Hoplandrothrips laurencei 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 : 48-49

Hoplandrothrips laurencei sp. n.

( Figs 36–37 , 205–214 )

Female (macroptera). Distended body length: 1.8–2.1mm. Body largely brown, distal abdominal segments scarcely paler; tube brown, distinctly darker than abdominal segment IX. Antennae brown, segment III yellowish brown, a little paler than the remaining segments. All femora brown, with apices slightly paler; fore tibiae yellowish brown, mid and hind tibiae yellowish, slightly shaded with brown medially; tarsi yellowish. Fore wing shaded with brown, more or less paler sub-basally. All prominent setae yellowish. Head ( Fig. 205 ) longer than wide, 1.27 times as long as wide in holotype, dorsal surface including ocellar region almost smooth. Cheeks very weakly rounded, strongly constricted behind eyes and at base, slightly serrated, with some minute setae. Postocular setae rather close together, 88μm apart from each other in holotype, much shorter than eye, expanded. Eyes about 0.4 times as long as head, 0.38 times in holotype, smaller on ventral surface; posterior ocelli not in contact with eyes, distance between posterior ocelli a little wider than a diameter of the ocellus, 24μm apart from each other in holotype. Antennae ( Fig. 213 ) about 1.7 times as long as head; segment VIII scarcely constricted at base; segment III about 2.0 times as long as wide in holotype, almost as long as segment IV, widest at apical 1/3, then gradually narrowed to apex, with three sense cones. Mouth-cone short; maxillary stylets retracted to eyes. Pronotum almost smooth, about 0.6 times as long head; five pairs of prominent setae expanded, aa a little longer than am. Mesopresternum ( Fig. 209 ) transverse, boat-shaped, not divided. Mesonotum weakly sculptured, metanotum ( Fig. 210 ) very weakly sculptured with polygonal reticulation; metanotal median pair of setae sharply pointed, 51–53μm apart from anterior margin, about 47μm apart from each other. Fore tarsal tooth ( Fig. 206 ) well-developed. Metathoracic sternopleural sutures present but weak. Fore wings each with 3–6 duplicated cilia, 3–4 in holotype; three sub-basal setae ( Fig. 212 ) expanded, S3 much longer than S2. Pelta ( Fig. 211 ) hat-shaped, with rather broad lateral wings, scarcely sculptured. Tergite IX posteromarginal setae shorter than tube, blunt, at least not pointed, S1 shorter than S2, intermediate setae slender, shorter than S1. Tube 0.52 times as long as head, 2.0 times as long as wide in holotype. Terminal setae almost as long as tube, or a little shorter.

Measurements (holotype female in μm). Body length about 2050 (distended). Head length 238, from anterior margin of eyes 220, width across eyes 178, maximum width across cheeks 187; eyes length 90, width 56; diameter of posterior ocelli 16–18; postocular setae 50–52.Antenna total length about 405, segments I–VIII length (width) as follows: 42 (38), 45 (27), 63 (31), 65 (30), 55 (25), 45 (24), 39 (22), 33 (12). Pronotum length 145, width 235. Setae on prothorax: am 32–36, aa about 40, ml 40–45, pa 45–50, epim 54–55, cox 40. Fore wing length 850. Sub-basal wing setae: S1 45 –47, S2 50 –52, S3 80–83. Tergite IX setae: S1 103–105, S2 113–115. Tube length 124, maximum width 62; terminal setae about 120.

Male (macroptera). Distended body length: 1.7–1.9mm. Colour similar to female. Postocular setae not close together, more than 100μm apart from each other. Prothorax enlarged in large male; fore legs ( Figs 207 & 208 ) stout, fore femur enlarged, without apical tubercles, fore tibia unarmed, fore tarsal tooth stout. Abdominal sternite VIII without pore plate; tergite IX S2 setae shorter than 1/3 length of S1, intermediate setae longer than S2. Tube 0.53–0.55 times as long as head.

Measurements (paratype large male in μm). Body length about 1880 (distended). Head length 203, from anterior margin of eyes 185, width across eyes 158, maximum width across cheeks 165; eyes length 75, width 55. Antenna total length 375–370, segments I–VIII length (width) as follows: 40 (37), 42 (25), 60 (29), 61 (28), 50 (24), 42 (21), 37 (21), 32 (11). Pronotum length 150, width 224. Setae on prothorax: am 30–32, aa 50, ml 50–55, pa 45–55, epim 50, cox 45. Fore wing length 780. Sub-basal wing setae: S1 50, S2 53 –58, S3 85–87. Tergite IX setae: S1 90–100, S2 25 –30. Tube length 108, maximum width 55; terminal setae about 110.

Type series. Holotype: macropterous female, Peninsular Malaysia, Cameron Highland, foot of Gnung Jasal, on dead leaves and branches, 19.ix.1990, TN & SO . Paratypes: Peninsular Malaysia, 7 females and 3 males, collected together with holotype; Cameron Highland , nr. Brinchang , 2 females and 1 male, on dead leaves and branches, 27.viii.1990, TN & SO; nr. Tanah Rata, Robinson water fall, 2 females, on dead leaves and branches, 28.viii.1990, TN & SO; 2 males, Fraser’s Hill, on dead leaves and branches, 14.ix.1990, TN & SO .

Doubtful specimens. The Philippines, Mindanao Is., Mt. Apo, Agko, alt. about 1300m, 2 females, on dead leaves, 31.vii.1979, 1 female, on dead fern, 30.vii.1979, 1male, on dead branches, 30.vii.1979, 1 female, on dead leaves, 1.viii.1979, 1 female and 2 males, on dead leaves, 2.viii.1979, 4 females and 1 male, 3.viii.1979, 4 females and 2 males, on dead palmae fronds, 4.viii.1979, SO; Luzon Is, Quezon National Forest Park , 2 females and 2 males, on dead Palmae fronds, 20.vii.1979, 1 female, on dead leaves, 22.vii.1979, SO; Luzon Is., Bicol National Park , 1 male, on dead Palmae fronds, 12.viii.1979, SO .

Remarks. H. laurencei is distributed in the mountainous area of Peninsular Malaysia, and obviously closely related to H. adoraneoides sp. n. described above from Java and Bali, Indonesia. Despite their body colour is quite dissimilar, they share some character states as follows: head and pronotum not sculptured; postocular setae rather close together in female, but wider apart in male; fore femora and tibiae unarmed even in large male; mesopresternum transverse, boat-shaped; pelta very weakly sculptured; abdominal sternite VIII with no pore plate in male. Several females and males listed above under the doubtful specimens from the Philippines are very similar to this species, but have some differences as follows: mid and hind tibiae darker, brown with pale bases and apices; head shorter than 1.2 times as long as wide; prosternal ferna and mesopresternum stouter; fore tarsal tooth smaller; sub-basal wing setae S3 shorter, a little longer than S2; pelta distinct.

The specific name is dedicated to celebrate Dr. Laurence A. Mound's 90th birthday and to honor him.

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 205–214. Hoplandrothrips laurencei sp. n. (205) Head and prothorax, female; (206) fore leg, female; (207) fore leg, male; (208) fore leg, large male; (209) prosternum and mesopresternum, female; (210) metanotum, female; (211) pelta, female; (212) sub-basal wing setae, female; (213) antennal segments III–VIII, female; (214) tube, female.