Bregmatothrips sinensis Wang & Tong, 2016

Wang, Zhaohong, Zhao, Chao, Chen, Junyu & Tong, Xiaoli, 2016, Two newly recorded genera and a new species of Thripinae from China (Thysanoptera: Thripidae), Zoological Systematics 41 (3), pp. 253-260 : 254-256

Bregmatothrips sinensis Wang & Tong , sp. nov. ( Figs 1–7 )

Description. Female macroptera ( Fig. 1 ). Body brown, all femora brown, fore tibiae yellow shaded with light brown in basal third, mid tibiae brown with yellow in distal 1/5, hind tibiae brown with yellowish brown in distal 1/8, and all tarsi yellow; antennal segments III–V clear yellow, I–II and VI–VIII brown; fore wing white with a grey band in 1/3 medially; major setae on body light brown.

Head longer than wide ( Fig. 2 ), about 1.2 times as long as width; head slightly projecting in front of compound eyes, cheeks almost parallel; three pairs of ocellar setae present, pair I separated, pair III situated outside the triangle just posterolateral to fore ocellus; compound eyes not prolonged ventrally, with 5 pigmented ommatidia ventrally and laterally; 4–5 pairs of postocular setae present, but setae I absent, setae II arise far to posterior; vertex distinctly sculptured with many transverse lines medially and posteriorly; mouth cone large and extending between fore coxae, maxillary palps 2-segmented. Antennae 8-segmented; segment I with only one dorso-apical seta ( Fig. 3 ); sensorium on III–IV simple; IV with 5 setae plus one subsidiary sensorium dorsolaterally; segments III–V each with 3–4 rows of sparse microtrichia.

Pronotum ( Fig. 2 ) slightly trapezoidal, notopleural sutures extending along lateral margins; 2 pairs of posteroangular setae present, inner pair (=setae I) longer than outer pair; 3 pairs of posteromarginals, innermost pair longest; dorsal surface almost smooth, but with transverse sculpture lines anteriorly and posteriorly. Mesonotum ( Fig. 5 ) with transverse sculpture, anterior campaniform sensilla absent; one pair of setae anterior to second pair near posterior margin, lateral setal pair minute. Metanotal median area reticulate, without campaniform sensilla, median setae close to anterior margin ( Fig. 5 ). Prosternal ferna complete medially ( Fig. 4 ); mesothoracic sterno-pleural sutures complete; meso and meta furcae without spinula ( Fig. 4 ). Tarsi 2-segmented. Fore wing first vein with about 7 setae in basal half, 2 setae near apex; second vein with 8–9 setae; clavus with 4 veinal and one discal setae.

Abodominal tergite I weakly reticulate, II–VIII with no sculpture medially except near anterior margin and laterally; I– VIII with campaniform sensilla close to posterior margin, II–VIII with pale, translucent craspedum of small lobes; pleurotergites slender; tergite IX with 2 pairs of campaniform sensilla; tergite X longitudinally reticulate with dorsal split complete ( Fig. 6 ). Sternites without discal setae and craspeda, sternites I–VII with 3 pairs of posteromarginal setae, but sternite VII with setae S1 arising in front of posterior margin ( Fig. 7 ).

Measurements (holotype female in microns). Body length 1860. Head, dorsal length 182; ventral length to mouth cone tip 336; width across compound eyes 169; ocellar setae III 63. Pronotum, length 183; maximum width 220; posteroangular inner setae 65; posteroangular outer setae 47. Metanotal median setae 32. Tergite IX setae S1 118; S2 177. Tergite X setae S1 169. Length of antenna 270; length (width) of antennal segments I 22(34), II 39(32), III 45(21), IV 37(21), V 35(21), VI 60(21), VII 13(9) and VIII 18(6). Fore wing length 860.

Male. Unknown.

Material examined. Holotype. ♀, China, Guangdong, Shenzhen, Mt. Wutongshan (22°34'13"N, 114°11'25"E; elev. 600 m), collected from grass, 30 May 2014, leg. Zhaohong Wang. Paratypes. 2♀, same data as the holotype ; 1♀, Guangdong, Gaozhou City, Yuntan Town, Mt. Sanguanshan (21°55'10"N, 111°8'40"E; elev. 600 m), collected from grass, 5 September 2015, leg. Zhaohong Wang ; 1♀, Guangxi, Jiuwanshan National Nature Reserve, Yangmeio (25°11′26″N, 108°38′34″E; elev. 1160 m), collected from grass, 25 July 2015, leg. Zhaohong Wang ; 1♀, Fujian, Wuyishan National Nature Reserve, Aotou (27°40'N, 117°38'E; elev. 970 m), 24 August 1980, leg. Bangkai Huang. All type specimens deposited in SCAU.

Distribution: China (Guangxi, Guangdong, Fujian).

Etymology. The specific epithet, sinensis , is from the Latin word, meaning Chinese.

view of thorax. 5. Meso- and metanotum. 6. Abdominal tergites VII–X. 7. Abdominal sternites VI–VII.

Remarks. This new species is similar to Bregmatothrips australis Mound by sharing antennal segments III–V clear yellow, the sensorium on antennal segments III–IV simple and abdominal sternite VII with setae S1 arising ahead of posterior margin ( Fig. 7 ), but it can be readily distinguished from the latter by the following combination of characteristics: 1) antenna with clearly 8 segments ( Fig. 3 ) (antennae 7-segmented but VII sometimes with partial suture in B. australis ); 2) antennal segment I having only one dorso-apical seta and IV bearing 5 setae ( Fig. 3 ) (two dorso-apical setae and 4 setae in B. australis ); 3) fore wing white with a gray band in mesal third ( Fig. 1 ) (fore wing pale in B. australis ); 4) fore tibiae yellow shaded with light brown in basal third, mid- and hind tibiae largely brown ( Figs 1–2 ) (all tibiae yellow in B. australis ). The new species is also closely related to B. binervis (Kobus) . However, in B. binervis , antennal segment I has two dorso-apical setae, segments III–IV bear a forked sensorium, and the fore wing is uniformly pale brownish yellow or colorless, judging from the available key to world species ( Mound, 2011). B. dimorphus is the only known species of the genus in China ( Han, 1997) prior to this study, it mainly differs from the new species by the antennal segment I has two dorso-apical setae, maxillary palps 3-segmented and abdominal sternite VII with setae S1 arising at posterior margin.

Figures

Figures 1–7. Bregmatothrips sinensis Wang & Tong, sp. nov. 1. Habitus of female. 2. Head and pronotum. 3. Antenna. 4. Ventral