Iteaphila, Zetterstedt

Sinclair, Bradley J. & Shamshev, Igor V., 2021, World revision of Iteaphila with unbranched radial vein (Diptera: Empidoidea: Iteaphilidae), Zootaxa 4968 (1), pp. 1-89 : 80-81

Key to Iteaphila with unbranched radial vein (R 4+5) from the Palaearctic Region

1 Male [unknown for I. caelebs ].......................................................................... 2

- Female [unknown for I. falki sp. nov., I. kyrgyzstanensis sp. nov., I. sakhalinensis sp. nov., I. aktruensis sp. nov.]........ 16

2 Eyes dichoptic....................................................................................... 3

- Eyes holoptic........................................................................................ 4

3 Stylus not much longer than wide; terminalia almost entirely yellow ( Fig. 13 ).................... I. dichoptica sp. nov.

- Stylus much longer than wide; terminalia very dark..................................... I. kyrgyzstanensis sp. nov.

4 Epandrium oval, with broad dorsal bridge connecting lamellae and narrow, dorsally directed surstylus; hypandrium clothed with short shiny projections ( Fig. 21 ).................................................... I. beringiensis sp. nov.

- Epandrium narrowed, longer than wide, prolonged posteriorly, with narrow dorsal bridge and posteriorly directed surstylus; hypandrium not clothed with short shiny projections......................................................... 5

5 Surstylus held erect to epandrium ( Figs 45 , 56 , 61 , 75 )........................................................ 6

- Surstylus directed posteriorly ( Figs 29, 30 )................................................................. 9

6 Surstylus very narrow and shiny ( Figs 61 , 75 )............................................................... 7

- Surstylus broader, round and narrow apically ( Figs 45 , 56 )..................................................... 8

7 Surstylus hook-like, shorter than cercus ( Fig. 75 )............................................ I. zontaki (Nowicki)

- Surstylus elongate and straight, as long as cercus ( Fig. 61 )...................................... I. miranda sp. nov.

8 Surstylus tapered to narrow point ( Fig. 56 ); cercus broad with posterior, subapical lobe ( Fig. 57 ); phallus slightly arched and broad at apex........................................................................... I. spinosa sp. nov.

- Surstylus digitiform with rounded tip; cercus narrow without posterior, subapical lobe; phallus strongly arched and slender at apex ( Fig. 45 ).......................................................................... I. gracilis sp. nov.

9 Anepisternum and katepisternum with shiny spot on middle.................................................. 10

- Anepisternum and katepisternum greyish pollinose.......................................................... 11

10 Apex of phallus narrowed, directed horizontally and slightly sinuous; hypoproct process elongate; hypandrium with subapical subtriangular projection ( Fig. 29 )........................................................... I. bartaki sp. nov.

- Apex of phallus not narrowed, evenly curved ventrally; hypoproct process short; hypandrium evenly curved subapically ( Fig. 30 )..................................................................................... I. falki sp. nov.

11 Phallic guide long, produced beyond epandrium as far as phallus, well visible in situ ( Figs 32 , 53 ).................... 12

- Phallic guide short, not produced beyond epandrium, not visible in situ ( Figs 60 , 67 )............................... 13

12 Tibiae and usually halteres yellowish; cercus short, as long as surstylus; phallic guide subequal in width to phallus ( Fig. 53 )..................................................................................... I. luteitibia sp. nov.

- Tibiae and halteres dark; cercus long, longer than surstylus; phallic guide broader than phallus ( Fig. 32 ).. I. ribesii (Becker)

13 Phallus bent subapically nearly 90°, directed straight before arched apically ( Fig. 67 )............ I. oedalina (Zetterstedt)

- Phallus not bent subapically nearly 90°, gradually arched and curved apically ( Figs 59, 60 , 70 )....................... 14

14 Surstylus broad with rounded apex; phallus often projected well beyond epandrium ( Fig. 60 )............ I. incus sp. nov.

- Surstylus narrow, hook-like; phallus arched along margin of epandrium ( Figs 59 , 70 ).............................. 15

15 Phallus prolonged, arched to hypandrium ( Fig. 59 ).......................................... I. aktruensis sp. nov.

- Phallus not prolonged, arched to apex of epandrium ( Fig. 70 )............................... I. sakhalinensis sp. nov.

16 Halteres pale........................................................................................ 17

- Halteres dark........................................................................................ 19

17 Antennal stylus (excluding apical sensillum) distinctly longer than wide........... I. spinosa sp. nov., I. luteitibia sp. nov.

- Antennal stylus (excluding apical sensillum) about as long as wide............................................. 18

18 Scutum viewed anteriorly subshiny, finely pollinose......................................... I. dichoptica sp. nov.

- Scutum viewed anteriorly densely pollinose...... I. gracilis sp. nov., I. caelebs (Becker) , I. oedalina (Zetterstedt) [in part]

19 Antennal stylus (excluding apical sensillum) about as long as wide............................................. 20

- Antennal stylus (excluding apical sensillum) distinctly longer than wide......................................... 21

20 Anepisternum and katepisternum shiny...................................................... I. bartaki sp. nov.

- Anepisternum and katepisternum dull with pruinescence................................................................................................. I. zontaki (Nowicki) , I. oedalina (Zetterstedt) [in part], I. incus sp. nov.

21 Sternite 8 shiny..................................................................... I. beringiensis sp. nov.

- Sternite 8 with pruinescence............................................................... I. ribesii (Becker)

Figures

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 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 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.

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.