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Summary
DescriptionHeptageniidae incertae sedis (Lewis, 1992) plate1, fig B.png
English: Lewis (1992) fig B) Ephemeropterans; Family Heptageniidae, immature
Described by Sinitchenkova (1999) as Neoephemera antiqua
51-49 million years old, Ypresian, Klondike Mountain Formation, Republic, Washington
University of Washington, Burke Museum specimen #UWBM 57158
Date
Source
(1992). "Insects of the Klondike Mountain Formation, Republic, Washington". Washington Geology20 (3): 15–19.
Author
Lewis, S.E. 1992
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