Bamboosiella caudibruna

Zhao, Chao, Wang, Zhaohong & Tong, Xiaoli, 2018, Three new species and three new records of the genus Bamboosiella from China (Thysanoptera: Phlaeothripidae), Zootaxa 4514 (2), pp. 167-180: 169-171

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Bamboosiella caudibruna

sp. n.

Bamboosiella caudibruna  sp. n.

( Figs 3–8View FIGURES 3–8, 31, 32View FIGURES 31–36)

Female macroptera ( Fig. 31View FIGURES 31–36). Body bicolored; head, thorax and abdominal tube brown with extreme base paler; antennal segments ( Fig. 8View FIGURES 3–8) I–III yellow with I–II faintly shaded, IV–VIII brown except IV with basal 1/3 and V with basal 1/4 yellow; all legs yellow except for fore femora tinged with light brown on basal half; abdominal segments I–IX yellow; wings transparent.

Head ( Fig. 3View FIGURES 3–8) approximately 0.8 times as long as broad, dorsal surface smooth but sculptured posteriorly; ocelli and eyes developed, postocellar setae minute and pointed apically, slightly longer than diameter of hind ocellus; cheeks weakly constricted towards base; postocular setae shorter than eyes, expanded at apex. Antennae 8- segmented ( Fig. 8View FIGURES 3–8), approximately 2.5 times as long as head; segments III and IV with 1+1 and 1+2 sense cones respectively, segment VIII without pedicel broadly joined to VII.

Pronotum surface smooth, pronotal am setae reduced to minute, other 4 major setae well developed with expanded apically ( Fig. 4View FIGURES 3–8), notopleural sutures complete. Basantra absent; mesopresternum complete and boatshaped, narrowed at middle. Metanotum weakly sculptured with polygonal reticulation ( Fig. 6View FIGURES 3–8). Fore tarsal tooth absent; fore wing slightly constricted at middle, with 4–5 duplicated cilia, subbasal wing setae well developed, S1 as long as S2, expanded apically, S3 the longest with blunt apex, approximately 2.0 times as long as S1.

Pelta ( Fig. 7View FIGURES 3–8) hat-shaped and eroded laterally, with slender lateral lobes and a pair of campaniform sensilla; abdominal tergites II–VII each with two pairs of wing retaining setae; tergite IX setae S1 expanded at apex and shorter than S2, S2 subequal to S 3 in length and both blunt apically; tube shorter than head and slightly longer than S2 and S3; anal setae slightly shorter than tube.

Measurements (holotype female in microns). Distended body length 1420. Head length 150, width 165; eyes length 65; postocular setae length 40; diameter of hind ocellus 15; postocellar setae length 10. Antennae length 300, segments I–VIII length (width) as follows: 23(30); 40(25); 44(25); 46(25); 44(23); 44(23); 35(20); 24(11). Pronotum median length 220, width across median part 110; length of major setae: am 10, aa 24, ml 32, pa 32, epim 41. Fore wing length 570, sub-basal setae S1–S3 length: 24, 25, 45. Metanotum median setae 20. Abdominal tergite IX S1 setae length 80, S2 and S3 setae length 95. Tube length 106, width at base 54, at apex 27; anal setae length 100.

Male macroptera ( Fig. 32View FIGURES 31–36). Similar in colour and structure to female, but body smaller, all legs yellow, fore tarsus with a tooth ( Fig. 5View FIGURES 3–8), tergite IX setae S2 short and stout, approximately 1/2 of S1, setae S3 longest, slightly longer than tube.

Measurements (paratype male in microns). Distended body length 1280. Head length 145, width 155; eyes length 65; postocular setae length 40; diameter of hind ocellus 15; postocellar setae length 7. Antennae length 280, segments I–VIII length (width) as follows: 20(30); 33(25); 41(23); 43(24); 40(21); 40(20); 31(17); 24(10). Pronotum median length 200, width across median part 120; length of major setae: am 5, aa 20, ml 25, pa 25, epim 30. Fore wing length 520, sub-basal setae S1–S3 length: 20, 20, 38. Metanotum median setae 10. Abdominal tergite IX S1 setae length 65, S2 setae 30, S3 setae 110. Tube length 95, width at base 46, at apex 25; anal setae length 115.

Material examined. Holotype female, Guangdong: Guangning County, Bamboo Park (23°34'N, 112°24'E), in leaf litter of bamboo, 21.xi.2010 (Tao Song).GoogleMaps 

Paratypes. 1 female and 3 males, collected with holotype. Guangdong: Guangzhou City, Longdong Forest Park (23°14'N, 113°24'E)GoogleMaps  , 1 female, in bamboo leaf-litter, 17.iv.2015 (Zhaohong Wang). Jiangxi: Chongyi County, Yangling National Forest Park (25°37'50''N, 114°18'16''E, alt. 940m)GoogleMaps  , 2 females, on living leaves of bamboo, 22.viii.2015 (Chao Zhao).

Etymology. The specific epithet, caudibruna  , is derived from two Latin words, caud- meaning tail and brunus meaning brown, in reference to the new species with brown tube.

Distribution. China (Jiangxi, Guangdong).

Remarks. This new species is most closely related to B. graminella  by sharing the following characters: short head, colour pattern, reduced pronotal am and tergite IX S1 setae expanded apically ( Pitkin 1976), but it can be readily distinguished from the latter by the following combination of characters: (1) in the species, antennal segment I light yellowish brown, segment II yellow, segments V–VIII uniformly brown, while in graminella  , antennal segments I–II pale brown, V–VI yellow tinged with pale brown in apical 1/2 to 2/3; (2) abdominal segments VIII–IX yellow, while those in graminella  are brown; (3) fore tarsal tooth present in male, but it is absent in both sexes of graminella  .