Key to Chirothrips species from Iran

1. Antennal segment II symmetrical (Fig. 5); campaniform sensilla on abdominal tergites posterolateral to median setae .............................................................................................................................................................. atricorpus

-. Antennal segment II asymmetrical (Figs 2–4); campaniform sensilla on abdominal tergites usually anterolateral to median setae (Fig. 22, 23) ............................................................................................................................................. 2

2. Sensorium on antennal segment IV forked................................................................................................................... 3

-. Sensorium on antennal segment IV simple................................................................................................................... 4

3. Tergites II–VII posterior margin with continuous craspedum bearing long broad lobes (Fig. 23); antennal segment I without dorsal transverse ridge (Fig. 6), II with apex almost acute ........................................................... meridionalis

-. Tergites II–VII posterior margin with series of small tubercle-like lobes (Fig. 21); antennal segment I with transverse ridge dorsally (Fig. 2), II with apex softly rounded ........................................................................................ aculeatus

4. Tergites II–VII posterior margins with row of widely spaced microtrichia (Fig. 24); antennal segment I with median dorsal setal pair closer together than width of base of segment II (Fig. 9) ....................................................... molestus

-. Tergites II–VII posterior margins with distinct craspedum (Figs 20, 25); antennal segment I with median dorsal setal pair wider apart than width of base of segment II (Figs 10, 11) ................................................................................... 5

5. Tergite I with craspedum present only on median third of posterior margin (Fig. 25)................................. kurdistanus

-. Tergite I with craspedum complete across posterior margin ...........................................................“ manicatus group”