Dicranomyia (Erostrata) Savchenko, 1976

Kato, Daichi, Tachi, Takuji & Gelhaus, Jon, 2018, Revision of the subgenus Dicranomyia (Erostrata) Savchenko, 1976 (Diptera, Limoniidae) of Japan, Zootaxa 4441 (1), pp. 181-194 : 182

Subgenus Dicranomyia (Erostrata) Savchenko, 1976

Erostrata Savchenko in Savchenko & Krivolutskaya, 1976: 130 .

Type species: Dicranomyia globithorax Osten Sacken, 1869 , by original designation.

Head ( Figs. 1–2 ). With anterior part of vertex at narrowest point about 1/2 of width of eye, posterior part with longitudinal groove at middle; antenna relatively long, if bent backward, tip reaching just before or beyond wing base, scape nearly as long as pedicel, flagellomeres spherical at least basal half segments, distal ones slightly longer, each segment with verticils at most three times as long as width of segment; rostrum of head short, about 1/ 3 as long as eye, ventral margin ending above that of eye in lateral view; palpus one or two segmented, shorter than eye.

Thorax. Mesonotum strongly gibbous, about 1/2 as high as pleuron. Wing ( Fig. 3 ) without stigma; vein Sc long, extending to about half length of Rs; R1 crossvein-like, ending in C at a right angle; cell dm closed. Legs with tarsomeres 3 and 4 slightly swollen.

Male genitalia ( Figs. 4 , 14 , 20 , 26 , 29 ). Gonocoxite bearing ventromesal lobe; gonostylus single, with a small protuberance bearing one or two setae on outer surface near base.

Female ovipositor ( Figs. 11 , 17 , 20 , 32 ). Sternite 8 convex on middle of distal 2/3; furca ( Figs. 13 , 19 , 25 , 34 ) triangular in ventral view, directed posteriorly.

Figures

FIGURES 1–3. Head in lateral view and wing. 1: Dicranomyia (Erostrata) submelas sp. nov.; 2: D. (E.) tabashii; 3: D. (E.) globithorax. Scale bars 1–2 = 0.1 mm, 3 = 1 mm. Abbreviations: fl, flagellum; lb, labellum; pd, pedicel; pl, palpus; rs, rostrum; sc, scape.

FIGURES 4–13. Male genitalia of Dicranomyia (Erostrata) globithorax and D. (E.) globulithorax, and female ovipositor of the former species. 4–6, 11–13. D. globithorax (non-type, Japan, Aomori). 7. D. globulithorax (holotype), 8–10, D. globithorax (non-type, USA, Pennsylvania). 4: Male genitalia in dorsal view; 5: Internal structure of male genitalia in dorsal view; 6: Paramere of male genitalia in outer view; 7: Gonostylus in dorsal view; 8: Paramere in dorsal view; 9: Paramere, outer surface; 10: Internal sac on male sternite 7 (non-type, Canada); 11: Female ovipositor in lateral view; 12: Sternite 8 and hypogynial valve in ventral view; 13: Furca in ventral view. Scale bars = 0.1 mm. Abbreviations: aed, aedeagus; cer, cercus; fu, furca; gc, gonocoxite; gs, gonostylus; hyp vlv, hypogynial valve; ma l, mesal-apical lobe; S8, sternite 8; T8–10, tergites 8–10; vm l, ventromesal lobe.

FIGURES 14–19. Male genitalia and female ovipositor of Dicranomyia (Erostrata) reniformis sp. nov. (paratypes, Japan, Fukuoka). 14: Male genitalia in dorsal view; 15: Internal structure of male genitalia in dorsal view; 16: Paramere of male genitalia in outer view; 17: Female ovipositor in lateral view; 18: Sternite 8 and hypogynial valve in ventral view; 19: Furca in ventral view. Scale bars = 0.1 mm.

FIGURES 20–25. Male genitalia and female ovipositor of Dicranomyia (Erostrata) submelas sp. nov. 20: Male genitalia (paratype, Japan, Aichi) in dorsal view; 21: Internal structure of male genitalia in dorsal view; 22: Paramere of male genitalia in outer view; 23: Female ovipositor (paratype, Japan, Fukuoka) in lateral view; 24: Sternite 8 and hypogynial valve in ventral view; 25: Furca in ventral view. Scale bars = 0.1 mm.

FIGURES 26–28. Male genitalia of Dicranomyia (Erostrata) tabashii (non-type, Japan, Tottori). 26: Male genitalia in dorsal view; 27: Internal structure in dorsal view; 28: Paramere in outer view. Scale bars = 0.1 mm.

FIGURES 29–34. Male genitalia and female ovipositor of Dicranomyia (Erostrata) yazuensis sp. nov. 29: Male genitalia (holotype) in dorsal view; 30: Internal structure of male genitalia in dorsal view; 31: Paramere of male genitalia in outer view; 32: Female ovipositor (paratype) in lateral view; 33: Sternite 8 and hypogynial valve in ventral view; 34: Furca in ventral view. Scale bars = 0.1 mm.