Trichromothrips, Priesner, 1930

Li, Yajin, Li, Zhengyue & Zhang, Hongrui, 2019, Trichromothrips genus-group (Thysanoptera, Thripidae) from China, with descriptions of three new species and ten new records, Zootaxa 4544 (1), pp. 79-92 : 80-81

Key to Trichromothrips species from China

(* indicates species placed in the key from descriptions)

1. Fore wing first vein with complete setae ( Fig. 21 ); abdominal tergites II–VIII with about 4–6 setae in a regular or irregular transverse row.............................................................................. moundi sp.n.

-. Fore wing first vein with median long gap in setal row and two setae distally; abdominal tergites II–VIII without such setae. 2

2. Abdominal sternites with discal setae ( Fig. 41 )......................................................... indicus

-. Abdominal sternites without discal setae................................................................... 3

3. Fore wing banded with three dark areas, alternating with three light areas ( Figs 45, 46 ).............................. 4

-. Fore wing not banded, uniformly dark or pale at apex ( Figs 25, 29 ).............................................. 5

4. Base of fore wing shaded including anterior margin ( Fig. 44 ); antennal segment III with apical 2/3 brown, IV brown on apical 4/5, V mainly brown except a small basal area ( Fig. 48 )................................................... falcus

-. Base of fore wing not shaded along anterior margin ( Fig. 45 ); antennal segments III–V yellow at base and brown on apical half ( Fig. 49 )..................................................................................... trifasciatus

5. Body yellow except head ( Figs 36, 37 ); pronotum ( Figs 37, 38 ) without dark stripe (except antidesmae ); abdominal tergites never brown or with brown areas laterally; abdominal sternite II with two pairs of posteromarginal setae................ 6

-. Body bicolored, at least pronotum with dark stripe ( Fig. 22 ); abdominal tergites brown at least on segments VII–IX ( Figs 4, 6 ); abdominal sternite II with three pairs of posteromarginal setae................................................. 11

6. Head strongly constricted behind compound eyes ( Fig. 40 ).................................................. albus

-. Head not strongly constricted behind compound eyes ( Fig. 27 ).................................................. 7

7. Abdominal tergites with brown areas laterally ( Figs 4, 6, 9 ).................................................... 8

-. Abdominal tergites almost yellowish white ( Figs 3, 10 )........................................................ 9

8. Abdominal tergites II–VIII brown medially ( Fig. 9 ).................................................... crispator

-. Abdominal tergites V–VI with a coarse-grained dark area on each side.................................... xanthius *

9. Head and pronotum with dark stripe laterally ( Fig. 27 )........................................... antidesmae sp.n.

-. Head and pronotum without dark stripe laterally............................................................ 10

10. Head pale brown between compound eyes; postocular III setae minute metanotal campaniform sensilla absent.... assamensis

-. Head fully brown; postocular setae well-developed; metanotal campaniform sensilla present..................... fragilis

11. Mesonotum with median and submedian setae near posterior margin ( Fig. 27 ).................................... 12

-. Mesonotum with median setae in front of submedian setae ( Fig. 24 )............................................ 13

12. Abdominal sternite VII with posteromarginal setae arising at posterior margin......................... trachelospermi *

-. Abdominal sternite VII with posteromarginal setae arising in front of posterior margin........................ taiwanus *

13. Head and pronotum with dark lateral margins; male with 6–8 pore plates on abdominal sternites III–VII........... priesneri

-. Head dark brown or with small median area slightly paler along posterior margin dorsally, pronotum with dark lateral margins; male with 5 pore plates or with numerous irregularly scattered circular pore plates on abdominal sternites III–VII ( guizhouensis male unknown).................................................................................... 14

14. Head uniformly dark brown; pronotum with dark brown lateral stripes, median triangular pale area not reaching anterior margin ( Fig. 22 )............................................................................ guizhouensis sp.n.

-. Head dark brown, often with a small median area slightly paler along posterior margin dorsally; pronotum with dark brown lateral stripes, median triangular pale area reaching anterior margin ( Fig. 36 )....................................... 15

15. Abdominal tergite VIII with two small setae in front of posteroangular setae, tergite IX without CPS; male sternites III–VII with numerous irregularly scattered circular pore plates.................................................. elegans

-. Abdominal tergite VIII with one small setae in front of posteroangular setae, tergite IX with one pair of CPS; male sternites III–VII with five pore plates....................................................................... formosus

Figures

FIGURES 13–21. Trichromothrips moundi sp.n.(13) Head and pronotum. (14) Male sternites IV–VII. (15) Male tergites VIII– X. (16) Tergites II–III of female. (17) Mesonotum and metanotum. (18) Abdominal tergites VIII of female. (19) Female sternites VI–VII. (20) Antennae. (21) Fore wing.

FIGURES 40–50. Trichromothrips genus-group species. (40) T. albus head and pronotum. (41) T. indicus male abdominal sternites III–VII. (42) T. elegans male abdominal tergites VIII–X. (43) Laplothrips bicolor fore wing. (44) T. falcus fore wing. (45) T. trifasciatus fore wing. (46) T. indicus fore wing. (47) Trachynotothrips striatus antennae. (48) T. falcus antennae. (49) T. trifasciatus antennae. (50) O. bhattii abdominal tergite IV.

FIGURES 22–30. Trichromothrips species. T. guizhouensis sp.n. 22–26: (22) Head and pronotum. (23) Abdominal tergites III–X. (24) Mesonotum and metanotum. (25) Fore wing. (26) Antennae. T. antidesmae sp.n. 27–30: (27) Head and pronotum. (28) Male abdominal tergites IX–X. (29) Fore wing. (30) Antennae.

FIGURES 31–39. Head and pronotum of Trichromothrips genus-group species. (31) Laplothrips bicolor. (32) Yoshinothrips pasekamui. (33) Octothrips bhatti. (34) Trachynotothrips striatus. (35) Trichromothrips falcus. (36) T. elegans. (37) T. crispator. (38) T. trifasciatus. (39) T. indicus.

FIGURES 1–12. Trichromothrips genus-group species. Trichromothrips species 1–11: (1) T. moundi female. (2) T. moundi male. (3) T. albus. female (4) T. guizhouensis sp.n. female (5) T. indicus female. (6) T. elegans female. (7) T. elegans male. (8) T. trifasciatus female. (9) T. crispator female. (10) T. antidesmae sp.n. female. (11) T. assamensis female. (12) Trachynotothrips striatus female.