Aduncothrips albus, Li & Elie & Liu & Zhang, 2022

Li, Yajin, Elie, Ntirenganya, Liu, Hui & Zhang, Hongrui, 2022, Aduncothrips newly recorded from China, with three new species and a new generic synonym (Thysanoptera: Aeolothripidae), Zootaxa 5141 (1), pp. 49-59 : 51-53

Aduncothrips albus sp.n.

( Figs 1–9 )

Female macroptera. Body uniformly brown ( Fig. 1 ); antennal segments I–II brown, III yellow, IV pale at distal half and brown on remaining part, V–IX brown ( Fig. 4 ). Fore wing with a brownish base and long transverse dark band in the middle, base and apex pale, clavus brown; all legs dark brown with tibiae and tarsi pale. Head longer than wider, arched at cheeks, with close transverse striae; postocular setae in 2 rows but irregularly arranged medially and laterally ( Fig. 5 ); mouth cone pointed and extending between fore coxae, maxillary palp segment II subdivided. Antennal segments III–IV with sensorium vermicular and curving around apex, with internal markings, sensoria 0.7 and 0.8 times as long as length of segments ( Fig. 9 ). Pronotum as long as wide, densely sculptured with transverse striae, with about 50 discal setae and 3 pairs of posteromarginal setae, S1 stouter. Mesonotum tightly sculptured with densely transverse striae, internal markings near posterior area; lateral and posteromedian setae short and stout; anteromedian CPS absent ( Fig. 4 ). Metascutum anteromedian area with transverse dense sculpture lines and posteromedian short reticulations, with small wrinkles between sculpture lines, median pair of setae near posterior margin; CPS absent ( Fig. 4 ). Abdominal tergite I with 2 transverse lines on anterior part, II-VIII smooth medially ( Fig. 7 ). Sternites II–VII each with 3, 4, 4, 4, 5(rarely 4), 5 pairs of posteromarginal setae, submarginal on VII, 2 pairs of accessory setae between S1 and S2; sternites III–VII with 1–5 pairs of discal setae ( Fig. 6 ), VIII with 1 discal seta.

Measurements (holotype in microns). Body length 1882; head length 194, width 180. (Pronotum length 185, width 188). Fore wing length 707, median width 109. Antennal segments I–IX length: 36, 44, 116, 106, 59, 49, 39, 14, 16.

Male macroptera. Similar to but smaller and paler than female( Fig. 2 ); antennal segment II pale at apex, segment III pale at base; fore wings weakly narrowed and long ( Fig. 8 ). Maxillary palps 3-segmented, segment II undivided. Abdominal tergite I with two longitudinal ridges, IX without curved claspers, S1 setae slightly longer than S2 ( Fig. 3 ). Sternites II–VII with 3 pairs of posteromarginal setae, VIII with 4 pairs posteromarginal setae, V–VIII each with 1 pair of discal setae.

Measurements (paratype in microns). Body length 1324; head length 178, width 162. (Pronotum length 155, width 185). Fore wing length 670, median width 75. Antennal segments I–IX length: 29, 45, 107, 89, 55, 44, 38, 16, 10.

Specimens studied. Holotype: female, CHINA, YUNNAN Province, Heqing County (26°56'62"N, 100°18'25"E), on grass, 27.vii.2014 (Zhang Hongrui). Paratypes: 2 females & 1 male, collected with holotype. YUNNAN Province; Xishuangbanna Gasa International Airport (26°56'62"N, 100°22'25"E), 1 female, on litchi, 23.ii.2009 (Sun Shiqing); Xishuangbanna Prefecture , 1 female, on mango, v.2009 (Sun Shiqing); Hekou County , 1 female, on Lactuca sativa [ Asteraceae ], 30.iv.2010 (Sun Shiqing & Liu Shengwu); Xishuangbanna Tropical Botanic Garden , 1 female on grass, 11.iii.2017 (Hongrui Zhang).

Etymology. This species is named after the pale tibiae and tarsi.

Comments. This new species is distinguished from japonicus in the key above. In addition, A. albus has all the tibiae and tarsi sharply paler than the brown femora, and the very long extension of the filamentous sensorium on segment III does not extend to the base. The species A. asiaticus also has the tibiae and tarsi yellow, but has fore wings with a longitudinal dark band along the posterior margin.

Figures

FIGURES 1–9. Aduncothrips albus sp.n. (1) Body of female; (2) Body of male; (3) Tergites VII-X of male; (4) Meso and metanotum; (5) Head and pronotum; (6) Sternites III-VII of female; (7) Tergites VIII-X of female; (8) Forewing of male; (9) Antenna.