Maladera egregia (Arrow, 1946)

Fabrizi, Silvia, Liu, Wan-Gang, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2021, A monograph of the genus Maladera Mulsant & Rey, 1871 of China (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), Zootaxa 4922 (1), pp. 1-400 : 105

Maladera egregia (Arrow, 1946) group

Key to species of the Maladera egregia (Arrow, 1946) group occurring in China (³³):

1 Left and right paramere fused basally.............................................. Maladera hmong Ahrens, 2004

1’ Left and right paramere fused throughout length............................................................. 2

2 Dorsal body surface dull................................................................................ 3

2’ Dorsal body surface iridescent........................................................................... 4

3 Apical margin of elytra convex. Fused parameres wide, nearly as wide as width of phallobase... Maladera levis (Frey, 1972)

3’ Apical margin of elytra slightly concave. Fused parameres narrow, half as wide as width of phallobase.............................................................................. Maladera tiachiensis Ahrens, Fabrizi & Liu , sp. n.

4 Dorsolateral apical process of phallobase straight or weakly convex, directed mesally............................... 5

4’ Dorsolateral apical process of phallobase strongly reflexed, directed externally................................................................................................... Maladera gusakovi Ahrens, Fabrizi & Liu , sp. n.

5 Dorsolateral apical process of phallobase apically sharply pointed............................................... 6

5’ Dorsolateral apical process of phallobase apically rounded. Fused left and right paramere with two pointed apices..................................................................... Maladera yakouensis Ahrens, Fabrizi & Liu , sp. n.

6 Fused left and right paramere more or less flattened in apical third.............................................. 7

6’ Fused left and right paramere over circular in cross section the apical third.................................................................................................. Maladera pseudoegregia Ahrens, Fabrizi & Liu , sp. n.

7 Dorsolateral apical process of phallobase strongly exceeding the left side lateral lamina of phallobase.................. 8

7’ Dorsolateral apical process of phallobase not or weakly exceeding the left side lateral lamina of phallobase............. 10

8 Fused left and right paramere sharply carinate ventrally............... Maladera laocaiensis Ahrens, Fabrizi & Liu , sp. n.

8’ Fused left and right paramere not carinate ventrally........................................................... 9

9 Fused left and right paramere without blunt teeth laterally at middle, weakly bent laterally. Basal group of setae of metatibia well basad of middle................................................. Maladera tiani Ahrens, Fabrizi & Liu , sp. n.

9’ Fused left and right paramere on each side with blunt teeth laterally at middle, straight. Basal group of setae of metatibia shortly behind the middle............................................. Maladera diaolinensis Ahrens, Fabrizi & Liu , sp. n.

10 Apical portion (1/5 of entire length) of fused left and right paramere narrow, tubuliform, uniform in width.......................................................................................... Maladera egregia (Arrow, 1946)

10’ Apical portion (1/5 of entire length) of fused left and right paramere triangular and narrowed towards apex............. 11

11 Dorsolateral apical process of phallobase at apex slightly bent. Apical portion (1/7 of entire paramere length) of fused left and right paramere narrow, tubuliform. Basal group of setae of metatibia well behind the middle................................................................................... Maladera yipinglangensis Ahrens, Fabrizi & Liu , sp. n.

11’ Dorsolateral apical process of phallobase at apex straight. Apical portion (1/7 of entire paramere length) of fused left and right paramere always triangular. Basal group of setae of metatibia at the middle..................................................................................................... Maladera hubeiensis Ahrens, Fabrizi & Liu , sp. n.