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Type: Article
Published: 2021-07-13
Page range: 325-334
Abstract views: 449
PDF downloaded: 193

The second North American fossil horntail wood-wasp (Hymenoptera: Siricidae), from the early Eocene Green River Formation

Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6, Canada; and Museum of Comparative Zoology, 26 Oxford Street, Cambridge, Massachusetts, 02138, United States of America; and Royal British Columbia Museum, 65 Belleville Street, Victoria, British Columbia, V8W 9W2, Canada.
Fossil Butte National Monument, 864 Chicken Creek Road, Kemmerer, WY 83101, Wyoming, USA.
Institut de Systématique, Évolution, Biodiversité (ISYEB) Muséum national d’Histoire naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, CP50, 57 rue Cuvier 75005 Paris, France.
Insecta ‘Symphyta’ Teredon paleobiogeography Hymenoptera


Eoteredon lacoi gen. et sp. nov., is described from the early Eocene Green River Formation in Wyoming, the second fossil siricid genus and species described from North America. We propose Eoteredon as sister to the genus Teredon, whose sole species is one of the rarest of extant Siricidae. The majority of siricids today inhabit temperate Northern Hemisphere forests; Teredon cubensis, however, is one of its few species that live in megathermal tropical lowlands. The Eocene forest that Eoteredon inhabited had a mesothermal to megathermal climate. We place Eoteredon in the context of broad Cenozoic climate change.


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