Prosoeca is a genus of tangle-veined flies in the family Nemestrinidae. It was described in 1867 by Ignaz Rudolph Schiner. It was assigned to the family Nemestrinidae by Frank M. Carpenter in 1992; and to the subfamily Nemestrininae by Mike Mostovski and Xavier Martínez-Delclòs in 2000.

Species The genus Prosoeca has at least 41 species: Prosoeca accincta (Wiedemann, 1830) Prosoeca atra (Macquart, 1846) Prosoeca beckeri Lichtwardt, 1920 Prosoeca caffraria Lichtwardt, 1910 Prosoeca circumdata Lichtwardt, 1910 Prosoeca connexa Bezzi, 1924 Prosoeca difficile (Bequaert, 1925) Prosoeca flavipennis Lichtwardt, 1910 Prosoeca florigera (Scudder, 1878) Prosoeca fusca (Loew, 1860) Prosoeca ganglbaueri Lichtwardt, 1910 Prosoeca handlirschi Lichtwardt, 1910 Prosoeca ignita Bezzi, 1924 Prosoeca lata Lichtwardt, 1910 Prosoeca lichtwardti Bezzi, 1924 Prosoeca longipennis (Loew, 1858) Prosoeca longirostris (Macquart, 1846) Prosoeca macularis (Wiedemann, 1828) Prosoeca major Bezzi, 1924 Prosoeca marinusi Barraclough, Colville, Karolyi & Krenn, 2018 Prosoeca minimum (Bezzi, 1924) Prosoeca nigripes (Macquart, 1840) Prosoeca nitidula Bezzi, 1924 Prosoeca obscura (Westwood, 1835) Prosoeca oldroydi Hull, 1958 Prosoeca olivacea Brunetti, 1929 Prosoeca ornata Lichtwardt, 1910 Prosoeca peringueyi Lichtwardt, 1920 Prosoeca pygmea Hull, 1958 Prosoeca quinque Lichtwardt, 1920 Prosoeca robusta Bezzi, 1924 Prosoeca rubicunda Bezzi, 1924 Prosoeca saxea Mostovski & Martínez-Delclòs, 2000 Prosoeca sublineata Bequaert, 1926 Prosoeca torquata Theron, 2020 Prosoeca umbrosa Lichtwardt, 1910 Prosoeca variabilis (Loew, 1858) Prosoeca variegata (Loew, 1858) Prosoeca westermanni (Wiedemann, 1821) Prosoeca willowmorensis Lichtwardt, 1910 Prosoeca zuluensis Lichtwardt, 1920

One extinct species in a subgenus of Prosoeca exists: †Prosoeca (Palembolus) saxea Mostovski & Martínez-Delclòs, 2000

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