Published Papers
Email me for a pdf of any of the following papers.
Total: 44 published papers
In the pipe:
Hegna, T.A. and J. Luque. in preparation. The fossil record of the Peracarida. Journal of Crustacean Biology.
Hegna, T.A. & R. Lerosey-Aubril. in preparation. A new arthropod from the Cambrian Weeks Formation, Utah. Journal of Paleontology.
Hegna, T.A. In preparation. Walcott's unpublished plate.
Hegna, T.A.& E. Roberts. in preparation. New spinicaudatans (Crustacea: Branchiopoda: 'Conchostraca') from the Mesozoic of Zimbabwe and the phylogenetic context of fossil 'conchostracans'.
Hegna, T.A. & E. Roberts. in preparation. New spinicaudatans (Crustacea: Branchiopoda: 'Conchostraca') from Mesozoic drill cores in the Democratic Republic of Congo (formerly Zaire, Africa).
Hegna, T.A., M. Vrazo and B. Bogan. in revision. Notostracan taphonomy: Implications for stem-ward slippage and soft-bodied arthropod taphonomy.
Astrop, T.I., T.A. Hegna, & S.C. Weeks. in revision. Deciphering the structure and significance of the ‘conchostracan’ carapace (Branchiopoda: Spinicaudata, Laevicaudata, Cyclestheriida). Palaeontology.
Hegna, T.A. in preparation. New spinicaudatans (Crustacea: Branchiopoda: ‘Conchostraca’) from the Late Jurassic Morrison Formation of Colorado, USA.
Gallego, O.F. et al. in preparation. Systematic revision of clam shrimp (Crustacea: Branchiopoda: ?Spinicaudata) from the Newark Supergroup (Triassic-Jurassic, Culpeper Basin, USA).
Monferran, M.D., T.A. Hegna, O.F. Gallego, L.M. Sabater, F.L. Agnolin, F.E. Novas. in prep. A Jurassic spelaeogriphean from the La Matilde Formation of southern Argentina.
Monferran, M.D. T.A. Hegna, D.C. Rogers, & D.-Y. Huang. in prep. Revision of Daohugounaias cheni from the Middle Jurassic of China.
Hegna, T.A. & S.R. Losso. in prep. How to eat with a fork: Unprecedented post-antennal appendage differentiation in the trilobite Isotelus (Asaphida; Ordovician).
De los Rios-Escalante, P., D.C. Rogers, T.A. Hegna, O.F. Gallego, C. Esse, F. Correa-Araneda, D. Volosky Medina, M.D. Monferran. In preparation. A checklist of fossil large Branchiopoda (Notostraca, Spinicaudata and ?Cyclestherida) from Chile.
Wilson, G.D.F., T.A. Hegna, & T.-Y. Park. In preparation. A new Jurassic isopod from the Carapace Nunatak, Antarctica.
Hegna, T.A., P.K. Elsea*, & Voigt, S. In revision. Almatium gusevi from the Madygen Formation, Kyrgyzstan.
* denotes WIU undergraduate student
2024
51. Hegna, T.A., J. Bateman, & D.R. Blood. in preparation. Back in time through the end-Devonian mass extinction, western New York. GSA Fieldguide.
50. Bicknell, R.D.C., A.A. Klompmaker, & T.A. Hegna. In preparation. Early Cretaceous Archaeoniscus clusters shed light on fossil isopod morphology, paleoecology and taphonomy..
49. Laville, T. & T.A. Hegna. in preparation. Comment dater les roches à l'aide des conchostracés? In forthcoming "Histoire des crustacés."
48. Melim, L.A., T.A. Hegna, B.J. Bellott, J. Ortega-Hernández, & R. Lerosey-Aubril. in submission. Pyritized rod-shaped microbes, Permian, west Texas. Palaios.
47. Bicknell, R.D.C., P.M. Smith, A.A. Klompmaker, & T.A. Hegna. 2024. A new archaeostomatopod from the Pennsylvanian Wea Shale Member, Nebraska, USA. American Museum Novitates. in press.
46. Poschmann, M.J., T.A. Hegna, O. Emrich, J. Fischer, R.Hoffmann, T. Schindler & S. Voigt. accepted. Putative branchiopod and vertebrate eggs from the Remigiusberg Lagerstätte (Pennsylvanian-Permian boundary) of the Saar-Nahe Basin, SW Germany. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen.
45. Poschmann, M.J., T.A. Hegna, L. Numberger-Thuy, B. Thuy. accepted. Mass mortality of clam shrimp (Crustacea, Branchiopoda) from the Lower Devonian (Emsian) fossil-lagerstätte of Consthum/Luxembourg—paleoecologic and taxonomic implications. Journal of Paleontology.
44. Geyer, G., T.A. Hegna, & K.-P. Kelber. 2024. The end of the “living fossil” tale? A new look to Triassic specimens assigned to the tadpole shrimp Triops cancriformis (Notostraca) and associated phyllopods from the Vosges region (eastern France). Papers in Palaeontology. 10(5): e1589. [link]
43. Poschmann, M.J., T.A. Hegna, T.I. Astrop, & R. Hoffmann. 2024. 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, 104: 535-569. [link]
2023
42. Melim, L.A., S.R. Mure-Ravaud*, T.A. Hegna, B. Bellott, & R. Lerosey-Aubril. 2023. Reply to discussion: Silicified trilobites and biofilm from the Cambrian Weeks Formation, Utah: evidence for microbial mediation of silicification. Geology, 51(9): e567.
* denotes WIU undergraduate student
41. Laville, T., T.A. Hegna, M.-B. Forel, S.A.F. Darroch, & S. Charbonnier. 2023. New look at Concavicaris woodfordi (Euarthropoda: Tetraconata?) using micro-computed tomography. Palaeontologia Electronica, 26(1):a1.https://doi.org/10.26879/1218. [link] [YouTube link]
40. Melim, L.A., S.R. Mure-Ravaud*, T.A. Hegna, B. Bellott, & R. Lerosey-Aubril. 2023. Silicified trilobites and biofilm from the Cambrian Weeks Formation, Utah: evidence for microbial mediation of silicification. Geology, 51(1): 80-84.
* denotes WIU undergraduate student
2022
39. Van Houte, E.*, T.A. Hegna, & A.D. Butler. 2022. A new genus and species of ?parthenogenic anostracan (Crustacea, Branchiopoda, ?Thamnocephalidae) from the Cretaceous Koonwarra Fossil Beds in Australia. Alcheringa. 46(2): 180-187.
*denotes a SUNY Fredonia undergrad student
2021
38. Hegna, T.A. 2021. A redescription of the clam shrimp, Orthestheria shupei (Stephenson, in Stephenson & Stenzel, 1952) comb. nov., from the Cenomanian (Cretaceous) of Texas. Cretaceous Research, 125: 104864.
37. Wei, Y.-F., A.-G. Dong, D.-Y. Huang, Y.-W. Du, T.A. Hegna, X.-N. Lian, & D. Audo. 2021. Amphipoda from the Late Neogene of Shanxi, China. Palaeoentomology, 4(1):85-93.
2020
36. Hegna, T.A., A.D. Czaja, & D.C. Rogers. 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, 40(6): 756-760.
35. Hegna, T.A. & D.C. Rogers. 2020. The world's first clam shrimp symposium: Drawing paleontology and biology together. Zoological Studies, 59(46): 1-3. [link]
34. Rogers, D.C. & T.A. Hegna. 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, 59(32): 1-3. [link]
33. Hegna, T.A., & T.I. Astrop. 2020. The Fossil Record of the Clam Shrimp (Crustacea; Branchiopoda). Zoological Studies, 59(43): 1-9. [link]
32. Hegna, T.A., J. Luque & J.M. Wolfe. 2020. The Fossil Record of the Crustacea. 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, Oxford.
31. Hegna, T.A. & J. Olesen. 2020. Branchiopoda. Pages 587-593. In K. de Queiroz, P. D. Cantino, and J. Gauthier (eds.) Phylonyms: a Companion to the PhyloCode. CRC Press, Boca Raton.
30. Broda, K., Š. Rak, & T. A. Hegna. 2020. Do the clothes make the thylacocephalan? A detailed study of Concavicarididae and Protozoeidae (?Crustacea, Thylacocephala) carapace micro-ornamentation. Journal of Systematic Palaeontology. 18(11): 911-930.
29. Gallego, O.F., M.D. Monferran, A.L. Stigall, I.A. Zacarías, T.A. Hegna, V.C. Jiménez, J. Bittencourt, G. Li, & H.G. Barrios Calathaki. 2020. The Devonian-Cretaceous fossil record of "conchostracans" of Africa and their paleobiogeographic relationships with other Gondwanan faunas. Journal of African Earth Sciences, 161: 103648.
28. Hegna, T.A., E.A. Lazo-Wasem, M.L. Serrano-Sánchez, R. Barragán, & F.J. Vega. 2020. A new fossil talitrid amphipod from the Lower Early Miocene Chiapas amber documented with microCT scanning. Journal of South American Earth Sciences. 98:102462.
2019
[Moved to SUNY Fredonia]
2018
27. Lerosey-Aubril, R., R.R. Gaines, T.A. Hegna, J. Ortega-Hernández, P. Van Roy, C. Kier & E. Bonino. 2018. The Weeks Formation Koservat-Lagerstätte and the evolutionary transition of Cambrian marine life. Journal of the Geological Society of London, 175: 705-715.
26. Perez-Huerta, A., I. Coronado Vila, & T.A. Hegna. 2018. Understanding biomineralization in the fossil record. Earth-Science Reviews, 179: 95-122.
2017
25. Hegna, T.A., M.J. Martin & S.A.F. Darroch. 2017. Pyritized in situ trilobite eggs from the Ordovician of New York (Lorraine Group): Implications for trilobite reproductive biology. Geology, 45(3): 199-202.
24. Garwood, R.J., J.A. Dunlop, B.J. Knecht*, T.A. Hegna. 2017. The phylogeny of fossil whip spiders. BMC Evolutionary Biology, 17:105. [link]
* denotes WIU undergraduate student
2016
23. Hegna, T.A. & R.E. Johnson. 2016. Preparation of Fossil and Osteological 3D-Printable Models from Freely Available CT-Scan Movies. Journal of Paleontological Techniques, 16: 1-10. [link]
22. Hegna, T.A., S.T. Ahyong, & G.D.F. Wilson. 2016. Squilloides Tchindonova & Tchesunov, 1993 is a spelaeogriphacean, not an isopod. Journal of Crustacean Biology, 36(6): 860-862.
21. Hegna, T.A. & A.A. Kotov. 2016. An ephippium of the genus Ceriodaphnia Dana, 1853 (Cladocera: Anomopoda: Daphniidae) from the Lower Cretaceous of Australia. Palaeontologia Electronica, 19.3.40A: 1-9. [link]
20. Starr, H.*, T.A. Hegna, & M.A.S. McMenamin. 2016. Epilogue to the tale of the Triassic Amphipod: Rosagammarus is a decapod tail (Luning Formation, Nevada). Journal of Crustacean Biology, 36(4): 525-529.
* denotes WIU undergraduate student
2015
19. Serrano, M. de L., T.A. Hegna, P. Schaaf, L. Pérez, E. Centeno-Garcia, & F.J. Vega. 2015. The aquatic and semiaquatic biota in Miocene amber from the Campo La Granja Mine (Chiapas, Mexico): Paleoenvironmental implications. Journal of South American Earth Sciences, 62: 243-256.
18. Roberts, E., H. Jelsma, S. Perritt & T.A. Hegna. 2015. Mesozoic sedimentary cover sequences of the Congo Basin in the Kasai Region, Democratic Republic of Congo. In "Geology and Resource Potential of the Congo Basin—dedicated to L. Cahen and H. Kampunzu", edited by M.J. de Wit, F. Guillocheau, M.C.J De Wit. Springer Verlag. p. 163-191.
ISBN 978-3-642-29481-5 [click here for more info]
17. Broda, K., T.A. Hegna & M. Zatoń. 2015. Fossils explained: Thylacocephalans. Geology Today, 31(3): 116-120.
16. Lagebro, L., P. Gueriau, T.A. Hegna, N. Rabet, A.D. Butler, & G.E. Budd. 2015. The oldest notostracan (Upper Devonian Strud locality, Belgium). Palaeontology, 58(3): 497-509.
15. Astrop, T.I. & T.A. Hegna. 2015. Phylogenetic relationships between living and fossil spinicaudatan (Crustacea: Branchiopoda) taxa: Reconsidering the evidence. Journal of Crustacean Biology, 35(3): 339-354.
2014
14. Lerosey-Aubril, R., Hegna, T.A., Babcock, L.E., Bonino, E., and Kier, C. 2014. Arthropod appendages from the Weeks Formation Konservat-Lagerstätte: new occurrences of anomalocaridids in the Cambrian of Utah, USA. Bulletin of Geoscience, 89(2):269-282. [click here]
13. Wolfe, J.M. & T.A. Hegna. 2014. Testing the phylogenetic position of Cambrian pancrustacean larval fossils by coding ontogenetic stages. Cladistics, 30(4): 366-390. DOI: 10.1111/cla.12051
12. Hegna, T.A., Vega, F.J., and González-Rodríguez, K.A. 2014. First Mesozoic Thylacocephalans in the Western Hemisphere: new discoveries from the Muhi Quarry Lagerstätte. Journal of Paleontology, 88 (3): 606-616. DOI: 101666/13-131.1
2013
11. Hegna, T.A., Legg, D.A., Møller, O.S., Van Roy, P., & Lerosey-Aubril, R. 2013. The correct authorship of the taxon name ‘Arthropoda’. Arthropod Systematics & Phylogeny, 71(2): 71-74. [click here]
10. McRoberts, C.A., T.A. Hegna, J. Burke, M.L. Stice*, S.K. Mize & M.J. Martin. 2013. Original spotted patterns on Middle Devonian phacopid trilobites from western and central New York. Geology, 41: 607-610.
* denotes WIU undergraduate student
9. Hörnschemeyer, T.; Haug, J.; Béthoux, O.; Beutel, R.G.; Charbonier, S.; Hegna, T.A.; Koch, M.; Rust, J.; Wedmann, S.; Bradler, S.; Willmann, R. 2013. Strudiella — not a Devonian insect! [reply to: Garrouste et al. 2012. A complete insect from the Late Devonian period. Nature 488, 82-85.] Nature, 494: E3-E4.
2012
8. Williams, T., B. Blachuta, T.A. Hegna, & L.M. Nagy. 2012. Decoupling Elongation and Segmentation: Notch involvement in Anostracan Crustacean Segmentation. Evolution & Development, 14(4): 372-382.
7. Lerosey-Aubril,R., T.A. Hegna, C. Kier, E. Bonino, J. Habersetzer & M. Carré. 2012. Controls on Gut Phosphatisation: The Trilobites from the Weeks Formation Lagerstätte (Cambrian; Utah). PLoS ONE, 7(3): e32934.doi:10.1371/journal.pone.0032934 [click here]
2011
6. Lerosey-Aubril, R., T.A. Hegna & S. Olive. 2011. Inferring internal anatomy from the trilobite exoskeleton: the relationship between frontal auxiliary impressions and the digestive system. Lethaia, 44: 166-184.
2010
5. Hegna, T.A. & D. Ren. 2010. Two new “notostracans”, Chenops gen. nov. and Jeholops gen. nov. (Crustacea: Branchiopoda: ?Notostraca) from the Yixian Formation, northeastern China. Acta Geologica Sinica, 84(4):886-894.
4. Hegna, T.A. & E.A. Lazo-Wasem. 2010. 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, 30(3):445-464.
3. Hegna, T.A. 2010. Photography of soft-bodied crustaceans via drying, whitening, and splicing. Journal of Crustacean Biology, 30(3):351-356.
2. Hegna, T.A. 2010. The function of forks: Isotelus-type hypostomes and trilobite feeding. Lethaia, 43:411-419.
2008
1. Hegna, T.A. 2008. Cladistic analysis of ptychaspidid trilobites (Upper Cambrian), and a new hypothesis of ingroup relationships. Cuadernos del Museo Geominero, n° 9 Advances in Trilobite Research: 167-169.