Parorthocladius

Liu, Yuedan & Wang, Xinhua, 2005, (Diptera: Chironomidae: Orthocladiinae), Zootaxa 802, pp. 1-8 : 7

Key to males of the genus Parorthocladius

1. Inferior volsella single .................................................................................................. 2

– Inferior volsella double ................................................................................................ 4

2. Tibialspurofmiddleandhindlegssingle; analpointsmall,triangular,andpointedapically .................................................................................................... P. toyamajekeus (Sasa)

– Tibial spur of middle and hind legs double; anal point blunt apically .......................... 3

3. AR<1; wing anal lobe normally developed, without prominent projection; virga absent; inferior volsella oval ...................................................... P. nudipennis (Kieffer)

– AR> 2; wing anal lobe strongly produced; small virga present; inferior volsella small and finger­like ........................................................ P. furudoquartus (Sasa & Arakawa)

4. Middle and hind legs with single tibial spur; pseudospurs present on tarsomeres I–III of middle and hind legs; anal point with truncated apex .............. P. unicentrus sp. nov.

– Middle and hind legs with double tibial spurs; pseudospurs present on tarsomeres I–II of middle and hind legs; anal point tapered .................................................................. 5

5. Body brown; tergite IX with long setae; transverse sternapodeme with oral projection; dorsal part of inferior volsella triangular; crista dorsalis weak ..... P. concretus sp. nov.

– Body blackish; tergite IX bare; transverse sternapodeme without oral projection; dorsal part of inferior volsella rounded; crista dorsalis projecting ........ P. cristatus sp. nov.