Scirtothrips, Shull, 1909

Rachana, R. R., Amarendra, B. & Sushil, S. N., 2024, A new species and a new record of the genus Scirtothrips (Thysanoptera, Thripidae) from India, Zootaxa 5537 (3), pp. 424-430 : 425

Key to Scirtothrips species from India

[*based on original description.]

1. Abdominal sternites II–VI with numerous rows of microtrichia extending medially across at least on the posterior half..... 2

-. Abdominal sternites II–VI with rows of microtrichia not extending medially but restricted to lateral areas............... 6

2. Abdominal sternites II–VI with complete posteromarginal comb of microtrichia; male tergite IX with drepanae... donumdei

-. Abdominal sternites II–VI with no posteromarginal comb of microtrichia; male tergite IX without drepenae............. 3

3. Abdominal sternites with pale transverse antecostal ridge............................................. pteridicola *

-. Abdominal sternites with dark transverse antecostal ridge......................................................4

4. Antecostal ridge on abdominal tergites III–VII dark but interrupted medially.................................. hitam *

-. Antecostal ridge on abdominal tergites III–VII not interrupted medially.......................................... 5

5. Abdominal tergites with median area and antecostal ridge dark, lateral microtrichial fields with 3 discal setae....... dorsalis

-. Abdominal tergites with median area and antecostal ridge pale, lateral microtrichial fields with 4–5 discal setae.................................................................................................... oligochaetus *

6. Postocular setal row with one pair of postocular setae longer than remaining setae mesad of compound eyes ( Fig. 14 ); fore wing with posteromarginal cilia straight; metathoracic spinula recurved to each side at apex ( Fig. 22 ); male tergite IX without drepanae....................................................................................... machili

-. Postocular setal row with two pairs of postocular setae longer than remaining setae mesad of compound eyes ( Fig. 4 ); fore wing with posteromarginal cilia straight or wavy; metathoracic spinula not recurved at apex; male tergite IX with or without drepanae............................................................................................ 7

7. Lateral microtrichial fields of abdominal tergites with 4 setae; male tergite IX with drepanae.......................... 8

-. Lateral microtrichial fields of abdominal tergites with 3 setae; male tergite IX with or without drepanae................. 9

8. Ocellar setae III placed anterior to tangent between anterior margins of hind ocelli; abdominal tergites with antecostal ridge pale; fore wing with posteromarginal cilia wavy; metanotum reticulate................................... mangiferae

-. Ocellar setae III on or just within anterior margins of ocellar triangle; abdominal tergites with antecostal ridge dark; fore wing with posteromarginal cilia straight; metanotum transversely striate at anterior, longitudinally striate medially....... .. fulleri *

9. Ocellar setae III at the tangent between the fore and hind ocelli, close to fore ocelli; fore wing with posteromarginal cilia wavy at tips; male tergite IX with drepanae................................................................ quercus *

- Ocellar setae III placed between the hind ocelli or anterior to hind ocelli, on tangent between anterior margins of hind ocelli; fore wing with posteromarginal cilia straight; male tergite IX with or without drepanae............................. 10

10. Ocellar setae I absent; male tergite IX with drepanae............................................... .. malayensis *

-. Ocellar setae I present; male tergite IX with or without drepanae............................................... 11

11. Metanotum transversely striate at anterior, longitudinally striate medially; pronotal postero marginal seta II twice as long as seta I; male tergite IX without drepanae.............................................................. lami sp. nov.

-. Metanotum reticulate; pronotal postero marginal seta II at least 2.5 times as long as seta I; male tergite IX with drepanae.. 12

12. Ocellar setae III placed between the hind ocelli towards the posterior margin of hind ocelli; pronotal postero marginal seta II 3.5–4 times longer than seta I; fore wing second vein with one seta; tergites VIII and IX with microtrichia medially.................................................................................................... bispinosus

-. Ocellar setae III placed anterior to hind ocelli, just at the line of anterior margin of hind ocelli; pronotal postero marginal seta II 2.5–3 times longer than seta I; fore wing second vein with 3 setae; tergites VIII and IX without median microtrichia................................................................................................ kenyensis *

Figures

FIGURES 13–18. Scirtothrips machili Masumoto & Okajima (13) Female; (14) Head, dorsal; (15) Fore wing; (16) Antenna; (17) Pronotum; (18) Meso and metanotum.

FIGURES 19–22. Scirtothrips machili Masumoto & Okajima (19) Female abdominal tergite VIII; (20) Female abdominal tergites III–VI; (21) Female abdominal tergites IX–X; (22) Metasternum.

FIGURES 1–6. Scirtothrips lami sp. nov. (1) Female; (2) Male; (3) Pronotum; (4) Head, dorsal; (5) Antenna; (6) Meso and metanotum.