Iteaphilidae, Sinclair & Shamshev, 2021

Sinclair, Bradley J. & Shamshev, Igor V., 2021, World revision of Iteaphila with unbranched radial vein (Diptera: Empidoidea: Iteaphilidae), Zootaxa 4968 (1), pp. 1-89 : 12

Key to genera and species groups (males only) of Iteaphilidae

1 Postpedicel with broad base, with apical half tapered; stylus comprises two articles, shorter or longer than half length of postpedicel with apical sensillum greatly reduced in length; scutellum with 2–3 pairs of apical setae; male hind femur usually modified; wing with basal costa seta present; cell dm produced apically ( Fig. 10 ); male terminalia with epandrial lobe ventral to distinctly digitiform surstylus........................................................ Paraiteaphila gen. nov.

- Postpedicel elongate and nearly parallel-sided; stylus usually short and quadrate, one-articled with distinct apical sensillum; scutellum with more than 3 pairs of apical setae; male legs unmodified; basal costal seta absent; cell dm usually truncate apically ( Figs 7 , 8 , 11 ); male terminalia without epandrial lobe; surstylus hook-like.......... Iteaphila ................ 2

2 Epandrial bridge broad, at least one-quarter length of epandrium ( Figs 21–24 )................. I. bulbosa species group

- Epandrial bridge narrow, less than one-quarter length of epandrium.............................................. 3

3 Phallus elongate, extending beyond and around epandrium ( Figs 7 , 36 )...................... I. nitidula species group

- Phallus shorter, extending little beyond epandrium........................................................... 4

4 Phallic guide with jagged margin; postgonite usually extended to dorsal margin of epandrium ( Figs 37, 38 , 41–48 , 53–58 ).................................................................................... I. nupta species group

- Phallic guide without jagged margin; postgonite not extended to dorsal margin of epandrium......................... 5

5 Apex of phallus greatly expanded into funnel or cup-shape ( Figs 9 , 77, 78 )..................... I. stentor species group

- Apex of phallus not expanded........................................................................... 6

6 Hypoproct without paired processes................................................. I. triangula species group

- Hypoproct with paired processes......................................................................... 7

7 Phallus with recurved apex; phallic guide without spine-like microtrichia; shaft of phallus without internal skeleton pattern ( Figs 59–61 , 67–70 , 75 )............................................................ I. oedalina species group

- Phallus with straight or gently curved apex; phallic guide often with spine-like microtrichia; shaft of phallus often with internal skeleton pattern ( Figs 29–32 )...................................................... I. macquarti species group

Figures

FIGURES 8–10. Species of Paraiteaphila and Iteaphila with unbranched R 4+5, lateral view. 8, I. longipalpis, male, scale bar = 1 mm; 9, I. parastentor, male, scale bar = 0.5 mm; 10, Paraiteaphila sp., female, scale bar = 0.75 mm.

FIGURES 5–7. Species of Iteaphila with unbranched and branched R 4+5, lateral view. 5, I. oedalina, male; 6, I. oedalina, male; 7, I. nitidula, male. Scale bar = 1 mm. Abbreviations: R4—upper branch of third branch of radius; R 5 —lower branch of third branch of radius; R —third branch of radius.

FIGURES 11–14. Species of Iteaphila with unbranched R 4+5. 11, I. beringiensis sp. nov., male, lateral view, scale bar = 1 mm; 12, I. bartaki sp. nov., male, lateral view, scale bar = 1 mm; 13, I. dichoptica sp. nov., male holotype, lateral view, scale bar = 0.5 mm; 14, I. flavipilosa, female, dorsal view, lateral view, scale bar = 0.5 mm.

FIGURES 21–25. Male terminalia of Iteaphila with unbranched R 4+5. 21, I. beringiensis sp. nov., lateral view; 22, I. bifida sp. nov., lateral view, with arrow indicating apex of phallus in posterior view; 23, I. recta sp. nov., lateral view; 24, I. tribulosa sp. nov., lateral view; 25, same, apex of hypandrium, posterior view. Scale bar = 0.1 mm. Abbreviations: cerc—cercus; epand— epandrium; epand brg—epandrial bridge; hypd—hypandrium; ph—phallus; sur—surstylus.

FIGURES 36–40. Male terminalia of Iteaphila with unbranched R 4+5, lateral view. 36, I. longiphallus sp. nov.; 37, I. arnaudi sp. nov.; 38, I. bayarea sp. nov.; 39, same, apex of hypandrium, posterior view; 40, Iteaphila sp., apex of hypandrium, posterior view. Scale bar = 0.1 mm. Abbreviations: pgt—postgonite; ph—phallus; ph gd—phallic guide; sur—surstylus.

FIGURES 41–44. Male terminalia of Iteaphila with unbranched R 4+5, lateral view. 41, I. brooksi sp. nov.; 42, I. dichoptica sp. nov.; 43, I. flavipilosa (Coquillett); 44, I. glabricula sp. nov. Scale bar = 0.1 mm.Abbreviations: ej apod—ejaculatory apodeme; goncx apod—gonocoxal apodeme; pgt—postgonite; ph—phallus; ph gd—phallic guide.

FIGURES 45–48. Male terminalia of Iteaphila with unbranched R, lateral view. 45, I. gracilis sp. nov.; 46, I. grandis sp. 4+5 nov.; 47, I. lolo sp. nov.; 48, I. longipalpis (Melander). Scale bar = 0.1 mm. Abbreviations: cerc—cercus; epand brg—epandrial bridge; hyprct proc—hypoproct process; ph—phallus; ph gd—phallic guide; sur—surstylus.

FIGURES 53–57. Male terminalia of Iteaphila with unbranched R 4+5. 53, I. luteitibia sp. nov., lateral view; 54, I. nupta (Melander), lateral view; 55, I. sierrensis sp. nov., lateral view; 56, I. spinosa sp. nov., lateral view; 57, same, left cercus, dorsal view. Scale bar = 0.1 mm. Abbreviations: cerc—cercus; hypd—hypandrium; hyprct proc—hypoproct process; ph—phallus; ph gd—phallic guide; sur—surstylus.

FIGURES 58–61. Male terminalia of Iteaphila with unbranched R, lateral view. 58, I. subnupta sp. nov.; 59, I. aktruensis 4+5 sp. nov.; 60, I. incus sp. nov.; 61, I. miranda sp. nov. Scale bar = 0.1 mm. Abbreviations: pgt—postgonite; ph—phallus; sur—surstylus.

FIGURES 75–78. Male terminalia of Iteaphila with unbranched R 4+5. 75, I. zontaki (Nowicki), lateral view; 76, same, phallus, dorsal view; 77, I. parastentor sp. nov., lateral view; 78, I. stentor (Melander), lateral view. Scale bar = 0.1 mm. Abbreviations: ph—phallus; sur—surstylus.

FIGURES 66–70. Male terminalia of Iteaphila with unbranched R. 66, I. oedalina (Zetterstedt), posterior view; 67, same, 4+5 lateral view; 68, I. polygyna (Melander), lateral view; 69, I. recurvata sp. nov., lateral view; 70, I. sakhalinensis sp. nov., lateral view. Scale bar = 0.1 mm. Abbreviations: pgt—postgonite; ph—phallus; sur—surstylus.

FIGURES 29–32. Male terminalia of Iteaphila with unbranched R 4+5, lateral view. 29, I. bartaki sp. nov.; 30, I. falki sp. nov.; 31, I. kyrgyzstanensis sp. nov.; 32, I. ribesii (Becker). Scale bar = 0.1 mm. Abbreviations: cerc—cercus; ej apod—ejaculatory apodeme; goncx apod—gonocoxal apodeme; hypd—hypandrium; hyprct proc—hypoproct process; i apod—inner apodeme; ph—phallus; ph gd—phallic guide; sur—surstylus.