Two new genera of black flies (Diptera: Simuliidae) of Korea Author Kim, Sam-Kyu samkyuk@kangwon.ac.kr text Journal of Species Research 2020 2020-02-28 9 1 11 18 journal article 10.12651/JSR.2020.9.1.011 2713-8615 8120496 Key to immatures of Korean species of Prosimulium and Twinnia (with reference to Japanese species) 1. Larva with labral fan absent······················· 2 ( Twinnia ) Larva with labral fan well developed······························· ··············································· 4 ( Prosimulium , Simulium ) 2. Antenna with basal segment dilated (swollen) ············· ······································································ T. cannibora Antenna with basal segment not dilated ························ 3 3. Each abdominal segment with two large dorsolateral dark spots ·················································· T. subtibbelesi Each abdominal segment without dark spots··················· ····································································· T. japonensis 4. Larva with postgenal cleft truncated; prothoracic proleg with lateral sclerite broad and vertical portion well developed; pupa with cocoon amorphous························ ································································ 5 ( Prosimulium ) Larva with postgenal cleft pointed or round, not truncated; prothoracic proleg with lateral sclerite narrow or broad but vertical portion not well developed; pupa with cocoon shoe, boot, or slipper shaped ············· ( Simulium ) 5. Pupa with gill 16 filaments ·· 6 ( hirtipes species-group) Pupa with gill more than 16 filaments ····························· ················································ 8 ( magnum species-group) 6. Dorsal trunk of gill strongly divergent from ventral trunk ··············································································· 7 Dorsal trunk of gill not divergent from ventral trunk ······ ······································································· P. kiotoense 7. Four pairs of gill filaments rising from ventral trunks with a short petiole; larval hypostoma with median tooth prominent ····················································· P. jezonicum One of four pairs of gill filaments rising from ventral trunks sessile; larval hypostoma with median tooth as high as or lower than lateral tooth························· P. kanii 8. Larval antenna with basally swollen abruptly; gill with 38-40 filaments········································· P. apoina Larval antenna gradually tapered toward apex; gill with various filaments ···························································· 9 9. Gill with 46-48 filemants ························· P. sarurense Gill with at most 40 filaments······································ 10 10. Pupa with frons and dorsal surface of the thorax with distinct tubercles ·························································· 11 Pupa with frons and dorsal surface of the thorax without tubercles ···························································· P. kazukii 11. Larval hypostoma with median and lateral teeth equal in length; gill with 26-30 filaments ······················· ····································································· P. karibaense Larval hyposotm with median tooth distinctly longer and higher than lateral tooth; gill with 22-25 filaments ·· ········································································ P. yezoense