NEW MAYFLIES FROM THE UPPER MESOZOIC TRANSBAIKALIAN LOCALITY CHERNOVSKIE KOPI (INSECTA: EPHEMERIDA = EPHEMEROPTERA)

Abstract

Seven new species and a new genus, Clavineta transbaikalica sp. nov., C. citima sp. nov., Mesoneta deusta sp. nov. (Mesonetidae), Siberiogenites recticostalis sp. nov. (Hexagenitidae), Mesobaetis amplectus sp. nov., Siphangarus rotundus gen. et sp. nov., and Stackelbergisca clara sp. nov. (Siphlonuridae), are described based on nymphs. The mayfly assemblage of the Transbaikalian locality Chernovskie Kopi is analyzed. This assemblage is unique for the Mesozoic of Asia, but generally more similar to Jurassic rather than to Cretaceous assemblages.