Archeohomaloplia frolovi Ahrens, 2011

Additional material examined. 2 ♂♂ “Dol. r. Tunk-goho 22-VII-93 Potanin/ Paratypus Arch. medvedevi Nikolajev 1982 ” (ZIN).

Updated key to the species of Archeohomaloplia (♂♂)

1 Hypomeron not carinate. Metatarsomere 1 shorter than the following tarsomere. Elytra and legs black ................................................................................. 2

1’ Hypomeron finely carinate. Metatarsomere 1 longer than the following tarsomere. Elytra dark brown, legs brownish ....................................................... 14

2 Disc of pronotum with numerous long, erect setae .. ................................................................................. 3

2’ Disc of pronotum without long setae. .................... 7

3 Setae on pronotum and elytra long, twice as long as ocular diameter ................... A. frolovi Ahrens, 2011

3’ Setae on pronotum and elytra moderately long, as long as ocular diameter .......................................... 4

4 Dorsal apophysis of aedeagus narrow .................... 5

4’ Dorsal apophysis of aedeagus wide and truncate at apex ............................................ A. xiajuan sp. nov.

5 Dorsal apophysis of aedeagus moderately long and straight (dorsal view). Setae on elytra shorter than intervals wide. Posterior angles of pronotum blunt. 6

5’ Dorsal apophysis of aedeagus strongly bent backwards at middle forming a sharp hook. Setae on elytra almost as long as intervals wide. Posterior angles of pronotum obsolete .................................... ...................................... A. hebashana Ahrens, 2011

6 Right paramere strongly bent twice, behind basal third and shortly before apex .................................... .................... A. yunnana (Miyake & Yamaya, 2001)

6’ Right paramere strongly bent once only, behind basal third ......................... A. ganhaiziensis Ahrens, 2011

7 Basal marginal line almost complete medially ...... 8

7’ Basal marginal line widely interrupted medially... 12

8 Sides of clypeus strongly convex, basally slightly convergent, showing a distinct angle with the ocular canthus. Body size larger than 7 mm. Aedeagus with large lateral apophysis .............................................. ................................ A. abbreviata (Fairmaire, 1897)

8’ Clypeus widest at base, angle between sides of clypeus and ocular canthus blunt and indistinct. Body size smaller than 6 mm ................................. 9

9 Tegument of pronotum smooth and very shiny. ... 10

9’ Tegument of pronotum micro-reticulate (80x) and slightly dull .......................... A. kalabi Ahrens, 2011

10 Dorsal apophysis of phallobase short, much shorter than the apex of phallobase wide ............................. ........................................ A. nikolajevi Ahrens, 2011

10’ Dorsal apophysis of phallobase long, almost as wide as the apex of phallobase ...................................... 11

11 Posterior angles of pronotum and anterior angles of labroclypeus blunt..... A. medvedevi Nikolajev, 1982

11’ Posterior angles of pronotum obsolete. Anterior angles of labroclypeus convex .................................. ................................. A. yaregongensis Ahrens, 2011

12 Setae on elytra distinctly shorter than elytral intervals wide. Dorsal apophysis of phallobase wide at base .. .............................................................................. 13

12’ Setae on elytra as long as elytral intervals wide. Dorsal apophysis of phallobase all over narrow and tube-shaped .................... A. safraneki Ahrens, 2011

13 Dorsal apophysis of phallobase simple, not reflexed around its axis, sharply narrowed and pointed at apex. Right paramere divided in a dorsal and ventral lobe ....................................... A. mingi Ahrens, 2011

13’ Dorsal apophysis of phallobase reflexed around its axis, not sharply narrowed and pointed at apex. Right paramere simple, not divided in a dorsal and ventral lobe ........................... A. volkovitchi sp. nov.

14 Antennal club slightly reflexed, almost twice as long as the remaining antennomeres combined. Tibiae and tarsi yellowish brown ........................................ .................................. A. taunggyiensis Ahrens, 2011

14’ Antennal club straight, almost 1.5 × as long as the remaining antennomeres combined. Tibiae and tarsi brown .................................... A. acuta Ahrens, 2011