The genus Medetera (Diptera: Dolichopodidae) in the Czech Republic with first records of twelve species Author Kejval, Zbyněk Muzeum Chodska, Chodské náměstí 96, CZ- 344 01 Domažlice, Czech Republic Author Pollet, Marc 0000-0001-5198-5928 Research Institute for Nature and Forest (INBO), Herman Teirlinckgebouw, Havenlaan 88 bus 73, B- 1000 Brussels, Belgium & Royal Belgian Institute of Natural Sciences (RBINS), Operational Directory Taxonomy and Phylogeny, Entomology, Vautierstraat 29, B- 1000 Brussels, Belgium. mpollet. doli @ gmail. com; https: // orcid. org / 0000 - 0001 - 5198 - 5928 mpollet.doli@gmail.com text Zootaxa 2023 2023-03-09 5254 1 69 93 http://dx.doi.org/10.11646/zootaxa.5254.1.4 journal article 10.11646/zootaxa.5254.1.4 1175-5326 7710858 A7B92D56-B267-4EBE-9896-187B043274F7 Medetera acanthura Negrobov & Thuneberg, 1970 Material examined. Bohemia : Bílina, 3 km E (5449), Chloumek, 50°33′N 13°50′E , 410 m , damp meadow/forest, 8.v.1994 , M. Barták lgt., 1 ♁ ( NMPC ). Rozvadov (6341), Diana NR, 49°38′02″N 12°34′42″E , 500–530 m , Fagus / Alnus , 13.vii.2020 , 1 ♁ ( MCH ). Hamry, 2.5 km W (6744), Ostrý potok (stream) valley, 49°12′37″N 13°07′14″E , 850–1000 m , 16.vi.2022 , 1 ♁ ( MCH ). Hamry, 2.5 km S (6844), Bílý potok (stream) valley, 49°11′49″N 13°09′19″E , 760–780 m , 26.vi.2022 , 1 ♁ ( MCH ). Distribution. Finland , Norway , Russia , Sweden , Switzerland ( Negrobov & Naglis 2016 ) and Czech Republic (present paper). Status in CZ. The first records are given herein. The specimen from Bílina-Chloumek was erroneously identified as M. impigra by J. Olejníček and recorded as such by Olejníček & Barták (1997) . Ecology. Arboreal species, preferring deciduous trees (Pollet et al. 2009).