Trichromoithrips moundi, Li & Li & Zhang, 2019

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 : 84-85

Trichromoithrips moundi sp.n.

(Figs 1,2, 13–21)

Female macroptera. Body bicolored ( Fig. 1 ); head, metanotum, abdominal segments II–III &VII brown; mesonotum and abdominal segment I light brown; pronotum and abdominal tergites IV–VI and VIII–X yellow; antennae brown, III pale, the apex of IV–VI also VII–VIII light brown ( Fig. 20 ); fore wing brown with sub-basal, median and apex white, clavus brown ( Fig. 21 ); all legs pale.

Head longer than wide, slightly constricted just behind compound eyes; ocellar setae I absent, ocellar setae II sub-equal to setae III or sometimes slightly shorter than setae III, setae III situated at tangent of posterior margin of hind ocelli ( Fig. 13 ); four pairs of postocular setae present. Compound eyes without pigmented ommatidia. Mouthcone short and rounded at apex with 3-segmented maxillary palpi. Antennae ( Fig. 20 ) 8-segmented, segment I with two dorsal apical setae, III and IV each with forked sense cone, III–VI with microtrichia, VIII longer than VII. Pronotum ( Fig. 13 ) distinctly sculptured with transverse striae, two small circular striae on posterior third; two pairs of posteroangular setae and two pairs of posteromarginal setae developed; Prosternal ferna not divided at middle. Mesonotum ( Fig. 17 ) smooth at anterior, with transverse striate sculpture on posterior 2/3; median pair of setae near posterior margin. Metascutum ( Fig. 17 ) transversely reticulate medially; campaniform sensilla absent; median pair of setae behind anterior margin. Both meso- and metasternal furca with spinula, slightly weak on metasternum; sternopleural sutures present. Fore wing first and second veins each with complete row of setae; clavus usually with 4–5marginal setae and 1–2discal setae; posteromarginal cilia wavy ( Fig. 21 ). Tarsi 2- segmented.

Abdominal tergites smooth, with a few striae on anterior half, posteromarginal craspeda and ctenidia absent; lateral area of tergites II–VIII with about 4–6 setae in a regular or irregular transverse row; tergites II–VII with three setae (S3 to S5 setae) arranged in a straight line along lateral margin ( Figs 16, 18 ); tergite VIII without posteromarginal comb; tergite IX with posterior pair of CPS and SB2 setae absent; tergite X without median split; sternites without posteromarginal craspeda, sternite VII with two discal setae laterally in front of setae S2 and S3 ( Fig. 19 ); sternites II–VII each with 3 pairs of posteromarginal setae in front of post margin( Fig. 19 ); laterotergites without discal setae.

Measurements (holotype female in microns). Distended body length 1697. Head length 110, width across cheeks 149; width across eyes 127; ocellar setae III length 21. Pronotum median length 149, width 204; posteroangular setae length, inner 45, outer 43; posteromarginal setae I length 40. Metascutum median setae length 23. Fore wings 1054. Antennal segments I to VIII length as follows: 20, 34, 56, 51, 46, 64, 14, 20.

Male macroptera. General structure and colour similar to female ( Fig. 2 ). Abdominal tergite IX with a pair of long posteromarginal drepanae ( Fig. 15 ); sternites III–VIII each with some scattered small pore plates, all posteromarginal setae situated on post margin, no discal setae present ( Fig. 14 ).

Measurements (paratype male in microns). Distended body length 1394. Head length 88, width across cheeks 134; width across eyes 105; ocellar setae III length 29. Pronotum median length 118, width, 175; posteroangular setae length, inner 42, outer 42; posteromarginal setae I length 40. Metascutum median setae length 15. Fore wings 881. Antennal segments I to VIII length as follows: 21, 28, 47, 44, 40, 56, 15, 18.

Specimens studied. Holotype female, CHINA, Guizhou, Tongren City, Fanjingshan National Nature Reserve, from bamboo, 11.viii.2017 (YajinLi), in collection of Yunnan Agricultural University , Kunming ;

Paratypes: 1 female, 1 male, same data as holotype . 1 male and 1 female deposited in Australian National Insect Collection, Canberra.

Etymology. The species is in honor of Dr. Laurence Mound for his assistance and his excellent work on taxonomy of thrips.

Comments. This new species differs from the other Trichromothrips species in having the fore wing with two complete rows of setae, and abdominal tergites II–VIII with about 4–6 setae in a regular or irregular transverse row. Otherwise, the female of T. moundi with two discal setae laterally on sternite VII can also be distinguished from caespitis section.

Figures

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.

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.