Revision of rock fossils of Dryinidae and Embolemidae (Hymenoptera: Chrysidoidea).

Abstract

New fossil taxa of Embolemidae and Dryinidae (Hymenoptera: Chrysidoidea) are described. For Embolemidae, Embolemopsis baissensis n. gen. n. sp. and Baissobius minutus n. sp., are described from Central Siberia, West Transbaikalia, left bank of Vitim River (facing downstream), Baissa, lake deposits from earlier Early Cretaceous (Neocomian stage) (130-140 mybp). For Dryinidae, Anteonopsis antiquus n. gen. n. sp., Bocchus ? cenomanianus n. sp. and Gonatopus ? cretacicus n. sp., are described from Siberia, Magadan Region, Obeschchayushchiyi, tuffaceous deposits from Upper Cretaceous (Cenomanian) (90-95 mybp); Deinodryinus ? aptianus n. sp., is described from Central Mongolia, Bayanhongor Aimag, 5-8 Km N Bon Tsagan Nuur Lake, from impressed in lake deposits of the Khurilt rock unit probably of Aptian (Early Cretaceous) (100-115 mybp). In addition, an unidentified fossil belonging to Deinodryinus ? or Dryinus ? is recorded from Russian Far East, Maritime Province, Velikaya Kema (later Earlier or early Middle Miocene) (about 30 mybp). The known species of Baissobius Rasnitsyn are reviewed and a key is presented. The types of all described taxa are deposited in A. A. Borissiak Palaeaontological Institute, Academy of Sciences, Moscow, Russia.