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Type: Article
Published: 2024-05-02
Page range: 588-594
Abstract views: 1
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Two new damselflies from the Eocene Green River Formation (Odonata, Zygoptera, Dysagrionidae, Thaumatoneuridae)

Institut de Systématique; Evolution; Biodiversité (ISYEB); Muséum national d’Histoire naturelle; CNRS; Sorbonne Université; EPHE; Université des Antilles; CP 50; 57 rue Cuvier; 75005 Paris; France
Odonata Insecta Petrolestinae Eodysagrioninae gen. et sp. nov paleodiversity


Two new damselflies are described on the basis of isolated wings from the Eocene Green River Formation (Colorado, USA), the eodysagrionine new genus and species Gusagrion coloratum and the dysagrionid new species Petrolestes inexpectatus. These new taxa confirm the great diversity of the fauna of large damselflies in this formation, currently much more important than the smaller damselflies of Lestoidea and Coenagrionoidea clades and of the large Anisoptera. It seems that important changes occurred in the faunal composition of the Odonata between the Eocene and Oligocene.


  1. Archibald, S.B., Cannings, R.A., Erickson, R.J., Bybee, S.M. & Mathewes, R.W. (2021) The Cephalozygoptera, a new, extinct suborder of Odonata with new taxa from the early Eocene Okanagan Highlands, western North America. Zootaxa, 4934 (1), 1–133.
  2. Bechly, G. (1996) Morphologische Untersuchungen am Flügelgeäder der rezenten Libellen und deren Stammgruppenvertreter (Insecta; Pterygota; Odonata), unter besonderer Berücksichtigung der Phylogenetischen Systematik und des Grundplanes der Odonata. Petalura Special Volume, 2, 1–402.
  3. Bechly, G. (2016) Phylogenetic systematics of Odonata. Homepage on internet site. Available from: (accessed 3 April 2024)
  4. Bechly, G., Garrouste, R., Aase, A., Karr, J.A., Grande, L. & Nel, A. (2021) The damselfly palaeofauna from the Eocene of Wyoming and Colorado, USA (Insecta, Odonata, Zygoptera). Papers in Palaeontology, 7 (3), 1373–1402.
  5. Cockerell, T.D.A. (1908) Some result of the Florissant expedition, 1908. American Naturalist, 42, 569–581.
  6. Cockerell, T.D.A. (1921) Some Eocene insects from Colorado and Wyoming. Proceedings of the United States National Museum, 59, 29–38.
  7. Cockerell, T.D.A. (1927) A new fossil dragonfly from the Eocene of Colorado. The Entomologist, 60, 81–82.
  8. Cockerell, T.D.A. (1928) A remarkable new dragon-fly from the Eocene (Odonata). Entomological News, 39, 297–301.
  9. Cockerell, T.D.A. (1940) A dragon-fly from the Eocene of Colorado (Odonata, Agrionidae). Entomological News, 51, 103–105.
  10. Fabricius, J.C. (1793) Entomologia systematica emendata et aucta, secundum classes, ordines, genera, species, adjectis synonymis, locis, observationibus, descriptionibus. Vol. 3. Parts 1 & 2. C.G. Proft, Hafniae, 836 pp.
  11. Garrouste, R. & Nel, A. (2015) New Eocene damselflies and first Cenozoic damsel-dragonfly of the isophlebiopteran lineage (Insecta: Odonata). Zootaxa, 4028 (3), 354–366.
  12. Grande, L. (1984) Paleontology of the Green River formation with a review of the fish fauna. The Geological Survey of Wyoming Bulletin, 63, 1–333.
  13. Huang, D., Azar, D., Cai, C., Maksoud, S., Nel, A. & Bechly, G. (2017) Mesomegaloprepidae, a remarkable new damselfly family (Odonata: Zygoptera) from mid-Cretaceous Burmese amber. Cretaceous Research, 73, 1–13.
  14. Lin, Q., Petrulevičius, J.F., Huang, D., Nel, A. & Engel, M.S. (2010) First fossil Calopterygoidea from Southeastern Asia (Odonata: Zygoptera): a new genus and species from the Paleogene of China. Geobios, 43, 349–353.
  15. Nel, A. (2020) The second genus of the extinct dragonfly family Urolibellulidae from the Eocene Green River Formation (Odonata, Anisoptera: Cavilabiata). Palaeoentomology, 3 (1), 50–53.
  16. Nel, A. (2022) Revision of the two small damselflies Eopodagrion scudderi Cockerell, 1921 and Eopodagrion ‘Podagrion’ abortivum (Scudder, 1878) (Odonata, Zygoptera) from the lower Eocene of Green River Formation (USA). Palaeoentomology, 5 (6), 537–544.
  17. Nel, A. (2023) A new genus and species of damselfy (Zygoptera, ‘Megapodagrionidae’ sensu lato) from the Lower Eocene Green River Formation in USA. Historical Biology, 35 (11), 2166–2170.
  18. Nel, A., Martínez-Delclòs, X., Paicheler, J.-C. & Henrotay, M. (1993) Les ‘Anisozygoptera’ fossiles. Phylogénie et classification (Odonata). Martinia Numéro, Hors Série, 3, 1–311.
  19. Nel, A. & Paicheler, J.-C. (1992) Les Odonata fossiles: Etat actuel des connaissances. Huitième partie: les Calopterygoidea fossiles (Odonata, Zygoptera). Bulletin de la Société Entomologique de France, 97 (4), 381–396.
  20. Nel, A. & Paicheler, J.-C. (1993) Les Odonata fossiles: état actuel des connaissances. 7. Les Coenagrionoidea fossiles [Odonata, Zygoptera]. Entomologica Gallica, 4 (2–3), 59–63.
  21. Nel, A. & Paicheler, J.-C. (1994) Les Lestoidea (Odonata, Zygoptera) fossiles: un inventaire critique. Annales de Paléontologie, 80 (1), 1–59.
  22. Nel, A., Palazzo, G.J. & Aase, A. (2023) A new damselfy from the Lower Eocene Green River Formation (Odonata, Dysagrionidae). Palaeoentomology, 6 (4), 336–339.
  23. Petrulevičius, J.F., Nel, A., Rust, J., Bechly, G. & Kohls, D. (2007) New Paleogene Epallagidae (Insecta: Odonata) recorded in North America and Europe. Biogeographic implications. Alavesia, 1, 15–25.
  24. Riek, E.F. & Kukalová-Peck, J. (1984) A new interpretation of dragonfly wing venation based upon Early Carboniferous fossils from Argentina (Insecta: Odonatoidea) and basic characters states in pterygote wings. Canadian Journal of Zoology, 62, 1150–1166.
  25. Rust, J., Petrulevičius, J. & Nel, A. (2008) The first damselflies from the Lowermost Eocene of Denmark, with a description of a new subfamily (Odonata, Zygoptera: Dysagrionidae). Palaeontology, 51 (3), 709–713.
  26. Scudder, S.H. (2009) The Miocene insect-fauna of Œningen, Baden. Geological Magazine, 2 (3), 116–122.
  27. Selys-Longchamps, E. de & Hagen, H.A. (1854) Monographie des Caloptérygines. Mémoires de la Société des Sciences de Liège, 9, i–xi + 1–291.
  28. Smith, M.E., Singer, B. & Carroll, A. (2003) 40Ar/39Ar geochronology of the Eocene Green River Formation, Wyoming. GSA Bulletin, 115, 549–565.<0549:AGOTEG>2.0.CO;2
  29. Tillyard, R.J. & Fraser, F.C. (1938) A reclassification of the order Odonata based on some new interpretations of the venation of the dragonfly wing. Part 1. The Australian Zoologist, 9, 124–169.
  30. Zeiri, A., Nel, A. & Garrouste, R. (2015) A new libelluloid family from the Eocene Green River Formation (Colorado, USA) (Odonata, Anisoptera). Zootaxa, 4032 (3), 290–296.