Rohdendorfia dimorpha Smirnov, 1924

Mengual, Ximo & Barkalov, Anatolij V., 2019, Two new species of Rohdendorfia (Diptera: Syrphidae) from Central Asia, Acta Entomologica Musei Nationalis Pragae 59 (1), pp. 325-336 : 331-333

Rohdendorfia dimorpha Smirnov, 1924

Material examined. KIRGYZSTAN: 1♁ 1♀, Alajskij range, environs of Taldyk Pass, 3620–3750 m, 16.vii.2003,V.Zinchenko [ ZFMK, ZFMK- DIP-00019931, ...19932]. TAJIKISTAN: 64 ♁♁ 4 ♀♀, Varzobskoe gorge, 4 km NE kishlak Kalon, 3375 m, 39.08° N 68.86° E, 6.vii.2017, A. Barkalov & V. Zinchenko [ ISEA].

Rohdendorfia montivaga Violovitsh, 1984 Material examined. KIRGYZSTAN: 1 ♁ 1 ♀, Kashgaria, Osh region, upper reaches of the of Mal’tabar stream, 18.vii.2003, V. Zinchenko [ ZFMK, ZFMK-DIP-00019929, ...19930]; 1 ♀, Terskej Alatoo Mt. R., SW of Chon-Asuu Pass, 3720 m, 42°23′N 79°04′E, 15.viii.2004, D. Milko [ ISEA]; 4♀♀, Southern Kirgizia,Alai Ridge, Taldyk Pass, 3800 m, 39°46′ N 73°10′E, 12.vii.2000, D. Milko [ ISEA]; 1 ♀, Southern Kirgizia, Alai Ridge, S slope, Shiman Pass, 3800 m, 39°39′ N 72°14′E, 24.vii.2003, D. Milko [ ISEA]; 2 ♀♀, Southern Kirgizia, Transalaj Mt. Ridge, Turparkol lake, 4650 m, 39°30′N 72°57′E, 22–23.vii.2003, D. Milko [ ISEA]; 1 ♀, Southern Kirgizia,Transalaj Mt. Ridge, 1km W Taunmurun Pass, 3260 m, 39°38′N 73°37′E, 21.vii.2003, D. Milko [ ISEA]; 1♁, Ak-Shyirak, W Mt. Ridge, N slope, ca. Besh-Kol Lake, 1960 m, 41°23′N 74°28′E, 22–29. vii.2003, D. Milko [ ISEA].

Key to species of the genus Rohdendorfia (Modified from BARKALOV & NIELSEN 2010).

1 Eyes widely separated on frons: females ( Figs 4, 7 , 20, 23 ). .................................................................................... 6

– Eyes meeting on frons: males ( Figs 2, 6 , 19, 22 ). ........ 2

2 Protibia with long pile ventrally (Fig. 25). Male genitalia as in Figs 15–17 . Distribution: European Alps, northern Caucasus, Altai, Sayan. ................. R. alpina Sack, 1938

– Protibia with short pile ventrally ( Figs 6 , 22 ). ............ 3

3 Metafemur only with dark short (mostly adpressed) pile, without long erect pile anteroventrally (Fig. 27). Male genitalia as in Figs 28–29 . Distribution: Pamirs, Alai. ................................... R. dimorpha Smirnov, 1924

– Metafemur with long pile anteroventrally ( Figs 8 , 24 , 26)......................................................................................4

4 Metafemur with long erect pale pile anteroventrally, as long as width of metafemur (Fig. 26). Male genitalia as in Figs 30–32 : in lateral view, surstylus with broad basal part and strong curvature medially ( Fig. 31 ); in dorsal view, surstylus broad basally, narrows towards apical part ( Fig. 30 ). Distribution: Tian Shan, Kyrgyz Kashgaria, Dzungarian Alatau. ........................................ .................................... R. montivaga Violovitsh, 1984

– Metafemur with some long pale pile anteroventrally, shorter than width of metafemur ( Figs 8 , 24 ). Male genitalia not as above ( Figs 9–14 ). ................................... 5

5 Surstylus in lateral view with long, curved posterodorsal lobe ( Fig. 13 ), in dorsal view with posterodorsal lobe bent in apical third ( Fig. 12 ). Distribution: West Pamir. ......................... R. khakimovi Barkalov , sp. nov.

– Surstylus in lateral view with slightly curved, medially narrowed posterodorsal lobe ( Fig. 10 ), in dorsal view with posterodorsal lobe not bent ( Fig. 9 ). Distribution: Ladakh. ................................ R. bella Mengual , sp. nov.

6 Face without vittae of grey pollinosity, OR at most with triangular maculae of grey pollinosity on dorsal part of face, joint with pollinosity along eye margin (Fig. 33). Black fascia on posterior margin of abdominal terga 3–4 narrows and sometimes completely peters out towards lateral margin. Distribution: European Alps, northern Caucasus, Altai, Sayan. .......... ........................................................ R. alpina Sack, 1938

– Face with two longitudinal vittae of grey pollinosity, from frons to mouth edge ( Figs 7 , 23 , 34). Black maculae or fascia on posterior margin of abdominal terga broadened towards lateral margin ( Figs 4, 5 , 20, 21 ). .......... 6

6 Frons with grey pollinose vittae widen dorsally, forming triangular macula on each side ( Figs 23 , 35). ...... .................................. R. khakimovi Barkalov , sp. nov.

– Frons with grey pollinose vittae narrow, not forming triangular maculae ( Figs 7 , 34, 36). ............................. 7

7 Distribution: Pamirs, Alai. ............................................... ......................................... R. dimorpha Smirnov, 1924

– Distribution: Tian Shan, Kyrgyz Kashgaria, Dzungarian Alatau. ..................... R. montivaga Violovitsh, 1984

– Distribution: Ladakh. ......... R. bella Mengual , sp. nov.

Figs 25–27.25 – Rohdendorfia alpina Sack, 1938 , male (ZFMK-DIP-00019928), proleg, lateral view. 26 – Rohdendorfia montivaga Violovitsh, 1984 , male (ZFMK- DIP-00019929), metaleg, lateral view. Scale bars = 0.5 mm. 27 – Rohdendorfia dimorpha Smirnov, 1924 , male (ZFMK-DIP-00019931), lateral view. Scale bars = 1 mm.

Figs 33–36.33 – Rohdendorfia alpina Sack, 1938 , female (ZFMK- DIP-00019933), head, frontolateral view. 34 – R. dimorpha Smirnov, 1924 , female (ZFMK- DIP-00019932), head, frontolateral view. 35 – R. khakimovi Barkalov , sp. nov., female, head, dorsal view. 36 – R.montivaga Violovitsh, 1984 , female, head, dorsal view. Scale bars = 0.5 mm.

Figures

Figs 2–8. Rohdendorfia bella Mengual, sp. nov. 2–3 – holotype male (ZFMK-DIP-00027140). 2 – dorsal view; 3 – lateral view. 4–5 – paratype female (ZFMK-DIP-00027194); 4 – dorsal view; 5 – lateral view. 6 – holotype male, frontal view. 7 – paratype female (ZFMK-DIP-00027194), frontal view. 8 – holotype male, metaleg, lateral view. Scale bars: 2–5 – 1 mm, 6–8 – 0.5 mm..

Figs 18–24. Rohdendorfia khakimovi Barkalov, sp.nov.18–19 – paratype male (ZFMK-DIP-00055236):18 – dorsal view;19 – lateral view.20–21 – paratype female (ZFMK-DIP-00055237):20 – dorsal view; 21 – lateral view.22 – paratype male (ZFMK-DIP-00055236), frontal view.23 – paratype female (ZFMK- DIP-00055237), frontal view. 24 – paratype male (ZFMK-DIP-00055236), metaleg and sterna, lateral view. Scale bars: 18–21 – 1 mm, 22–24 – 0.5 mm.

Figs 9–17. Male genitalia. 9–11 – Rohdendorfia bella Mengual, sp. nov. 9 – epandrium, dorsal view; 10 – epandrium, lateral view; 11 – hypandrium, lateral view. 12–14 – Rohdendorfia khakimovi Barkalov, sp. nov. 12 – epandrium, dorsal view; 13 – epandrium, lateral view; 14 – hypandrium, lateral view. 15–17 – Rohdendorfia alpina Sack, 1938 (adapted from CLAUSSEN 1988). 15 – epandrium, dorsal view; 16 – epandrium, lateral view; 17 – hypandrium, lateral view. Scale bars = 0.2 mm.

Figs 28–32. Male genitalia. 28–29 – Rohdendorfia dimorpha Smirnov, 1924 (adapted from BARKALOV & NIELSEN 2010). 28 – epandrium, dorsal view; 29 – epandrium, lateral view. 30–32 – R. montivaga Violovitsh, 1984 (adapted from BARKALOV & NIELSEN 2010). 30 – epandrium, dorsal view; 31 – epandrium, lateral view; 32 – hypandrium, lateral view.