Streothrips jianshuiensis, Liu & Mound & Zhang, 2020

Liu, Hui, Mound, Laurence & Zhang, Hongrui, 2020, Streothrips jianshuiensis sp. n., a tropical addition to the Aeolothripidae fauna of China (Thysanoptera), Zootaxa 4819 (1), pp. 1-5 : 2-5

Streothrips jianshuiensis sp.n.

Female macroptera. Body dark brown ( Fig. 1 ); legs wholly dark brown except fore and middle tarsi paler; antennal segments I–II dark brown, III pale except apex brown, distal half of IV, also V–IX dark brown ( Fig. 12 ); fore wing pale at base, a transverse dark brown band close to base, with two longitudinal dark brown bands around wing margins, wider along posterior margin than anterior margin ( Fig. 14 ); clavus brown on anterior half. Head wider than long, with transverse striae behind ocellar area, especially close medially; about 4 pairs of interocellar setae, one pair stout; about 30 setae on postocellar area ( Fig. 4 ); frontoclypeus with at most 12 pairs of setae, including 2 long pairs and with 1 stout pair beside eyes. Maxillary palps 3-segmented, segment II not subdivided. Antennae 9-segmented, antennal segments III–IV with linear sensorium, without internal markings, on III about 0.3–0.5 times as long as segment, on IV about 0.6 times as long as segment and curved distally, broadened at apex ( Fig. 12 ).

Anterior half of pronotum with transverse striae weak but posterior half clearly and closely striate, with about 80 discal setae and 3–4 pairs of posteromarginal setae ( Fig. 5 ). Mesonotum closely striate ( Fig. 8 ), campaniform sensilla (=CPS) absent. Metascutum with arcuate, close striae but transverse at anterior ( Fig. 8 ), with pair of CPS medially, pair of small setae close to posterior. Abdominal tergite I broad, with transverse striae on anterior and sides, abdominal tergites II–VIII with transverse striae laterally; tergite I without CPS, II with pair of CPS behind median setae, III–VIII each with pair of CPS in front of median setae, IX with pair of CPS near posterior margin, X with pair of CPS far from posterior margin ( Fig. 6 ). Sternites II–VII without discal setae, sternite II with 2 pairs of posteromarginal setae, III–IV with 3 pairs ( Fig. 2 ), V–VII with 4 pairs ( Fig. 3 ), VII with 2 pairs of accessory setae between S1 and S2.

Measurements (holotype in microns). Body length 1900. Head length 180; width 216. Pronotum 173; width 276. Fore wing length 878; median width 120. Antennal segments I–IX length (median width): 32(37); 57(27); 108(23); 106(22); 58(24); 13(18); 9(12); 11(7); 11(5).

Male: unknown.

Specimens studied. Holotype female, CHINA, Yunnan Province,Jianshui County, Swallow Cave(23°63’84”N, 103°05’78”E), on flowers of Buddleja officinalis [ Loganiaceae ], 2.iv.2019 (Xie Yanlan), in collection of Yunnan Agricultural University, Kunming.

Paratypes: 1 female, same data as holotype; 1 female, same locality, on flowers of Carissa spinarum [ Apocynaceae ], 26.iv.2019 (Liu Hui).

Etymology. This species named after the collecting place.

Comments: This new species is distinguished from the other three species of Streothrips by the fore wings having longitudinal dark brown bands along the anterior and posterior margins, and antennal segments I–II as brown as the head. The three previously described species, alaris, arorai and moundi all have different markings on the fore wings, and the basal antennal segments pale ( Ng & Eow 2012). The diversity of colour patterns on the fore wing among the members of this genus is interesting. Similar variation, including colouring of the wing margins, occurs amongst species of Franklinothrips ( Mound & Reynaud 2005) , whereas most of the 112 species of Aeolothrips have only transverse banding patterns ( Alavi & Minaei 2018).

Figures

FIGURES 1–6. Streothrips jianshuiensis sp.n. (1) Female; (2) Sternites III–IV; (3) Sternites V–VI; (4) Head; (5) Pronotum; (6) Tergites IX–X.

FIGURES 7–14. (7) Mymarothrips garuda. Head and pronotum; Meso and metanotum 8–9: (8) Streothrips jianshuiensis sp.n.; (9) Aeolothrips sp.; (10) Fore wing of Mymarothrips garuda. Antenna 11–13: (11) Mymarothrips sp.; (12) Streothrips jianshuiensis sp.n.; (13) Franklinothrips tani; (14) Fore wing of Streothrips jianshuiensis sp.n.