Chrysolina ivanovi, Mikhailov, 2022

KEY FOR DETERMINATION OF CHRYSOLINA View in CoL ( IMMARGINATA)

SPECIES GROUP

1 (6) Aedeagus massive and broad, with spoon-shaped or strongly shortened apex. Male body length on average not less than 6.5 mm.

2 (3) Aedeagus apical projection spoon-shaped and dilated at bent down apex. Dorsum moderately shining, black with bronze reflection, rarely without metallic reflection ( Figs 6–8). Elytral epipleura and sometimes lateral stripe brown. Body length 5.7–7.3 mm (males), 6.8–8.3 mm (females). Northern and Central Tien-Shan in the limits of SE

Kazakhstan, eastern Kyrgyzstan (mainly Issyk-Kul region) and Xinjiang in China. From foothill steppes in Almaty region up to 2700–3400 m a.s.l. On Artemisia ............................................................... Ch. immarginata

3 (2) Aedeagus apical projection short, broad, with rounded apex.

4 (5) Dorsum slightly shining, black with weak metallic luster ( Fig. 9). Antennae and tarsi brown. Body length 6.7 mm (male). SW Kyrgyzstan: Alaisky Mt. range, 3400 m a.s.l. ................................................................... Ch. alaiensis

5 (4) Dorsum shining, greenish bronze, elytral epipleura and lateral stripe reddish ( Figs 12–13). Body length 6.5 mm (male), 7.2 mm (female). China: Xinjiang, Karlyktag Mt. range ...................................................... Ch. dieckmanni

6 (1) Aedeagus smaller with narrow apical projection. Male body length 6.3 mm.

7 (8) Dorsum dark bronze with strong metallic reflection. Pronotum distinctly broadened anteriorly and narrowed basally ( Fig. 11). Tarsi moderately dilated. China: Xinjiang, Bogdo-Ula Mt. range , 2800–3485 m a.s.l........... ........................................................................ Ch. luchti

8 (7) Dorsum black with bronze reflection. Pronotum evenly rounded laterally ( Fig. 10). Tarsi very slightly dilated. East Kazakhstan: sands eastwards of Lake Alakol ........ ............................................................ Ch. ivanovi sp.n.

Acknowledgements. I am grateful to Dr. Alexei Moseyko ( ZIN, St.- Petersburg, Russia), Dr. Stephan Blank and Mandy Schröter ( Senckenberg Deutsches Entomologisches Institut , Müncheberg, Germany) for the opportunity to work with the collections and kindly provided photos of the types, special thanks to Dr. Kirill Makarov ( Moscow Pedagogical State University, Russia) for taking photos of other beetles .