Source: Self-asserted source
Thomas Hegna via DimensionsWizard

MRI: Acquisition of an SEM-EDS System: Advancing Scientific Discovery and Student Scientific Inquiry in Rural Illinois

2017-09-01 to 2020-08-31 | Grant
Directorate for Geosciences (Alexandria, US)
GRANT_NUMBER: 1726355
Source: Self-asserted source
Thomas Hegna via DimensionsWizard

Works (34)

Revision of Lower Devonian clam shrimp (Branchiopoda, Diplostraca) from the Rhenish Massif (Eifel, SW-Germany), and the early colonization of non-marine palaeoenvironments

Palaeobiodiversity and Palaeoenvironments
2024-09 | Journal article
Contributors: Markus J. Poschmann; Thomas A. Hegna; Timothy I. Astrop; René Hoffmann
Source: check_circle
Crossref

A new genus and species of ?parthenogenic anostracan (Pancrustacea, Branchiopoda, ?Thamnocephalidae) from the Lower Cretaceous Koonwarra Fossil Bed in Australia

Alcheringa
2022 | Journal article
EID:

2-s2.0-85127231209

Part of ISSN: 17520754 03115518
Contributors: Van Houte, E.; Hegna, T.A.; Butler, A.D.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier
grade
Preferred source (of 2)‎

A redescription of the clam shrimp, Orthestheria shupei (Stephenson, in Stephenson & Stenzel, 1952) comb. nov., from the Cenomanian (Cretaceous) of Texas

Cretaceous Research
2021 | Journal article
EID:

2-s2.0-85105347403

Part of ISSN: 1095998X 01956671
Contributors: Hegna, T.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

<strong>Amphipoda from the Late Neogene of Shanxi, China</strong>

Palaeoentomology
2021-02-26 | Journal article
Contributors: YUN-FENG WEI; AI-GUAN DONG; DI-YING HUANG; YAN-WEI DU; THOMAS A. HEGNA; XIN-NENG LIAN; DENIS AUDO
Source: check_circle
Crossref

A new fossil talitrid amphipod from the lower early Miocene Chiapas amber documented with microCT scanning

Journal of South American Earth Sciences
2020 | Journal article
EID:

2-s2.0-85076557754

Part of ISSN: 08959811
Contributors: Hegna, T.A.; Lazo-Wasem, E.A.; Serrano-Sánchez, M.D.L.; Barragán, R.; Vega, F.J.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Do the clothes make the thylacocephalan? A detailed study of Concavicarididae and Protozoeidae (?Crustacea, Thylacocephala) carapace micro-ornamentation

Journal of Systematic Palaeontology
2020 | Journal article
EID:

2-s2.0-85078069798

Part of ISSN: 14780941 14772019
Contributors: Broda, K.; Rak, Š.; Hegna, T.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

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 | Journal article
EID:

2-s2.0-85090643497

Part of ISSN: 1810522X 10215506
Contributors: Christopher Rogers, D.; Hegna, T.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Raman spectroscopic analysis of the composition of the clam-shrimp carapace (Branchiopoda: Laevicaudata, Spinicaudata, Cyclestherida): A dual calcium phosphatecalcium carbonate composition

Journal of Crustacean Biology
2020 | Journal article
EID:

2-s2.0-85100028062

Part of ISSN: 1937240X 02780372
Contributors: Hegna, T.A.; Czaja, A.D.; Rogers, D.C.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier
grade
Preferred source (of 2)‎

The Devonian-Cretaceous fossil record of “conchostracans” of Africa and their paleobiogeographic relationships with other Gondwanan faunas

Journal of African Earth Sciences
2020 | Journal article
EID:

2-s2.0-85073949046

Part of ISSN: 18791956 1464343X
Contributors: Gallego, O.F.; Monferran, M.D.; Stigall, A.L.; Zacarías, I.A.; Hegna, T.A.; Jiménez, V.C.; Bittencourt, J.S.; Li, G.; Barrios Calathaki, H.G.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

The fossil record of the clam shrimp (Crustacea; branchiopoda)

Zoological Studies
2020 | Journal article
EID:

2-s2.0-85090691824

Part of ISSN: 1810522X 10215506
Contributors: Hegna, T.A.; Astrop, T.I.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

The world’s first clam shrimp symposium: Drawing paleontology and biology together

Zoological Studies
2020 | Journal article
EID:

2-s2.0-85090686102

Part of ISSN: 1810522X 10215506
Contributors: Hegna, T.A.; Christopher Rogers, D.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

The Weeks Formation Konservat-Lagerstätte and the evolutionary transition of Cambrian marine life

Journal of the Geological Society
2018 | Journal article
EID:

2-s2.0-85053126895

Part of ISSN: 00167649
Contributors: Lerosey-Aubril, R.; Gaines, R.R.; Hegna, T.A.; Ortega-Hernández, J.; Van Roy, P.; Kier, C.; Bonino, E.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier
grade
Preferred source (of 2)‎

Understanding biomineralization in the fossil record

Earth-Science Reviews
2018 | Journal article
EID:

2-s2.0-85042261243

Part of ISSN: 00128252
Contributors: Pérez-Huerta, A.; Coronado, I.; Hegna, T.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Pyritized in situ trilobite eggs from the ordovician of New York (lorraine group): Implications for trilobite reproductive biology

Geology
2017 | Journal article
EID:

2-s2.0-85014129663

Part of ISSN: 19432682 00917613
Contributors: Hegna, T.A.; Martin, M.J.; Darroch, S.A.F.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

The phylogeny of fossil whip spiders

BMC Evolutionary Biology
2017 | Journal article
EID:

2-s2.0-85018480948

Part of ISSN: 14712148
Contributors: Garwood, R.J.; Dunlop, J.A.; Knecht, B.J.; Hegna, T.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Epilogue to the tale of the Triassic amphipod: Rosagammarus McMenamin, Zapata and Hussey, 2013 is a decapod tail (Luning Formation, Nevada, USA)

Journal of Crustacean Biology
2016 | Journal article
EID:

2-s2.0-84976873494

Part of ISSN: 1937240X 02780372
Contributors: Starr, H.W.; Hegna, T.A.; McMenamin, M.A.S.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Squilloides Tchindonova and Tchesunov, 1993 is a spelaeogriphacean, not an isopod

Journal of Crustacean Biology
2016 | Journal article
EID:

2-s2.0-84994158238

Part of ISSN: 1937240X 02780372
Contributors: Hegna, T.A.; Ahyong, S.T.; Wilson, G.D.F.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Mesozoic sedimentary cover sequences of the Congo Basin in the Kasai region, Democratic Republic of Congo

Geology and Resource Potential of the Congo Basin
2015 | Book
EID:

2-s2.0-84944244905

Contributors: Roberts, E.; Jelsma, H.A.; Hegna, T.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Phylogenetic relationships between living and fossil spinicaudatan taxa (branchiopoda spinicaudata): Reconsidering the evidence

Journal of Crustacean Biology
2015 | Journal article
EID:

2-s2.0-84924754185

Contributors: Astrop, T.I.; Hegna, T.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

The aquatic and semiaquatic biota in Miocene amber from the Campo LA Granja mine (Chiapas, Mexico): Paleoenvironmental implications

Journal of South American Earth Sciences
2015 | Journal article
EID:

2-s2.0-84934292034

Contributors: Serrano-Sánchez, M.D.L.; Hegna, T.A.; Schaaf, P.; Pérez, L.; Centeno-García, E.; Vega, F.J.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

The oldest notostracan (Upper Devonian Strud locality, Belgium)

Palaeontology
2015 | Journal article
EID:

2-s2.0-84928166909

Contributors: Lagebro, L.; Gueriau, P.; Hegna, T.A.; Rabet, N.; Butler, A.D.; Budd, G.E.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Thylacocephalans

Geology Today
2015 | Other
EID:

2-s2.0-84929666055

Contributors: Broda, K.; Hegna, T.A.; Zatoń, M.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Arthropod appendages from the weeks formation Konservat-Lagerstätte: New occurrences of anomalocaridids in the cambrian of Utah, USA

Bulletin of Geosciences
2014 | Journal article
EID:

2-s2.0-84901285872

Contributors: Lerosey-Aubril, R.; Hegna, T.A.; Babcock, L.E.; Bonino, E.; Kier, C.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

First mesozoic thylacocephalans (Arthropoda, ?Crustacea; Cretaceous) in the Western Hemisphere: New discoveries from the Muhi Quarry Lagerstätte

Journal of Paleontology
2014 | Journal article
EID:

2-s2.0-84900014780

Contributors: Hegna, T.A.; Vega, F.J.; González-Rodríguez, K.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Testing the phylogenetic position of Cambrian pancrustacean larval fossils by coding ontogenetic stages

Cladistics
2014 | Journal article
EID:

2-s2.0-84904462975

Contributors: Wolfe, J.M.; Hegna, T.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Is Strudiella a Devonian insect?

Nature
2013 | Journal article
EID:

2-s2.0-84874144366

Contributors: Hörnschemeyer, T.; Haug, J.T.; Bethoux, O.; Beutel, R.G.; Charbonnier, S.; Hegna, T.A.; Koch, M.; Rust, J.; Wedmann, S.; Bradler, S. et al.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Original spotted patterns on middle devonian phacopid trilobites from western and central New York

Geology
2013 | Journal article
EID:

2-s2.0-84876807455

Contributors: McRoberts, C.A.; Hegna, T.A.; Burke, J.J.; Stice, M.L.; Mize, S.K.; Martin, M.J.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

The correct authorship of the taxon name 'Arthropoda'

Arthropod Systematics and Phylogeny
2013 | Journal article
EID:

2-s2.0-84887600527

Contributors: Hegna, T.A.; Legg, D.A.; Møller, O.S.; Van Roy, P.; Lerosey-Aubril, R.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Controls on gut phosphatisation: The trilobites from the weeks formation Lagerstätte (Cambrian; Utah)

PLoS ONE
2012 | Journal article
EID:

2-s2.0-84858188754

Contributors: Lerosey-Aubril, R.; Hegna, T.A.; Kier, C.; Bonino, E.; Habersetzer, J.; Carré, M.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Decoupling elongation and segmentation: Notch involvement in anostracan crustacean segmentation

Evolution and Development
2012 | Journal article
EID:

2-s2.0-84863572218

Contributors: Williams, T.; Blachuta, B.; Hegna, T.A.; Nagy, L.M.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Inferring internal anatomy from the trilobite exoskeleton: The relationship between frontal auxiliary impressions and the digestive system

Lethaia
2011 | Journal article
EID:

2-s2.0-79955544952

Contributors: Lerosey-Aubril, R.; Hegna, T.A.; Olive, S.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Branchinecta brushi n. sp. (Branchiopoda: Anostraca: Branchinectidae) from a volcanic crater in northern chile (antofagasta province): A new altitude record for crustaceans

Journal of Crustacean Biology
2010 | Journal article
EID:

2-s2.0-77953601541

Contributors: Hegna, T.A.; Lazo-Wasem, E.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Photography of soft-bodied crustaceans via drying, whitening, and splicing

Journal of Crustacean Biology
2010 | Journal article
EID:

2-s2.0-77953603156

Contributors: Hegna, T.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

The function of forks: Isotelus-type hypostomes and trilobite feeding

Lethaia
2010 | Journal article
EID:

2-s2.0-77953417977

Contributors: Hegna, T.A.
Source: Self-asserted source
Thomas Hegna via Scopus - Elsevier

Peer review (3 reviews for 3 publications/grants)

Review activity for Cretaceous research. (1)
Review activity for Journal of South American earth sciences. (1)
Review activity for Trends in ecology & evolution. (1)