Trichromothrips guizhouensis,

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: 83-84

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Trichromothrips guizhouensis


Trichromothrips guizhouensis  sp.n.

( Figs 4View FIGURES 1–12, 22–26View FIGURES 22–30)

Female macroptera. Body bicolored ( Fig. 4View FIGURES 1–12); head uniformly dark brown ( Fig. 22View FIGURES 22–30); antennal segments I–II dark brown, III–V yellow with the apical third brown, VI–VIII pale brown, VIII with apex slightly paler( Fig. 26View FIGURES 22–30); pronotum with dark brown lateral stripes, median triangular pale area not reaching anterior margin( Fig. 22View FIGURES 22–30); fore wing including clavus brown with a small spot near the base( Fig. 25View FIGURES 22–30); all legs yellowish white; abdominal tergite II with a small pale brown patch in middle, III–VI yellowish white each with an inverted trapezoidal-shaped area in the middle, VII–IX dark brown, X yellowish brown with apex pale( Figs 4View FIGURES 1–12, 25View FIGURES 22–30); body setae brown.

Head ( Fig. 22View FIGURES 22–30) longer than wide, with a fairly long neck-like constriction and transverse striae behind compound eyes; ocellar setae III situated at tangent of posterior margin of hind ocelli; six pairs of postocular setae present, V far from compound eyes. Antennal segments III–VI with microtrichia ( Fig. 26View FIGURES 22–30), VIII longer than VII. Pronotum ( Fig. 22View FIGURES 22–30) wider than long, smooth with about 16–18 discal setae, inner posteroangular setae longer than outer, two pairs of posteromarginal setae present. Mesonotum ( Fig. 24View FIGURES 22–30) anterior smooth with some transverse striate sculpture near posterior margin, CPS absent anteromedially; median pair of setae situated in front of submedian pairs. Metascutum ( Fig. 24View FIGURES 22–30) smooth medially but sculptured longitudinally at each side, CPS absent; median pair of setae close to anterior margin. Prosternal ferna undivided. Metaepimeron without setae. Mesosternum with sternopleural sutures; only mesothoracic endofurca present. Fore wing first vein usually with 7 basal and 2 discal setae, second vein with 17 setae; clavus usually with 3–5 veinal and 1 discal setae.

Abdominal tergites with transverse striae laterally and a few striae at anterior margin; tergites II–VII ( Fig. 23View FIGURES 22–30) with three setae (S3 to S5 setae) arranged in a straight line along lateral margin; S4 minute on tergites V–VIII; tergite IX without CPS; sternites without discal setae, II–VII each with 3 pairs of posteromarginal setae, VII with all three pairs of setae inserted ahead of posterior margin.

Measurements (holotype female in microns). Distended body length 1836. Head length 149, width across cheeks 124; width across eyes 162; ocellar setae III length 38. Pronotum median length 130, width 210; posteroangular setae length, inner 96, outer 61; posteromarginal setae I length 25. Metascutum median setae length 34. Fore wings 1132. Antennal segments I to VIII length as follows: 20, 43, 57, 75, 70, 88, 20, 27.

Male. Unknown.

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

Paratypes: 6 females, same data as holotype  .

Etymology. The species is named for the collection place.

Comments. This new species runs to bellus in the key provided by Bhatti (2000), but is distinguished from bellus by the presence of the mesothoracic endofurca, S4 minute on tergites V–VIII and abdominal tergites VII–IX dark brown. It is closely related to dorsalis ( Masumoto & Okajima 2011), but can be distinguished by head with a long neck-like constriction, abdominal tergites III–VI each with an inverted trapezoidal brown patch in the middle and tergites VII–IX dark brown (in dorsalis head slightly concave behind compound eyes, abdominal tergites I–VII yellowish white with III–VII each with a transverse diamond-shaped dark area in middle, VIII–IX dark brown). According to Masumoto and Okajima (2011) this species may belong to bellus -section together with alis, arorai, dorsalis, elegans  and taiwanus.