Microserica avicula (Arrow, 1946) Ahrens & Liu & Lukic & Bai, 2023

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 : 37

Microserica avicula group

Key to species of the Microserica avicula group (♁♁):

1 Phallobase at apex with one or two dorsal processes.......................................................... 2

- Phallobase at apex without dorsal processes................................................................. 4

2 Dorsal process simple, not split at apex........................ Mic. multipunctata Ahrens, Lukic & Liu, new species

- Dorsal process double or split at apex..................................................................... 3

3 Phallobase at apex with two dorsal processes...................... Mic. paravicula Ahrens, Lukic & Liu, new species

- Phallobase at apex with one dorsal process that is split into two tips before apex. ................................................................................................. Mic. avicula (Arrow, 1946) new combination

4 Dorsal surface and elytra yellow, with multiple small dark spots, almost glabrous.................................. 5

- Dorsal surface and elytra brown, without dark spots, elytra with sparse white scales................................. 8

5 Insertion of left paramere displaced dorsally at phallobase..................................................... 6

- Insertion of left paramere lateral......................................................................... 7

6 Left paramere subequal in length to the right one. Antennal club 1.5 times as long as remaining antennomeres combined.............................................................. Mic. cucphuong Ahrens, Lukic & Liu, new species

- Left paramere much shorter than the right one. Antennal club little longer than remaining antennomeres combined................................................................... Mic. ferestictica Ahrens, Lukic & Liu, new species

7 Antennal club slightly shorter, 1.7 times as long as remaining antennomeres combined. Left paramere shorter and stouter........................................................... Mic. hieroglyphica Ahrens, Lukic & Liu, new species

- Antennal club longer, twice as long as remaining antennomeres combined. Left paramere longer and narrower................................................................... Mic. caiyangheana Ahrens, Lukic & Liu, new species

8 Left paramere very short, less than half as long as right one................................................................................................ Mic. costisquamosa (Ahrens, Fabrizi & Liu, 2019) new combination

- Left paramere longer, subequal in length to the right one................ Mic. vinden Ahrens, Lukic & Liu, new species