Phylladothrips Priesner, 1933

Dang, Lihong, An, Yiyan, Okajima, Shuji & Mound, Laurence A., 2023, Taxonomic review of the Oriental genus Phylladothrips Priesner (Thysanoptera, Phlaeothripidae), ZooKeys 1185, pp. 241-253 : 241

Phylladothrips Priesner

Phylladothrips Priesner, 1933: 79. Type species Phylladothrips karnyi Priesner, 1933, by monotypy.

Paradexiothrips Okajima, 1984: 730. Type species Paradexiothrips bispinosus Okajima, 1984, by monotypy. Synonymised by Okajima 1988: 707.

Note.

Most species of Phylladothrips are found in the tropic and subtropic regions of Asia (Fig. 1 ). However, although described from Taiwan, the distribution of P. pictus extends to the temperate region, where this species was recorded from the Ryukyu Islands, the Izu Islands and Honshu of Japan ( Okajima 2006). Three species of Phylladothrips are found in the subtropics of southern China - Guangxi and southeast of Xizang, where the fauna shares many thrips taxa with Southeast Asian countries and Japan ( Dang et al. 2014). The area between mainland China and Australia is species-rich for thrips, not only both fungal feeding and plant feeding species. At present it is impossible to detect any distribution patterns due to limited exploration.

Diagnosis.

Small-sized fungus-feeders. Head a little wider than long, usually distinctly constricted at base (Figs 2 - 9 ); eyes large, longer than half length of head; postocellar setae usually slender, sometimes long and expanded at apex (Fig. 2 ); postocular setae well developed, expanded at apex; mouth-cone short and rounded, maxillary stylets broad, retracted far into head capsule, maxillary bridge weakly present or absent; antennae 8-segmented, II with campaniform sensorium on apical half of segment, III and IV with 1+2 and 2+2 sense cones respectively (Fig. 3 ). Pronotal am setae reduced, sometimes aa weak as well; major setae expanded at apex (Figs 2 - 9 , 14 ); notopleural sutures incomplete; basantra scarcely present, or absent (Fig. 15 ); meso- and metanotum with weak setae and sculpture, metanotum median setal pair usually relatively long but pointed at apex; mesopresternum eroded medially (Fig. 15 ); metathoracic sternopleural sutures absent; fore tarsi unarmed; fore wings weakly constricted medially, without duplicated cilia (Fig. 17 ). Pelta hat-shaped (Figs 16 , 18 , 20 ), without campaniform sensilla; tergites II-VIII with two pairs of wing-retaining setae (Figs 20-23 ), sometimes VIII with only one posterior pair developed; accessory setae on tergite IX usually elongate but slender, S2 on male tergite IX well developed, about as long as S1 or a little longer (Fig. 5 ); tube shorter than head, anal setae usually shorter than tube; male sternite without pore plate.

Figures

Figure 1. Distribution sites of Phylladothrips species - indicated by yellow circles.

Figures 2 - 5. Phylladothrips species. P. pallidus (2 - 4) 2 head and pronotum 3 antenna 4 tergites VIII-X, female; P. pictus (5) 5 tergites IX-X, male.

Figures 6 - 15. Phylladothrips species. Head and pronotum (6 - 9) 6 P. niger 7 P. selangor sp. nov. 8 P. pictus 9 P. trisetae sp. nov.; antennae (10 - 13) 10 P. pictus 11 P. trisetae sp. nov. 12 P. fasciae 13 P. selangor sp. nov.; pronotum (14) 14 P. fasciae; basantra and mesopresternum (15) 15 P. selangor sp. nov.

Figures 16 - 23. Phylladothrips species. P. trisetae sp. nov. (16, 17) 16 metanotum, pelta and tergite II 17 fore wing; P. fasciae (18 - 20) 18 pelta 19 sternites V-VI 20 pelta and tergites II-IV; tergites VII-X (21 - 23) 21 P. trisetae sp. nov. 22 P. fasciae 23 P. selangor sp. nov.