The early Eocene <i>Swauka ypresiana</i> n. gen. n. sp., the oldest gossamerwing damselfly (Odonata, Epallagidae, Epallaginae) and first fossil insect described from the Swauk Formation of central Washington, U.S.A.
Abstract We describe Swauka ypresiana n. gen. n. sp., the second fossil gossamerwing damselfly (Odonata, Zygoptera, Epallagidae, Epallaginae) and its oldest occurrence. It is the first fossil insect reported from the Swauk Formation of central Washington State, U.S.A. It was recovered from the “Sandstone facies of Swauk Pass,” a fluvial unit, immediately below the Silver Pass Volcanic Member of the Swauk Formation, which has a U–Pb zircon CA-ID-TIMS age of 51.364 ± 0.029 Ma. The host deposits probably represent mud-dominated floodplain lake or oxbow lake environments. UUID: http://zoobank.org/20167852-bcbc-4f8b-b372-dffa591abd6a
Authors
- James E. Evans (ORCID: https://orcid.org/0000-0002-9382-1910)
- Rolf W. Mathewes (ORCID: https://orcid.org/0000-0001-7637-199X)
- Robert A. Cannings
- S. Bruce Archibald (ORCID: https://orcid.org/0000-0002-4397-2497)
Institutions
- Royal British Columbia Museum (CA)
- University of British Columbia (CA)
- Bowling Green State University (US)
- Simon Fraser University (CA)
- Museum of the History of Science (GB)
Publication Details
- Journal
- Journal of Paleontology
- Published
- 2024-11-01
- DOI
- https://doi.org/10.1017/jpa.2024.60
- Citations
- 1
- Primary Topic
- Freshwater macroinvertebrate diversity and ecology
- Type
- article
- Field-Weighted Citation Impact
- 0.46
Funders
- Johns Hopkins University
- Parks Canada
- Russian Academy of Sciences