Hoplandrothrips floresi sp. n., 2024

Okajima, Shûji & Masumoto, Masami, 2024, The genus Hoplandrothrips and its relatives (Thysanoptera: Phlaeothripidae) from Southeast Asia and Taiwan, Zootaxa 5489 (1), pp. 22-91 : 44-45

Hoplandrothrips floresi sp. n.

( Figs 29–30 , 177–186 )

Female (macroptera). Distended body length: about 2.5mm. Body uniformly brown. Antennal segments brown, basal 1/4 of segment III yellowish. Legs largely brown; apices of tibiae scarcely paler, tarsi yellow. Fore wing scarcely shaded with brown medially. All prominent setae clear. Head ( Figs 177 & 178 ) almost as long as wide, dorsal surface almost smooth, very weakly sculptured laterally and posteriorly, with polygonal reticulation, ocellar region almost smooth. Cheeks swollen, distinctly constricted at anterior ends, serrated, each with a few setae. Postocular setae well-developed, almost as long as dorsal length of eyes, expanded. Eyes slightly larger on ventral surface, dorsal length about 1/3 length of head; distance between posterior ocelli longer than diameter of an ocellus, posterior ocelli 25μm apart from one another. Antennae ( Figs 179 & 180 ) about 2.1 times as long as head; segment VIII short, not distinctly constricted at base, cone-shaped; segment III short and wide, 1.58 times as long as wide, shorter than segment IV, with three wide-based stout sense cones which are longer than 1/2 length of the segment. Maxillary stylets retracted to eyes. Pronotum smooth, but weakly reticulate posteriorly, about 0.6 times as long as head; five pairs of prominent setae elongate, expanded; am well-developed, but shorter than aa, pa the longest. Mesopresternum ( Fig. 184 ) divided into two lateral large triangles and a small median area. Metanotum ( Fig. 181 ) sculptured with polygonal reticulation in posterior 1/2, almost smooth or very weakly reticulate in anterior 1/2, median pair of setae acute, 38–40μm apart from anterior margin, 80μm apart from one another. Fore tarsal tooth ( Fig. 182 ) short, but distinct. Fore wings each with 8–12 duplicated cilia; three sub-basal setae ( Fig. 185 ) expanded, S2 the longest. Pelta ( Fig. 181 ) bell-shaped, distinctly reticulate. Tergite IX posteromarginal setae weakly expanded, S1 and S2 subequal in length, 0.77–0.80 times as long as tube, intermediate setae slender, about 2/3 length of S1. Tube ( Fig. 186 ) 0.58 times as long as head, 1.82 times as long as wide. Terminal setae much longer than tube.

Measurements (holotype female in μm). Body length about 2480 (distended). Head length 228, from anterior margin of eyes 215, width across eyes 195, maximum width across cheeks 218; eyes dorsal length 75, ventral length 88, width 60; diameter of posterior ocelli 18–20; postocular setae 70–75. Antenna total length 475, segments I–VIII length (width) as follows: 45 (42), 50 (33), 68 (43), 75 (43), 62 (34), 54 (26), 48 (24), 35 (12). Pronotum length 137, width 278. Setae on prothorax: am?50, aa 55–60, ml?60, pa 85, epim 65. Fore wing length 1030. Sub-basal wing setae: S1 68–74, S2 80–90, S3 70–74. Tergite IX setae: S1 103–105, S2 102–106. Tube length 133, maximum width 73; terminal setae 212–215.

Male (macroptera). Distended body length: about 2.2mm. Colour similar to female, but tibiae yellow, scarcely shaded with brown. Cheeks each with a stout sub-basal seta. Pronotal am short and expanded, much shorter than aa. Fore coxa with pointed two stout setae on posterior margin; fore femur ( Fig. 183 ) with a ventral apical tubercle, fore tibia with a small sub-basal tubercle. Fore wing with 11–12 duplicated cilia. Abdominal sternite VIII with a median weak pore plate; tergite IX S2 setae shorter than 1/2 length of S1, intermediate setae longer than S2. Tube 0.51 times as long as head.

Measurements (paratype male in μm). Body length about 2150 (distended). Head length 213, from anterior margin of eyes 195, width across eyes 187, maximum width across cheeks 197; eyes dorsal length 73, ventral length 83, width 52; diameter of posterior ocelli 18–20; postocular setae 72–80. Antenna total length 440, segments I–VIII length (width) as follows: 42 (38), 45 (30), 63 (39), 70 (38), 61 (30), 50 (25), 45 (23), 33 (13). Pronotum length 130, width 268. Setae on prothorax: am 20–30, aa 75, ml about 50, pa 70–80, epim about 50. Fore wing length 960. Sub-basal wing setae: S1 65–70, S2 75–82, S3 70–75. Tergite IX setae: S1 86–90, S2 38 –42. Tube length 108, maximum width 65; terminal setae 215.

Type series. Holotype: macropterous female, Indonesia, Flores Is., Manggarai , Gololoni, 1225m alt., on dead branches, 25.viii.2006, SO . Paratype: Indonesia, 1 male, collected together with holotype .

Remarks. H. floresi is somewhat similar to H. obesametae in having the head shorter, almost as long as wide, antennal segment VIII short, and not pedicellate, and the sternal pore plate present in male. However, from the latter species, it can be distinguished by the head and pronotum not reticulate, almost smooth, and the eyes slightly larger on ventral surface. H. sulawesi sp. n. is also similar to this species, but it has antennal segment III longer than segment IV, the cheeks distinctly tuberculate, and no sternal pore plate in male.

Figures

FIGURES 29–42. Hoplandrothrips species. E. floresi sp. n. 29–30: (29) female; (30) male. E. formosae sp. n. 31–33: (31) female; (32) small male; (33) large male. E. graminicola sp. n. 34–35: (34) female; (35) male. H. laurencei sp. n. 36–37: (36) female; (37) male. H. obesametae 38–39: (38) female; (39) male. H. quinqueconus sp. n. 40–42: (40) female; (41) large male; (42) small male.

FIGURES 177–186. Hoplandrothrips floresi sp. n. (177) Head and prothorax, female; (178) head and prothorax, male; (179) antennal segments III–IV, female; (180) antennal segments V–VIII, female; (181) metanotum and pelta, female; (182) fore leg, female; (183) fore leg, male; (184) prosternum and mesopresternum, female; (185) sub-basal wing setae, female; (186) tube, female.