Male imago of Synorthocladius spp. Chaetotaxy of tergites II–VI of A S. federicoi sp. nov. B S. semivirens. S. federicoi sp. nov. C hypopygium in dorsal view D tergite IX and anal point in lateral view E megaseta, dorsal F gonostylus, other aspect in ventral view G hypopygium, ventral H inferior volsella I virga. S. semivirens J tergite IX and anal point in lateral view K anal point, dorsal L, M inferior volsella, two aspects. The arrows indicate some distinguishing characters.

 
 
  Part of: Lencioni V, Moubayed J (2021) Synorthocladius federicoi sp. nov., a new species occurring in the middle basin of the Adige River, northern Italy (Diptera, Chironomidae, Orthocladiinae). ZooKeys 1057: 105-116. https://doi.org/10.3897/zookeys.1057.68175