Liothrips longistylus, Dang & An & Mound & Qiao, 2024

Dang, Lihong, An, Yiyan, Mound, Laurence A. & Qiao, Gexia, 2024, Leaf-feeding species of the genus Liothrips from China (Thysanoptera, Phlaeothripinae), Zootaxa 5419 (1), pp. 53-84 : 68

Liothrips longistylus sp. n.

( Figs 11 , 38 , 57 )

Female macroptera. Body brown; fore femora largely yellow, with light brown in basal third and on outer margin, mid and hind femora light brown, with apical third pale, fore tibiae clear yellow, mid and hind tibiae light brown with apices and base pale, all tarsi yellow; antennal segments I–II light brown, paler than head, III clear yellow, IV largely yellow with slightly shaded at apex, V–VI light brown, with base pale, VII–VIII lightly brown ( Fig. 38 ); major setae dark; fore wings hyaline.

Head wider than long ( Fig. 11 ); postocular setae much longer than eyes, softly pointed ( Fig. 11 ); eyes dorsally and ventrally equal in length; maxillary stylets about 0.13 of head width apart, retracted to compound eyes; mouth cone bluntly pointed, reaching to level of posterior margin of ferna. Antennal segment III about twice as long as apical width ( Fig. 38 ); IV with 3 major sense cones; VIII constricted at base. Pronotum transverse, with 5 pairs of long slightly blunt setae, am shorter than aa; surface almost smooth, with weak sculpture near margins. All legs normal, fore femora slightly enlarged. Fore wing with 3 blunt sub-basal setae arising in straight line, S1 shorter than S2 and S3, with about 20 duplicated cilia. Mesonotum transversely reticulate, lateral setae well-developed, pointed at apex. Metanotum sculptured longitudinal reticulate, major setae slender and acute. Mesopresternum eroded medially, but weakly connected ( Fig. 57 ), metathoracic sternopleural sutures short. Pelta broadly triangular, weakly reticulate, without pair of CPS (but present in one paratype female); tergite II with 2 pairs of lateral setae; tergite VIII posterolateral setae well-developed, but much shorter than posteroangulars; tergite IX setae S1–S3 shorter than tube, softly acute at apex; tube slightly longer than head, anal setae shorter than tube.

Measurements (holotype female in microns). Body length 2550. Head length (maximum width) 195 (235); postocular setae length 100; eye dorsal length 70; antennal segments I–VIII length (width): 45 (40), 50 (35), 75 (35), 70 (40), 65 (40), 65 (35), 60 (30), 40 (15); sense cone on III length 30. Pronotum length (width) 165 (365); am 45, aa 70, ml 75, epim 130, pa 125. Fore wing sub-basal setae S1 50, S2 80, S3 95. Tergite VIII posterolateral setae 80; tergite IX setae S1 170, S2 170, S3 210; tube length 225, basal width 100, apical width 50; anal setae length 185.

Male. Unknown.

Specimens studied. Holotype female, CHINA, Guangxi, Damingshan National Nature Reserve, taken on the leaves of Adinandra millettii , 21.v.2011, Lihong Dang ( NZMC).

Paratypes: 1 female with same data as holotype ( SNUT); same location , 1 female, 29.v.2011, Lihong Dang ( NZMC) .

Etymology. The species epithet refers to the elongate maxillary stylets.

Comments. This new species is similar to L. fungi in the short, slightly broader head ( Okajima 2006), but it differs with the postocular setae longer than eyes, slightly blunt at apex ( Fig. 11 ); antennal segments short, IV–VII almost spherical with base constricted, III about 1.8 times as long as wide; mouth-cone longer than head capsule and reaching posterior of ferna; tergum IX S1 and S2 subequal in length, a bit shorter than tube; head as long as tube. In L. fungi the postocular setae are much shorter than eyes, expanded at apex; antennal segments normal, III about 2.5 times as long as wide; mouth-cone much longer than head capsule, the tip reaching mesopresternum; tergum IX S1 and S2 subequal in length, much shorter than tube; head a little longer than tube.

Figures

FIGURES 9–14. Heads and pronotum. Liothrips species (9–13): (9) brevis sp. n.; (10) mirabilis; (11) longistylus sp. n.; (12) populi sp. n.; (13) piceae sp. n. (14) Teuchothrips turkestanicus.

FIGURES 22–41. Antennae of Liothrips species. (22) adusticornis; (23) brevis sp. n.; (24) fagraeae; (25) hagai; (26) minys; (27) pallipes; (28) piperinus; (29) populi sp. n.; (30) setinodis; (31) elongatus sp. n.; (32) mohanrami; (33) rohdeae; (34) wasabiae; (35) piceae sp. n.; (36) heptapleuricola; (37) miyazakii; (38) longistylus sp. n.; (39) tibetanus sp. n.; (40) vaneeckei; (41) mirabilis.

FIGURES 53–60. Liothrips species. Mesopresternum (53–58): (53) aporosae; (54) elongatus sp. n.; (55) mohanrami; (56) brevis sp. n.; (57) longistylus sp. n.; (58) setinodis. Hind tibiae and tarsi (59–60): (59) elongatus sp. n.; (60) piceae sp. n.