Setostylus Matile 1990

Key to the species of Setostylus (based on male adults) 1. Two ocelli.......................................................................................... 2 - Three ocelli......................................................................................... 3 2. Flagellomere 14 with an antennal apicule; gonocoxites with anterior margin not emarginated (Matile 1990: Fig. 919)............................................................................... S. singularis (Lane) [Neotropical] - Flagellomere 14 without an antennal apicule; gonocoxites with anterior margin distinctly emarginated (Matile 1990: Fig. 922)............................................................................ S. bifidus Matile [Neotropical] 3. Wing without pattern.................................................................................. 4 - Wing with distinct patterns............................................................................. 9 4. Scutellum without bristles.............................................................................. 5 - Scutellum covered with bristles.......................................................................... 6 5. Tergite 9 longer than wide (Matile 1990: Fig. 936); tarsus I 1.5 times longer than the tibia. S. rufobrunneus Matile [Oriental] - Tergite 9 wider than long (Matile 1990: Fig. 937); tarsus I 2.5 times longer than the tibia..... S. bispinosus Matile [Oriental] 6. Scutum with pattern................................................................................... 7 - Scutum without pattern; flagellomere 14 cordiform apically (Papp et al. 2006)................ S. alienus Papp [Oriental] 7. Scutum with two stripes............................................................................... 8 - Scutum with three stripes; tergite 9 subpentagonal (Fig. 2).............................. S. tridigitus sp. n. [Oriental] 8. Scape and pedicel dark brown; palpus brown; tergites 2–4 somewhat transparent (Fig. 4)...... S. triumphus sp. n [Oriental] - Scape and pedicel reddish brown; palpus reddish brown; tergites 2–4 with a large yellow basal spot on both sides (Matile 1990)......................................................................... S. stubbsi Matile [Oriental] 9. Posterior margin of tergite 9 emarginated................................................................. 10 - Posterior margin of tergite 9 rounded.................................................................... 11 10. R +M fusion longer than the stem of median fork; gonostylus dorsomedially with a small, semi-transparent, posterodorsallyprojecting tooth (Huerta & Fitzgerald, 2020: Figs 2, 3D)........................ S. xoxo Huerta & Fitzgerald [Nearctic] - R +M fusion equal to half the stem of median fork; gonostylus dorsomedially without tooth (Matile 1990: Fig. 921)................................................................................ S. pictipennis Matile [Neotropical] 11. Goncoxites with posterior margin emarginated............................................................. 12 - Goncoxites with posterior margin not emarginated, with two submedian tubercles (Ševčík et al. 2021: Fig. 14A)..................................................................... S. fangshuoi Ševčík, Hippa & Burdíková [Oriental] 12. Wing with light brown fumose along costal edge near apex (Huerta & Fitzgerald, 2020)..................................................................................................... S. bellulus (Williston) [Neotropical] - Wing with light brown fumose along costal edge near anterior apical portion of wing to distinctly marked with brown more broadly............................................................................................ 13 13. Palpus yellow....................................................................................... 14 - Palpus reddish brown; halteres with yellowish stem and black knob (Edwards 1931)...... S. innotatus (Edwards) [Oriental] 14. Costa reaching slightly beyond one-third distance from vein R 4+5 to M 1;gonostylus with a minute projection on dorsoapical part, arcuate projection ventrally (Sasakawa & Tamu 1961: Figs 1–2).......... S. abdominalis (Sasakawa & Tamu) [Palaearctic] - Costa reaching almost midway between R 4+5 to M1; gonostylus without projection (Xu et al. 2007: Figs 5 –6).......................................................................... S. chinensis Cao, Evenhuis & Zhou [Palaearctic]
Published as part of Qi, Lei, Huang, Junhao, Wu, Hong & Wang, Qingyun, 2022, Two new species of Setostylus Matile, 1990 (Diptera: Keroplatidae) from China, pp. 443-450 in Zootaxa 5165 (3) on pages 448-449, DOI: 10.11646/zootaxa.5165.3.9, http://zenodo.org/record/6838620
{"references":["Matile, L. (1990) Recherches sur la systematique et l'evolution des Keroplatidae (Diptera, Mycetophilidae). Memoires du Museum National d'Histoire Naturelle, Series A, 148, 1 - 682.","Papp, L., Merz, B. & Foldvari, M. (2006) Diptera of Thailand. A summary of the families and genera with references to the species representations. Acta Zoologica Academiae Scientiarum Hungaricae, 52 (2), 97 - 269.","Huerta, H. & Fitzgerald, S. J. (2020) A new species of Setostylus Matile and new records of Setostylus bellulus (Williston) (Diptera: Keroplatidae). Zootaxa, 4722 (1), 84 - 90. https: // doi. org / 10.11646 / zootaxa. 4722.1.8","Sevcik, J., Hippa, H. & Burdikova, N. (2021) Just a Fragment of Undescribed Diversity: Twenty New Oriental and Palearctic Species of Sciaroidea (Diptera), including DNA Sequence Data and Two New Fossil Genera. Insects, 13 (1), 19. https: // doi. org / 10.3390 / insects 13010019","Edwards, F. W. (1931) Fauna Sumatrensis. Mycetophilidae (Diptera). Tijdshrift voor Entomologie, 74, 262 - 278.","Sasakawa, M. & Tamu, N. (1961) Japanese Fungivoridae (Diptera) III: New or Little-known fungus gnats from the Tsushima Islands (Agriculture). The scientific reports of Kyoto Prefectural University. Agriculture, 13, 68 - 69.","Xu, H. C., Cao, J., Zhou, Z. J., Wu, H. & Huang, Z. W. (2007) First record of the tribe Keroplatini from China, with descriptions of two new species (Diptera: Keroplatidae). Zootaxa, 1497 (1), 35 - 40. https: // doi. org / 10.11646 / zootaxa. 1497.1.3"]}