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Coleopterous egg deposition on alder leaves from the Klondike Mountain Formation (Middle Eocene), northeastern Washington

Published online by Cambridge University Press:  20 May 2016

Standley E. Lewis  and
Mark A. Carroll
Standley E. Lewis
Affiliation:
Department of Biological Sciences, St. Cloud State University, St. Cloud, Minnesota 56301
Mark A. Carroll
Affiliation:
Department of Biological Sciences, St. Cloud State University, St. Cloud, Minnesota 56301
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Extract

Flea beetle (Chrysomelidae) egg deposition has been found on three impressions of alder (Alnus parvifolia) leaves collected at a roadcut in Republic, Washington. These fossils were discovered by Wes Wehr (University of Washington, Burke Museum) during investigations of fossil plants from the Republic, Washington, area. These impressions represent a yet to be determined species, belonging to the genus Altica GeofFroy (1762). They represent the first member of this genus to be described from the Eocene of North America. The fossils were found in lacustrine rocks from the lower part of the Klondike Mountain Formation. Figure 1 represents the Republic fossil locality and the distribution of this Formation. A brief description of the geologic history of this region can be found in Wolfe and Wehr (1987). The Klondike Mountain Formation has a radiometric age that ranges from 42.3 ± 2.0 to 50.3 ± 1.7 m.y. (Pearson and Obradovich, 1977).

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 65 , Issue 2 , March 1991 , pp. 334 - 335
Copyright
Copyright © The Paleontological Society 

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References

Geoffroy, E. L. 1762. Histoire alregee des insectes.CrossRefGoogle Scholar
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Wolfe, J. A., and Wehr, W. 1987. Middle Eocene dicotyledonous plants from Republic, northeastern Washington. U.S. Geological Survey Bulletin 1597, 25 p.Google Scholar
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Woods, W. C. 1918. The biology of Maine species of Altica. Maine Agricultural Experiment Station Bulletin, 273:149–204.Google Scholar