Anaphothrips dentatus, Cui, Yanze, Xi, Jinghui & Wang, Jun, 2017

Cui, Yanze, Xi, Jinghui & Wang, Jun, 2017, The genus Anaphothrips with one new species from China (Thysanoptera, Thripidae), ZooKeys 668, pp. 49-59 : 49-50

Anaphothrips dentatus sp. n. Figs 2-8, 9-14

Specimens examined.

Holotype: Female (apterous), China, Heilongjiang Province, Sanjiang Plain (47°35.08'N, 133°31.42'E), 18.vii.2013, from grasses (Jun Wang). Paratypes: 1 male and 1 female same data as holotype; 3 females, same locality and habitat as holotype, 2.vii.2014, from grasses (Jun Wang).

Diagnosis.

Both sexes apterous. Body brown, but head and thorax paler, legs yellow, antennal segments I, III–V yellow, segments II, VI–IX brown. Head wider than long slightly, projecting in front of eyes; ocelli reduced. Antennae 9-segmented, segments III–IV with sense cone forked. Pronotum almost smooth; metanotum median setae far apart and arising on posterior third of sclerite. Abdominal tergite VIII posterior margin with craspedum formed of small teeth. Male tergite IX with two pairs of stout median thorn-like setae near posterior margin; sternites III–VII with C-shaped pore plate slightly wider than distance between posteromarginal seta S1.

Description.

Apterous female (Fig. 2). Body uniformly brown, head and thorax paler; legs yellow; antennal segments I, III–V yellow, segments II, VI–IX brown.

Head (Fig. 4) 0.9 times as long as wide, projecting in front of eyes, dorsal surface sculptured with irregular transverse reticulations, but almost smooth between eyes; ocelli reduced, three pairs of ocellar setae present, seta III longer; three pairs of postocular setae present; antennae 9-segmented (Fig. 6), segment III with pedicel, segments III–IV with small forked sense cone and rows of microtrichia, a complete transverse suture present between segments VI and VII.

Pronotum almost smooth (Fig. 5), without long setae; prosternal ferna undivided (Fig. 9). Mesonotum sculptured with transverse reticulations (Fig. 7), a pair of campaniform sensilla close to anterior margin, a pair of median setae and a pair of anterior external setae present, a pair of setae arising close to posterior margin. Metanotum sculptured with polygonal reticulations (Fig. 7), paired anteromarginal setae and paired campaniform sensilla present, paired median setae far apart and arising on posterior third of sclerite. Mesofurcal spinula present, metafurca without spinula (Fig. 8).

Abdominal tergites II–VIII with sculpture laterally (Fig. 10), one pair of median setae, two pairs of campaniform sensilla, two pairs of lateral setae and a pair of lateral marginal setae present, a pair of posteroangular setae arising at posterior margin far from the posterior angles; tergite VIII with spiracles occupying less than half of lateral margins, posterior margin with craspedum formed of small teeth; tergite IX with a pair of mid–dorsal setae and two pairs of campaniform sensilla, SI and S2 close to posterior margin longer than tergite X; tergite X divided longitudinally with a pair of campaniform sensilla and two pairs of long setae close to posterior margin (Fig. 13). Sternites II–VII reticulated laterally and without discal setae, sternite II with two pairs of posteromarginal setae, III–VII with three pairs (Fig. 11); sternite VIII with three pairs of setae laterally. Pleurotergites III–VII with posteromarginal setae, posterior margin with lobes (Fig. 11).

Measurements (holotype). Body length 1258. Head length 125, width 146; antennae length 238; antennal segments I–IX length(width): 20(28), 32(25), 37(17), 30(17), 31(18), 36(19), 8(11), 8(7), 12(4); antennal terminal setae 17; eyes length 66; diameter of ocelli 6, distance of posterior ocelli 37; ocellar setae I–III: 7, 7, 13; postocular setae I–III: 9, 13, 6. Pronotum median length 130, width 171; setae length 5-14. Mesonotum anterior median setae 8. Metanotum anteromarginal setae 12, median setae 14. Abdominal pelta median setae 11; tergite IX S1 65, S2 80; tergite X median setae 62; sternites II–VII posteromarginal setae 6-33.

Apterous male (Fig. 3). Similar to female but smaller and paler; tergite IX with two pairs of stout median thorn-like setae near posterior margin, setae I 1.7 times as long as II (Fig. 14); sternites III–VII with C-shaped pore plate slightly wider than distance between posteromarginal setae S1 (Fig. 12).

Measurements (paratype male). Body length 1003. Head length 120, width 141; antennae length 202; antennal segments I–IX length(width): 17(25), 27(22), 34(15), 26(15), 27(15), 30(15), 7(10), 6(7), 11(4); antennal terminal setae 14; eyes length 59; diameter of ocelli 5, distance of posterior ocelli 36; ocelli setae I–III: 9, 7, 11; postocular setae I–III: 7, 9, 8. Pronotum median length 106; width 152; setae length 3-11. Mesonotum anterior median setae 8. Metanotum anteromarginal setae 9, median setae 12. Abdominal tergite I median setae 12; tergite IX stout median thorn–like setae I 19, II 11, setae S1 53, S2 56; tergite X median setae 63; sternites II–VII posteromarginal setae 7-28; sternites III–VII pore plate thickness (T) 5-9, width (W) 48, 45, 47, 48, 36.

Distribution.

China (Heilongjiang Province).

Etymology.

The Latin word dentatus derived from tooth-shaped craspedum on abdominal tergite VIII posterior margin.

Remarks.

The new species belongs to a small group of Anaphothrips in which abdominal tergite VIII posterior margin has a craspedum that is tooth-shaped not ciliate. It is similar in appearance to the description by Pitkin (1978) of the Australian species A. moundi , but can be distinguished from the latter by the following features: antennal segment II brown, sensorium on III forked; abdominal tergite VIII with craspedum of teeth longer; male abdominal sternites pore plate only slightly wider than the distance of posteromarginal setae S1. The morphological characteristics of A. moundi are provided by Mound and Masumoto (2009). The new species is also similar to A. obscurus in appearance, but can be distinguished by the following characters: both sexes apterous; ocelli reduced; head wider than long; abdominal tergite VIII with tooth-shaped craspedum; male sternites III–VII with C-shaped pore plates only slightly wider than the distance of posteromarginal setae S1.