Lygistorrhina (Probolaeus)

KEY TO EXTANT AND FOSSIL SPECIES OF SUBGENUS LYGISTORRHINA (PROBOLAEUS) WILLISTON 1896 1. Wing membrane entirely hyaline................................................................................................................ 2 — Wing membrane with dark spots................................................................................................................. 9 2. Sc ending free.............................................................................................................................................. 3 — Sc ending in C............................................................................................................................................ 4 3. Antenna light brown; each flagellomere with two or more prominent dorsal setae; C extending to half distance between R₅ and M₁; coxa 1 pale with dark basal part; laterotergite with 13-14 setae; abdominal segments 2-5 (sometimes 2-4) with pale posterior band............................. Lygistorrhina santaecatharinae Thompson, 1975. [eastern USA: Alabama, Georgia, North Carolina, South Carolina, Tennessee, Virginia, West Virginia] — Antenna with basal 4-5 flagellomeres pale yellow, remaining brown; each flagellomere with one prominent dorsal seta; fore coxa entirely yellow; laterotergite with 18-20 setae; abdominal segments 1-5 with pale posterior band..................................................... Lygistorrhina brasiliensis Edwards, 1932 [Brazil: São Paulo, Minas Gerais]. 4. First abdominal tergite entirely dark (brown) (sometimes first sternite with narrow pale band)................... 5 — First abdominal tergite pale or with pale posterior band............................................................................. 6 5. Antenna light brown at base, gradually becoming yellow towards apex; M₁ bent anteriorly and slightly sinusoid; fore coxa entirely pale; abdominal segments 2-4 with pale posterior band.......................................................................................................................................................... Lygistorrhina conica n. sp. [French Guiana]. — Antenna entirely dark; M₁ almost straight; fore coxa entirely dark; abdominal segments 2-5 with pale posterior band.................................... Lygistorrhina barrettoi Lane, 1947 [Brazil: Goiás, Mato Grosso, Mato Grosso do Sul] 6. Abdominal segments 1-5 with pale posterior band........................................................................................ 7 — First abdominal tergite entirely pale and segments 2-4 with pale posterior band......................................... 8 7. Flagellomeres 1-5 reddish brown, the rest dark brown; fore coxa entirely yellow; fore basitarsus longer than fore tibia; laterotergite with 13-14 setae; M₁ bent posteriorly.............................................................................................................................................. Lygistorrhina edwardsi Lane, 1947 [Brazil: São Paulo, Minas Gerais]. — Antenna unicolourous (true colour unknown, amber inclusion); fore coxa entirely dark; fore basitarsus shorter than fore tibia; laterotergite with 9-10 setae; M₁ bent anteriorly and sinusoid................................................................................................... Lygistorrhina caribbiana Grund, 2012 [fossil, Miocene: Dominican amber]. 8. Costa extending to more than half distance between R₅ and M₁; M3+4 curved posteriorly; fore basitarsus longer than fore tibia; abdominal segments 1-4 with pale posterior band..................................................................................................................................................... Lygistorrhina singularis (Williston, 1896) [St. Vincent]. — Costa extending to half distance between R₅ and M₁; M3+4 curved anteriorly; fore basitarsus shorter than fore tibia; abdominal segments 1-5 with pale posterior band............................................................................................................................................................................ Lygistorrhina mitarakensis n. sp. [French Guiana]. 9. Sc ending free; segment 6 with pale posterior band (sometimes inconspicuous)........................................ 10 — Sc ending in C; segment 6 entirely dark, without a pale posterior band..................................................... 11 10. Wing with pigmented spots in the middle of the wing and along veins; M₁ bent anteriorly and sinusoid; C extending beyond half distance between R₅ and M₁.......................................................................................................................................................................... Lygistorrhina cerqueirai Lane, 1958 [Brazil: Amazonas]. — Wing with pigmented spot at wing tip only; M₁ bent posteriorly; C extending to half distance between R₅ and M₁.......................................................................................... Lygistorrhina maculipennis n. sp. [French Guiana]. 11. Wing with triangular pigmented spot restricted to anterior part of cell R₅ only......................................... 12 — Wing with pigmented spot extending between R₁ and M₂........................................................................ 13 12. Abdominal segment 1 and 5 completely dark, segments 2-4 with pale posterior band; M₁ and CuA bent posteriorly; laterotergite with 17 setae......................................................................................................................................................................... Lygistorrhina borkenti Huerta & Ibanes-Bernal, 2008 [Mexico: Morelos]. — Abdominal segments 2-5 (and at least sternite of segment 1, but often also tergite 1) with pale posterior band; M₁ almost straight, CuA conspicuously sinusoid; laterotergite with 18-20 setae............................................................................................................................................ Lygistorrhina urichi Edwards, 1912 [Trinidad]. 13. Mediotergite with a pair of pre-apical setae; fore coxa pale yellow with dark brown spot in centre..................................................................................... Lygistorrhina acahuizotla Huerta et al., 2019 [Mexico: Guerrero]. — Mediotergite without setae; fore coxa completely pale yellow............................................................................................................ Lygistorrhina alexi Huerta & Ibanes-Bernal, 2008 [Mexico: Jalisco, Guerrero, Yucatan].
Published as part of Blagoderov, Vladimir & Pollet, Marc, 2020, Diversity of Lygistorrhina (Probolaeus) Williston, 1896 (Diptera: Keroplatidae, Lygistorrhininae) of Mitaraka (French Guiana), with descriptions of three new species, pp. 593-606 in Zoosystema 42 (30) on pages 604-605, DOI: 10.5252/zoosystema2020v42a30, http://zenodo.org/record/4321222
{"references":["WILLISTON S. W. 1896. - On the Diptera of St. Vincent (West Indies). Transactions of the Entomological Society of London 1896: 253 - 446, pl. VIII-XIV.","THOMPSON F. CHR. 1975. - Notes on the genus Lygistorrhina Skuse with description of the first nearctic species (Diptera; Mycetophiloidea). Proceedings of the Entomological Society ofWashington 77 (4): 434 - 445. https: // repository. si. edu / handle / 10088 / 17069","EDWARDS F. W. 1932. - New Brazilian Mycetophilidae (Diptera). Revista de Entomologia (Sao Paulo) 2 (2): 138 - 149.","LANE J. 1947. - New Brazilian Mycetophilidae (Diptera, Nemocera). Revista de Entomologia (Rio de Janeiro) 17 (3): 339 - 360.","GRUND M. 2012. - A long-beaked fungus gnat in Dominican amber (Diptera: Lygistorrhinidae). Annales Zoologici 62 (4): 639 - 642. https: // doi. org / 10.3161 / 000345412 X 659704","LANE J. 1958. - On Amazonian Mycetophilidae (Diptera, Nematocera). Studia Entomologica, Petropolis (N. S.) 1: 209 - 216.","EDWARDS F. W. 1912. - Lygistorrhina urichi, a new Mycetophilid from Trinidad. Annals and Magazine of Natural History, series 8 10: 203 - 204. https: // doi. org / 10.1080 / 00222931208693217","HUERTA H., DZUL MANZANILLA F. & MANRIQUE SAIDE P. C. 2019. - Nueva especie y nuevos registros de Lygistorrhina Skuse de Mexico (Diptera: Lygistorrhinidae). Acta Zoologica Mexicana (N. S.) 35: 1 - 11. https: // doi. org / 10.21829 / azm. 2019.3502156"]}