A new species of Lonchodryinus (Hymenoptera, Dryinidae) from Upper Eocene Baltic amber Author Olmi, Massimo Tropical Entomology Research Center, Via De Gasperi 10. I- 01100 Viterbo, Italy. Author Vasilenko, Dmitry V. 0000-0002-4827-7290 Cherepovets State University, Lunacharsky prospect 5, Cherepovets 162600, Vologda region, Russia. & A. A. Borissiak Paleontological Institute of the Russian Academy of Sciences, Profsoyuznaya Str. 123, Moscow, 117647, Russia. damageplant @ mail. ru; http: // orcid. org / 0000 - 0002 - 4827 - 7290 damageplant@mail.ru Author Capradossi, Leonardo Via Pericle Scriboni 28, 01017 Tuscania, Italy. Author Perkovsky, Evgeny E. 0000-0002-7959-4379 I. I. Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine, B. Khmelnitskogo 15, Kiev, 01601, Ukraine. perkovsk @ gmail. com; http: // orcid. org / 0000 - 0002 - 7959 - 4379 perkovsk@gmail.com Author Guglielmino, Adalgisa Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, 01100 Viterbo, Italy. text Zootaxa 2021 2021-08-12 5020 2 328 336 journal article 4920 10.11646/zootaxa.5020.2.5 d4683243-5ec7-4349-a0b7-b441c1691733 1175-5326 5223346 5D733C61-DB9E-4E59-9321-38F8C02754FF Key to the species of fossil Lonchodryinus ( ♀ ) 1 Head with OPL more than 3 × as long as POL; 2r-rs&Rs vein with distal part (Rs) more than twice as long as proximal part (2r-rs) and with curve more pronounced ( Fig. 3 )................................... L. balticus Olmi & Guglielmino – Head with OPL less than 2 × as long as POL ( Fig. 1 ); 2r-rs&Rs vein with distal part (Rs) less than twice as long as proximal part (2r-rs) and with curve less pronounced ( Fig. 1 )............................................ L. groehni sp. nov .