Macrothripina

Okajima, Shûji & Masumoto, Masami, 2023, Six genera of the subtribe Macrothripina from Southeast Asia to Taiwan (Thysanoptera, Phlaeothripidae, Idolothripinae), Zootaxa 5291 (1), pp. 1-74 : 6

Key to genera of Macrothripina from Asia

1. Pelta D-shaped, without lateral wings.......................................................... Dichaetothrip s

- Pelta wider, usually broadly triangular or trilobed............................................................ 2

2. Pronotum with a hook ventrally at each anterior angle; posterior margin of pronotum distinctly protruded posteriorly in male; two short and stout setae arising on small tubercles behind each eye in male; fore coxae with large recurved tubercle in male; inner surface of fore femora with pale stout setae................................................... Macrothrips

- Not as above......................................................................................... 3

3. Prosternal ferna large, longer than broad ( Fig. 195 ); fore femora extremely developed, inner surface with numerous small tubercles widely and densely scattered at least in female....................................... Fernothrips gen. n.

- Prosternal ferna normal, wider than long; fore femora moderately developed, usually unarmed, if inner surface armed with tubercles, tubercles are arranged in a row, not widely scattered................................................. 4

4. Fore tibia with an inner subapical tubercle in both sexes.......................................... Diaphorothrips

- Fore tibia with or without an inner tubercle, if present it is situated apically, not subapically.......................... 5

5. Anteocellar setae well developed, much longer than postocellar setae; fore femur with row of tubercles or teeth on inner margin in female (often in male).................................................................... Machatothrips

- Not above combination of characters...................................................................... 6

6. Antennal segment III shorter than segment IV (cf. Fig. 10 ); sense-cones usually long and curved, but rarely shorter....... 7

- Antennal segment III longer than segment IV, or subequal in length; sense-cones usually short....................... 10

7. Maxillary stylets not reaching eyes, wider apart, V-shaped..................................... Ethirothrips (in part)

- Maxillary stylets reaching eyes, slightly apart or close together................................................. 8

8. Antennae 7-segmented, with incomplete suture between morphological segments VII and VIII; maxillary stylets about 1/3 of head width apart; posterior margin of pelta concave medially......................................... Peltariothrips

- Antennae 8-segmented; head much longer than broad; maxillary stylets close together medially; posterior margin of pelta not concave............................................................................................. 9

9. Head strongly elevated dorsally along midline, longer than 2.2 times as long as broad (cf. Figs 1 & 15 ); cheeks without ommatidium-like structure.................................................................. Aesthesiothrips

- Head slightly elevated dorsally, shorter than 2.0 times as long as broad; cheeks each with an ommatidium-like structure near middle.................................................................................... Tarassothrips

10. Head with a pair of ommatidium-like structures on cheeks ventro-laterally near base (cf. Fig. 203 ); maxillary stylets deeply retracted to eyes, close together (cf. Fig. 204 ); metanotum and pelta weakly sculptured.................. Polytrichothrips

- Not above combination of characters..................................................................... 11

11. Head elongate, usually longer than 2.0 times as long as broad; cheeks each with a largely developed ommatidium-like structure just behind eye; postocellar setae elongate......................................................... Celidothrips

- Head variable in length, if longer than 2.0 times as long as broad, postocellar setae short; ommatidium-like structure, if present, slightly developed.................................................................................... 12

12. Fore femora unarmed; inner margin of fore tibia not ridged.................................... Ethirothrips (in part)

- Fore femur with a row of small tubercles on inner margin in both sexes ( Figs 198 & 199 ); inner margin of fore tibia with a line of ridge................................................................................... Ischyrothrips

Figures

FIGURES 190–195. Fernothrips femoralis gen. et sp. n., female. (190) Head & prothorax; (191) antennal segments III–VIII; (192) fore leg; (193) tube; (194) metanotum & pelta; (195) prosternum.

FIGURES 8–14. Aesthesiothrips elongatus sp. n., female. (8) Head; (9) eyes, ventral surface; (10); antena; (11) fore tibia and tarsus; (12) ferna & mesopresternum; (13) metanotum & pelta; (14) tube.

FIGURES 1–7. Aesthesiothrips breviconus sp. n., female. (1) Head & prothorax; (2) eyes, ventral surface; (3) antenna; (4) prosternum & mesopresternum; (5) metanotum & pelta; (6) fore tibia and tarsus; (7) tube.

FIGURES 15–20. Aesthesiothrips jatrophae, female. (15) Head & prothorax; (16) eye, ventral surface; (17) antenna; (18) fore tibia and tarsus; (19) metanotum & pelta; (20) tube.

FIGURES 203–210. Polytrichothrips malayanus sp. n., female. (203) Fore tarsus; (204) ommatidium-like structure; (205) head & prothorax; (206) antenna; (207) prosternum & mesopresternum; (208) mesonotum to pelta; (209) abdominal segment IX & tube; (210) abdominal tergites III–IV.

FIGURES 196–202. Ischyrothrips crassus. (196) Head & prothorax, female; (197) antenna, female; (198) fore leg, female; (199) fore leg, male; (200) metanotum & pelta, female; (201) mesopresternum, female; (202) tube, female.