Microserica quadrimaculata, Brenske, 1894

Ahrens, Dirk, Liu, Wangang, Lukic, Daniel & Bai, Ming, 2023, A taxonomic review of Microserica Brenske, 1894 from continental Asia (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), Zootaxa 5241 (1), pp. 1-115 : 46-47

Microserica quadrimaculata group

Key to species of Microserica quadrimaculata group on mainland Asia (♁♁):

1 Right paramere reduced in size compared to the left one, generally smaller or at least equal in size. Body short-oval...... 4

- Right paramere larger than the left one. Body elongate........................................................ 2

2 Dorsal surface of body simply shiny......................... Mic. vipinglangensis Ahrens, Lukic & Liu, new species

- Dorsal surface of body dull or iridescent shiny.............................................................. 3

3 Dorsal surface black............................................................. Mic. panzona Ahrens, 2005

- Dorsal surface bicolored, elytra reddish brown.................................... Mic. soppongensis Ahrens, 2005

4 Body larger, ca 9 mm; color uniformly reddish brown............... Mic. banlaoana Ahrens, Lukic & Liu, new species

- Body smaller 7 mm; and/or multicolored................................................................... 5

5 Elytra reddish brown, with more or less extended dark spots................................................... 8

- Elytra dark brown, without dark spots but unicolored. ........................................................ 6

6 Left paramere triangular (lateral view). Right paramere without tiny basal lobe................................................................................................. Mic. namnao Ahrens, Lukic & Liu, new species

- Left paramere not triangular but subparallel over almost all its length (lateral view). Right paramere with a tiny basal lobe.. 7

7 Apex of the left paramere at apex bifid. ............................. Mic. viengvai Ahrens, Lukic & Liu, new species

- Apex of the left paramere evenly broadely rounded. .............. Mic. chaiyaphum Ahrens, Lukic & Liu, new species

8 Apex of the right paramere exceeding by dimensions the one of the left................... Mic. larutensis Ahrens, 2003

- Apex of the right paramere not much exceeding the one of the left............................................... 9

9 Left paramere half as long as phallobase (lateral view)............................. Mic. quadripustulata Moser, 1915

- Left paramere less than a quarter as long as phallobase (lateral view).................. Mic. malaccensis (Brenske, 1893)