Caliothrips, Daniel, 1904

Rasool, Iftekhar, Alattal, Yehya Zaki & Aldhafer, Hathal M., 2023, Faunistic inventory, identification keys and zoogeographical analysis of the Thysanoptera-Terebrantia of Saudi Arabia, including two new species, Zootaxa 5306 (2), pp. 151-200 : 163

Key to species of Caliothrips from Saudi Arabia

1. Extreme apex of fore wings sharply pale.................................................................. .. 2

- Extreme apex of fore wings brown....................................................................... 4

2. Head and pronotum with weak markings inside sculptured reticles; head, pronotum, pterothorax and abdominal pleurotergites I–VII yellow.............................................................................. Caliothrips sp.

- Head and pronotum with prominent internal marking within sculptured reticles; head, pronotum and entire abdomen brown to dark brown......................................................................................... .. 3

3. Abdominal tergite IX of male with median pair of setae long and slender; setae on fore wing veins curving towards hind margin; sternal pore plates transverse, broad, length/width in microns 10/95–120, extending beyond the level of posteromarginal S2 setae....................................................................................... luckmanni

- Abdominal tergite IX of male with median pair of setae long and slender; setae on fore wing veins straight; sternal pore plates transverse, narrow, length/width in microns 4-8/45–70, not reaching to level of posteromarginal S2............. sudanensis

4. Abdominal tergites with markings between the lateral striations; head anterior to ocellar triangle with irregular transverse lines of sculpture; fore wings with three pale and four brown bands..................................... quadrifasciatus

- Abdominal tergites without markings between the lateral striations; head anterior to ocellar triangle with transverse or equiangular reticles; fore wings largely brown with only sub-basal and sub-apical pale areas......................... .. 5

5. Fore wings with three thick and dark setae at first vein, two near base, one at apex and 4–5 thick setae at second vein; head with genae convex, reticles on vertex with irregular shapes..................................................... helini

- Fore wing setae normal, rather than thick and dark; head with genae parallel sided, reticles on vertex with cells equiangular in shape.......................................................................................... oneillae