Maladera teinzoana ( Brenske, 1898 )

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 : 90

Maladera teinzoana ( Brenske, 1898) group

Key to species of the Maladera teinzoana ( Brenske, 1898) group occurring in China (³³):

1 Eyes small, ratio diameter/ interocular width <0.69.......................................................... 2

1’ Eyes large, ratio diameter/ interocular width> 0.7............................................................ 3

2 Phallobase with a long lateral apical apophysis. Parameres strongly asymmetrical, long and narrow.......................................................................................... Maladera futschauana ( Brenske, 1897)

2’ Phallobase without a long lateral apical apophysis. Parameres subsymmetrical and long.. Maladera obscurata (Moser, 1915)

3 Antennal club in male short, as long as, or only little longer than the remaining antennomeres combined................ 6

3’ Antennal club in male long, at least 1.2 times as long as the remaining antennomeres combined, or longer............... 4

4 Metatibia with a complete, serrate line beside dorsal margin, at least in basal half................................... 5

4’ Metatibia without a complete, serrate line beside dorsal margin.............. M. longruiensis Ahrens, Fabrizi & Liu , sp. n.

5 Antennal club in male straight. Parameres and phallobase asymmetrical, left paramere with a long filiform internal basal lobe........................................................... Maladera shengqiaoae Ahrens, Fabrizi & Liu , sp. n.

5’ Antennal club in male reflexed. Parameres and phallobase symmetrical, parameres without basal lobes........................................................................... Maladera fereobscurata Ahrens, Fabrizi & Liu , sp. n.

6 Basal group of metatibia spines at just before the middle of metatibial length................................................................................................ Maladera parobscurata Ahrens, Fabrizi & Liu , sp. n.

6’ Basal group of metatibia spines well behind the middle of metatibial length........................................ 7

7 Parameres short, less than 1/3 of phallobasal length........................................................... 8

7’ Parameres long, more than half of phallobasal length...................... Maladera saitoi ( Niijima & Kinoshita, 1927)

8 Each paramere without a lateral tooth apically. Parameres straight...................... Maladera piceola (Moser, 1915)

8’ Each paramere with an lateral tooth apically. Parameres reflexed..................... Maladera invenusta ( Moser, 1918)