Ctenothrips guizhouensis, Xie, Yonghui, Zhang, Hongrui & Li, Zhengyue, 2011

Xie, Yonghui, Zhang, Hongrui & Li, Zhengyue, 2011, A new Ctenothrips from southwestern China (Thysanoptera: Thripidae), Zootaxa 2926, pp. 65-68 : 66

Ctenothrips guizhouensis sp. n.

( Figs. 1–9 )

Female macroptera. Body dark brown; apex of tibiae paler, tarsi yellow ( Fig. 1 ). Antennal segments I & II dark brown, III and basal half of IV & V yellow, the other segments pale brown ( Fig. 2 ). Forewings yellow with base slightly paler ( Fig. 9 ). Antennae 8-segmented, segments III & IV with sensorium forked ( Fig. 2 ). Head longer than wide, with sculpture of distinctly elongate reticulations behind eyes; ocellar setae I absent, setae III well developed in between posterior ocelli; all postocular setae arising in a row except seta II ( Fig. 3 ). Pronotum wider than long, with smooth surface, less than 10 small scattered discal setae, 2 pairs of long posteroangular setae, posterior margin with 2 pairs of short setae ( Fig. 6 ). Mesonotum with polygonally reticulate sculpture, anteromedian campaniform sensilla (CPS) present, but no striations close to these ( Fig. 4 ). Metanotum with polygonally reticulate sculpture but striate laterally; median setae situated well behind anterior margin, arising closer to each other than to lateral pair; one pair of CPS posterior to median setae ( Fig. 4 ). Meso- and metasternum furca without spinula ( Fig. 5 ). Forewing first and second veins each with setal row complete, first vein with 21 setae, second vein with 16 setae, clavus with 5 marginal setae and apical and subapical setae more or less equally long. Abdominal tergite I–VII and anterior margin of VIII polygonally reticulate, CPS close to posterior margin; posteromarginal comb on tergite VIII complete with long, fine microtrichia ( Fig. 7 ); tergite IX with 2 pairs of CPS, but without reticulation, median setae extending beyond apex of X; tergite X tube-like, sculptured with elongate reticulation, median longitudinal split complete ( Fig. 7 ). Pleurotergites of abdominal II–VII with 2 discal setae. Abdominal sternites without discal setae, but with 2–3 pairs of posteromarginal setae arising on margin of each segment.

Measurements (holotype female in microns). Body length 2033. Head, length 198; width across eyes 176. Ocellar setae II length 38; ocellar setae III length 59; postocular setae I length 33. Pronotum, length 171; width 262; posteroangular setae length 61; posteromarginal setae length 25–51. Metanotum median setae length 38. Forewing length 1237. Antennal length 452; segments III–VIII length 89, 81, 60, 103, 13, 15.

Male. Unknown.

Specimens examined. Holotype female, CHINA, Guizhou Province, Zunyi city, Donggong temple, (27° 43' N, 106° 55' E, 865 m H), from Galium flower ( Rubiaceae ), 29. iv. 2009, Zhang Hong-Rui, in Yunnan Agricultural University, Kunming.

Paratypes: 20 females, collected with holotype; 2 paratypes deposited in Australian National Insect Collection, Canberra.

Etymology. Specific epithet is taken from the collecting place.

Comments. This new species exhibits much intraspecific variation on the metanotum, with the position of the median setae and CPS varying. Most of the specimens are similar to the holotype, but some of the specimens have one pair of CPS anterior to the median setae.

This new species can be distinguished readily from the two South Asia species, C. smilax ( Bhatti, 1976) and C. niger ( Kudo, 1977) , since both of these have ocellar setae pair I present on the head. It shares many morphological character states with C. taibaishanensis ( Feng et al., 2003) and C. distinctus ( Franklin, 1907) . However, it differs from C. taibaishanensis in having polygonally reticulate sculpture on the mesonotum, and on abdominal sternite VII the posteromarginal setae are situated in a row along the posterior margin, not anterior to the posterior margin. It can be distinguished easily from C. distinctus by the absence of a spinula on the mesosternal furca. Although similar to C. kwanzanensis , it is distinguished from that species by the presence of three pairs of pronotal postero-marginal setae, and antennal segment III is dark. It is also distinguished easily from C. transeolineae ( Chen, 1979) , since the latter has: (i) almost equal head setae, (ii) ocellar setae III placed just behind hind margin of posterior ocelli, (iii) one pair of posteromarginal setae on pronotum.

Figures

FIGURES 1 – 9. Ctenothrips guizhouensis. Female. (1) Dorsal view of body. (2) Right antenna. (3) Dorsal view of head. (4) Dorsal view of mesonotum and metanotum. (5) Meso- and metasternum furca. (6) Dorsal view of pronotum. (7) Abdominal tergites VIII – X and posteromarginal comb. (8) Abdominal sternite VII and posteromarginal setae. (9) Right forewing.