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Godunko, R.J. 2007.

Contribution to the knowledge of the fossil subgenus Nestormeus Godunko, 2004 (Ephemeroptera: Heptageniidae: Ecdyonurus) from the Baltic amber (Eocene)

. Zootaxa. 1661, 1 (Dec. 2007), 63–68. DOI:https://doi.org/10.11646/zootaxa.1661.1.7.