Amiserica insperata (Brenske)

Ahrens, Dirk, Liu, Wangang, Pham, Phu Van & Fabrizi, Silvia, 2021, An overview on the genus Amiserica Nomura, 1974 (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), Zootaxa 5050 (1), pp. 1-63 : 56-58

Amiserica insperata (Brenske) group

Checklist of the species:

Amiserica chiangdaoensis Ahrens, 2003: 66 .

Amiserica flavolucida Ahrens, 2003: 66 .

Amiserica hunliana Ahrens & Fabrizi, 2016: 50 .

Amiserica insperata (Brenske, 1898) : 357.

Amiserica langbianensis Ahrens, 2003: 67 .

Amiserica lii Ahrens, 2003: 66 .

Amiserica malickyi Ahrens, 2003: 66 .

Amiserica manipurensis Ahrens, 1999: 236 .

Amiserica mawphlangensis Ahrens, 1999: 235 .

Amiserica michaeli Ahrens & Fabrizi, 2011: 156 .

Amiserica nanensis Ahrens, 2003: 66 .

Amiserica nokrekensis Ahrens, 2003: 66 .

Amiserica omeiensis Ahrens, 2003: 67 .

Amiserica pardalis (Arrow, 1946) : 8.

Amiserica rejseki Ahrens, 2003: 66 .

Amiserica schoedli Ahrens & Pacholátko, 2005: 314 .

Amiserica semipunctata Ahrens, 1999: 238 .

Amiserica similissima Ahrens & Pacholátko, 2005: 311 .

Amiserica sparsesetosa Ahrens, 1999: 239 .

Key to the species of the Amiserica insperata (Brenske) group (♂♂)

1 Antenna with nine antennomeres........................................................................ 11

- Antenna with ten antennomeres.......................................................................... 2

2 Dorsal body surface with iridescent shine, with a few single long and erect setae................................... 3

- Dorsal body surface dull, with a few single moderately long or short setae........................................ 5

3 Metatibia moderately long and narrow, ratio width/length> 1/3.5................................................ 4

- Metatibia long and narrow, ratio width/length: 1/4.5.................................. A. semipunctata Ahrens, 1999

4 Metatibia moderately long and narrow, ratio width/length: 1/3.5. Parameres distally weakly widened and strongly curved ventrally at apex................................................................... A. flavolucida Ahrens, 2003

- Metatibia shorter and wider, ratio width/length: 1/2.9. Parameres distally not widened and weakly curved ventrally at apex................................................................... A. similissima Ahrens & Pacholátko, 2005

5 Lateral ventral lamina of phallobase evenly elevated longitudinally. Intervals of elytra with a few single narrow, scale-like setae............................................................................................... 6

- Lateral ventral lamina of phallobase neither elevated longitudinally nor with longitudinal tubercles.................... 8

6 Left paramere distinctly wider than the right one (dorsal view). Antennal club 1.3 times as long as remaining antennomeres combined.................................................................... A. nokrekensis Ahrens, 2003

- Left paramere nearly of the same width as the right one (dorsal view). Antennal club 1.5 times as long as remaining antennomeres combined....................................................................................... 7

7 Parameres at apex bluntly truncate............................................. A. mawphlangensis Ahrens, 2003

- Parameres at apex sharp................................................... A. hunliana Ahrens & Fabrizi, 2016

8 Phallobase with a small tubercle ventrally on each side before apex.............................................. 9

- Phallobase without any tubercle ventrally................................................................. 10

9 Dorsal pilosity less dense. Ventral apical mesal incision of ventral phallobase abruptly narrowed. Apex of parameres strongly curved (lateral view)...................................................... A. michaeli Ahrens & Fabrizi, 2011

- Dorsal pilosity dense. Ventral apical mesal incision of ventral phallobase evenly narrowed. Apex of parameres moderately curved (lateral view)............................................................ A. insperata (Brenske, 1898)

10 Phallobase distinctly narrowed towards apex (lateral view). Parameres distinctly widened at middle compared to its base and apex (dorsal view)............................................................ A. manipurensis Ahrens, 2003

- Phallobase equal in width in apical quarter (lateral view). Parameres almost constant in width over their entire length (dorsal view)................................................................ A. schoedli Ahrens& Pacholátko, 2005

11 Antennal club twice as long as remaining antennomeres combined and strongly reflexed. Phallobase relatively short and robust............................................................................ A. nanensis Ahrens, 2003

- Antennal club at maximum 1.5 times as long as remaining antennomeres combined................................ 12

12 Antennal club short, only about as long as remaining antennomeres combined.................... A. rejseki Ahrens, 2003

- Antennal club ca 1.5 times as long as remaining antennomeres combined........................................ 13

13 Phallobase apically moderately produced, at apex in the right side longer than at the left side. Parameres at apex curved hooklike ventrally.................................................................. A. sparsesetosa Ahrens,1999

- Phallobase apically well produced. Parameres at apex only weakly curved ventrally................................ 14

14 Pronotum widest at middle. Phallobase only weakly bent in apical third (lateral view). Basal lobe of left paramere narrow and in a right angle to main axis of paramere............................................... A. malickyi Ahrens, 2003

- Pronotum widest at base. Phallobase considerably bent in apical third, dorsoventrally widened preapically (lateral view), at apex widely rounded.................................................................................. 15

15 Phallobase mesoventrally with a distinctly elevated longitudinal lamella. Left paramere laterally with a rastered area............................................................................................ A. lii Ahrens, 2003

- Phallobase ventrally without any elevated longitudinal lamella................................................. 16

16 Basal lobe of left paramere round or oval in cross-section.................................................... 17

- Basal lobe of left paramere strongly flattened, and more or less concavely curved.................................. 18

17 Basal lobe of left paramere narrow and distally with a few fine teeth................... A. chiangdaoensis Ahrens, 2003

- Basal lobe of left paramere wide, almost in a right angle to main axis of paramere, and distally rounded (without teeth)..................................................................................... A. pardalis (Arrow, 1946)

18 Right paramere apically sharply pointed........................................... A. langbianensis Ahrens, 2003

- Right paramere apically truncate, and slightly rounded externally.......................... A. omeiensis Ahrens, 2003