Key to the Iranian species of the genus Synaptus

1. Body flattened on disc (Fig. 4); apex of parameres not sinuate (Fig. 6); sclerotized plates of female genitalia asymmetric (Fig. 8 a, b)........................................................................... Synaptus iranicus sp. nov.

- Body not flattened on disc (Fig. 5); apex of parameres sinuate (Fig. 7); sclerotized plates of female genitalia symmetric (Fig. 9)....................................................................................... S. filiformis Fab.