Geologica Acta, Vol.2, Nº1, 2004, 83-94 Available online at www.geologica-acta.com A new fossil ichneumon wasp from the Lowermost Eocene amber of Paris Basin (France), with a checklist of fossil Ichneumonoidea s.l. (Insecta: Hymenoptera: Ichneumonidae: Metopiinae) J.-J. MENIER, A. NEL, A. WALLER and G. DE PLOËG Laboratoire d’Entomologie and CNRS UMR 8569, Muséum National d’Histoire Naturelle 45 rue Buffon, F-75005 Paris, France. Menier E-mail:
[email protected] Nel E-mail:
[email protected] ABSTRACT We describe a new fossil genus and species Palaeometopius eocenicus of Ichneumonidae Metopiinae (Insecta: Hymenoptera), from the Lowermost Eocene amber of the Paris Basin. A list of the described fossil Ichneu- monidae is proposed. KEYWORDS Insecta. Hymenoptera. Ichneumonidae. n. gen., n. sp. Eocene amber. France. List of fossil species. INTRODUCTION Nevertheless, the present fossil record suggests that the family was already very diverse during the Eocene and Fossil ichneumonid wasps are not rare. Brues (1910a) Oligocene. listed 12 genera in the Baltic amber and 34 genera in the Oligocene Florissant shales (U.S.A.). Statz (1938) listed We describe the first fossil representative of the sub- 124 species of fossil Ichneumonidae from eight lacustrine family Metopiinae, discovered in the Lowermost Eocene outcrops ranging between the Eocene and the Miocene, amber of the Paris basin. The present discovery supports and only 15 species from the Upper Eocene Baltic amber. the hypothesis of a high diversity of the Ichneumonidae Currently, circa 190 species have been described (see during the Paleogene. We follow the standard conven- appendix). Fossil taxa from lacustrine outcrops are main- tions for wing veins proposed by Mason (1986) and the ly based on wing venational characters.