Habrandrothrips sulawesianus, Okajima & Masumoto, 2025

Habrandrothrips sulawesianus sp. nov.

( Figs. 7 View FIGURES 6–17 , 18–24 View FIGURES 18–24 )

Female (microptera). Distended body length: about 1.4mm. Body bicolored brown and yellow ( Fig. 7 View FIGURES 6–17 ). Head and thorax dark brown; abdominal segments largely yellow, segments III – VII with lateral margins brownish, segments VIII and IX brownish yellow; tube pale brown ( Fig. 23 View FIGURES 18–24 ), with basal half yellowish. Fore femora brown, with anterior one-third yellowish ( Fig. 22 View FIGURES 18–24 ), mid femora pale brown, with anterior one-third yellow, hind femora yellow; tibiae and tarsi yellow. Antennal segments I– III yellowish; segments IV – VIII pale brown to dark brown, gradually darkened distally, segments IV and V with bases yellowish. Major body setae yellowish. Head ( Fig. 18 View FIGURES 18–24 ) almost as long as wide, 1.03 times as long as wide; dorsal surface sculptured laterally and posteriorly with transverse striae, ocellar triangle weakly reticulate, almost smooth at middle. Cheeks weakly rounded, gradually constricted to base, weakly serrated. Eyes about 0.3 times as long as head. Ocelli small, almost as large as ommatidium; posterior pair separated from eyes, 32µm apart from each other. Postocular setae much shorter than eyes, expanded; about 100µm apart from each other, about 8µm apart from eyes. Antennae ( Fig. 24 View FIGURES 18–24 ) about 2.0 times as long as head; segment VIII about 0.6 times as long as VII; segment III shorter than segment IV; segment VII a little longer than III; segments III and IV each with two (1+1) stout sense cones. Maxillary bridge narrower than one-third of head width, 0.27 times as wide as head. Pronotum 0.83 times as long as head, about 1.5 times as wide as long; almost smooth; prothoracic am and ml could not be measured in holotype, but possibly about 20µm long, expanded, pa and epim a little longer than am. Prospinasternum reduced, but wide, about 40µm; mesopresternum reduced medially, divided into two lateral small triangles ( Fig. 20 View FIGURES 18–24 ). Mesonotal lateral setae expanded, 17–18µm long. Metanotum ( Fig. 19 View FIGURES 18–24 ) weakly sculptured with polygonal reticulation; median pair of setae finely pointed, less than 15µm, 51µm apart from each other, 25µm apart from anterior margin. Pelta ( Fig. 21 View FIGURES 18–24 ) irregularly triangular, sculptured weakly, about 2.1 times as wide as long. Abdominal tergites III – VII each with a pair of wing-retaining setae. Tergites III – VIII S2 setae: III – VI expanded, VII short and pointed, much shorter than S2 on IX, VIII blunt or very weakly expanded. Tergite IX S1 setae bluntly pointed, shorter than tube, S2 finely pointed, a little longer than tube; intermediate setae longer than half of S1. Tube 0.54 ( Fig. 23 View FIGURES 18–24 ) times as long as head, 2.0 times as long as wide; terminal setae about 1.5 times as long as tube .

Measurements (holotype female in µm). Body length 1380 (distended). Head length 148, from anterior margin of eyes 137, width across eyes 139, maximum width across cheeks 143, minimum width across base 122; eyes length 46; diameter of posterior ocelli 6–9; postocular setae about 25. Maxillary bridge width 38. Antenna total length 295, segments III–VIII length (width) as follows: 34 (25), 40 (26), 38 (25), 37 (23), 38 (20), 23 (14). Pronotum length 123, width 185. Setae on prothorax: am 20, aa?, ml?, pa 23, epim?. Fore wing length 125. Pelta length 43, width 90. Tergite IX setae: S1 60 –62, S2 85–87. Tube length 80, maximum width 40; terminal setae 122.

Male. Unknown.

Type material. Holotype: micropterous female, Indonesia, Sulawesi, nr. Rantepao, Pedamaran , alt. about 1000m, on dead leaves and branches, 8.viii.1984, SO.

Comments. This species is described from central Sulawesi, Indonesia, based on a unique micropterous female collected from dead leafy branches. The existence of these two species with very close relationships but completely different sense cone formulae is of considerable systematic significance.