Taxonomic history and review of the Förster genera of Platygastridae (Hymenoptera: Platygastroidea) Author Awad, Jessica 0F70AC80-70B4-4AED-BF6E-A191DF4F68BB State Museum of Natural History Stuttgart, Rosenstein 1, 70191 Stuttgart, Germany. FDACS-DPI, 1911 SW 34 St, Gainesville FL 32608, USA. jessica.awad@smns-bw.de Author Krogmann, Lars CF157CC1-326C-4BF9-A262-CBF9FF179B6E State Museum of Natural History Stuttgart, Rosenstein 1, 70191 Stuttgart, Germany. FDACS-DPI, 1911 SW 34 St, Gainesville FL 32608, USA. lars.krogmann@smns-bw.de Author Talamas, Elijah FDE12E40-BFCE-444A-AFAD-9A214A129345 elijah.talamas@fdacs.gov text European Journal of Taxonomy 2023 2023-06-15 875 1 1 46 http://dx.doi.org/10.5852/ejt.2023.875.2137 journal article 56102 10.5852/ejt.2023.875.2137 7d1475e5-5737-43a0-910d-c83a4cc6878c 2118-9773 8047251 6F308D64-2F63-454F-AF52-2F712A1DD2F5 Genus Ectadius Förster, 1856 (junior synonym of Synopeas Förster, 1856 ) Ectadius Förster, 1856: 108 , 113. Type species Platygaster craterus Walker, 1835 by monotypy. Junior synonym of Synopeas Förster, 1856 – Masner 1965: 140 . Polymecus Förster, 1856: 144 . Unnecessary replacement name for Ectadius Förster, 1856 . Remarks In the addendum, Förster (1856) unnecessarily proposed the replacement name Polymecus to avoid confusion with the plant genus Ectadium E.Mey. Förster distinguished Ectadius from Synopeas by the elongate female metasoma in the former. It was later treated as a junior synonym of Synopeas by Fouts (1924) . The type species of Ectadius is Platygaster craterus Walker, 1835 , by monotypy, for which the primary type is deposited in NMINH. The specimens in Vienna are original exemplars, likely provided by Walker himself and used in the original description of the genus. They are identical to the lectotype and paralectotype except for being somewhat lighter in color.