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First record of egg-sets from damselflies Insecta, Zygoptera, Lestidae in the Middle Eocene brown coal of the opencast pit Muecheln, Neumark-Nord Geiseltal, Sachsen-Anhalt, Germany Erster Nachweis von Kleinlibellen - Eilogen Insecta, Zygoptera, Lestidae in der mitteleozaenen Braunkohle des ehemaligen Tagebaues Muecheln, Baufeld Neumark-Nord Geiseltal, Sachsen-Anhalt, Deutschland



First record of egg-sets from damselflies Insecta, Zygoptera, Lestidae in the Middle Eocene brown coal of the opencast pit Muecheln, Neumark-Nord Geiseltal, Sachsen-Anhalt, Germany Erster Nachweis von Kleinlibellen - Eilogen Insecta, Zygoptera, Lestidae in der mitteleozaenen Braunkohle des ehemaligen Tagebaues Muecheln, Baufeld Neumark-Nord Geiseltal, Sachsen-Anhalt, Deutschland



Hallesches Jahrbuch fuer Geowissenschaften Reihe B Geologie Palaeontologie Mineralogie, 24: 47-55



In May 2001 geological and paleontological research was done in the opencast pit Mucheln; Neumark-Nord. During this effort egg-sets of fossil damselflies (Zygoptera, Lestidae) were found in the (?)Upper Middle Eocene brown coal (= MP 13) of the Geiseltal, the first record in this famous site ever found. In contrast to earlier treated specimens originating from the Messel pil near Darmstadt, whose sediments belong stratigraphically to the Lower Middle Eocene (= MP 11). The described new specimen is around 2.5 mio. a younger. The producer of the Geiseltal egg-sets presumably is a member of the family Lestidae, whereas the Messel specimens were made by individuals of the family Coenagrionidae, respectively Platycnemidae. These families belong to the sub-order Zygoptera. It is striking that the recently found egg-sets are the only evidence for the entire order Zygoptera over decades of collecting in the pits of the Geiseltal district. Corresponding larva or imagines were never observed. This fact may be due to biostratinomical reasons on the one hand, but also because of the fact that such filigree and small objects may have been overlooked on the dark substratum during fossil excavations. It has to be underlined once more that the endophytic reproductive strategy of certain damselflies is at least successfully practised since the Paleogene until today. A lot of analogs can be observed in the recent Odonatafauna.

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