Insect Egg Fossils From Cretaceous Central Europe

Knoblochia cretacea, Late Cretaceous insect eggs from Central Europe

Authors:

1. Zuzana Heřmanová (a, b)
2. Emese Bodor (c, d)
3. Jiří Kvaček (a)

Affiliations:

a. National Museum Prague, Václavské náměstí 68, 115 79, Prague 1, Czech Republic

b. Charles University, Institute of Geology and Palaeontology, Albertov 6, 128 43 Prague 2, Czech Republic

c. Eötvös Loránd University, Department of Palaeontology, Pázmány Péter sétány 1/C, H-1117 Budapest, Hungary

d. Geological and Geophysical Institute of Hungary, Stefánia Street 14, H-1117 Budapest, Hungary

Abstract:

The genus Knoblochia is established for fossil insect eggs. The fossils are small, longitudinally ridged, ovoid to round with projections on both ends. Their thin perforated wall is covered by minute papillae, inner surface of the wall is smooth or covered by rectangular files of cells. Fossils assigned here to Knoblochia cretacea were earlier assigned to the genus Spirellea, which encompass a heterogenous complex of small fossils being or resembling angiosperm seeds from the Late Cretaceous. The majority of species of the genus Spirellea clearly represents remains of angiosperms. However, fossils described by Knobloch and Mai (1986) as Spirellea kvacekii are distinct, particularly in having external walls perforated, neither apex nor basal projection showing any absition scar or micropyle in the botanical sense. Attribution of these fossils to insects led us to designate the new name Knoblochia cretacea with a new holotype for fossils of this kind. Comparison of Knoblochia with insect eggs of species of Phasmatodea and Lepidoptera, and seeds of Stemonaceae showed clear affinity to insects. Due to the high amount of extinction among insects since the Cretaceous, the systematic affinity of Knoblochia remains open.