Asianthrips dasycornis, Okajima & Masumoto, 2022

Okajima, Shuji & Masumoto, Masami, 2022, The genus Asianthrips an Oriental fungus-feeding phlaeothripine (Thysanoptera, Phlaeothripidae), Zootaxa 5124 (2), pp. 101-138 : 112-113

Asianthrips dasycornis sp. n.

( Figs 6–7 , 55–61 )

Female macroptera. Body brown ( Fig. 6 ). Antennal segment III brown, concolourous with the remaining segments, or a little paler, yellowish basally. All femora brown, somewhat yellowish at apical 1/4; tibiae almost yellow, often very weakly shaded, tarsi yellow. Fore wings very weakly shaded with brown. Body setae almost colourless. Head ( Fig. 55 ) a little longer than wide, about 1.1 times as long as wide in holotype; dorsal surface generally sculptured with transverse reticulation, but ocellar triangle with very weak polygonal reticulation. Cheeks slightly incut just behind eyes, narrowed toward base. Postocular setae a little shorter than eyes. Postocellar setae almost as long as a diameter of posterior ocellus, or a little shorter. Eyes well developed, about 0.4 times as long as head in holotype. Antennal segments VII and VIII somewhat broadly fused, but segment VIII not constricted at base, cone-shaped ( Fig. 57 ); segment III with three sense cones; segment IV the largest, with a series of 15–18 short and stout setae on ventral surface, segment V with 10–12 same setae ( Fig. 58 ). Maxillary stylets almost reaching postocular setae, rather wide apart, much wider than 1/3 of the head width apart at the basal collar of head. Pronotum ( Fig. 55 ) almost smooth, 0.63 times as long as head and 1.76 times as wide as long in holotype; epim and pa subequal in length, a little longer than 1/2 of median pronotal length. Metanotum polygonally reticulated anteriorly, longitudinally reticulated posteriorly. Mesopresternum and mesoeusternum ( Fig. 59 ) widely fused, without distinct suture between them. Fore tarsus unarmed. Fore wings with 3–4 duplicated cilia, 3– 3 in holotype. Tergites normal, tergites III–V not narrow, much wider than pronotum. S1 and S2 setae on tergite IX blunt or very weakly expanded, at least not pointed, S2 a little longer than S1; S1 0.82 –0.85 times as long as tube. Tube ( Fig. 61 ) 0.58 times as long as head in holotype. Anal setae a little shorter than tube.

Measurements. Female holotype (mac.) in microns. Distended body length about 1500. Head length 147, width across cheeks 134. Compound eye dorsal length 58. Pronotum median length 92, width 162. Fore wing length about 600. Tube length 85, width across base 50. Antenna length about 330, segments III–VIII length (width) as follows: 47 (28), 54 (30), 46 (25), 45 (23), 40 (20), 22 (12). Postocular setae about 50. Pronotal aa 30–32, am 38–40, ml 40–45, pa 52–52, epim 50–52. S1 setae on tergite IX 70–72, S2 setae on tergite IX 83–85. Anal setae 80–84.

Female microptera (non-paratype). Somewhat similar in colour and structure to macropterous female, except for the followings: Eyes smaller, about 0.3 times as long as head ( Fig. 56 ); ocelli absent; antennal segment IV not so large, segments IV and V without a series of setae on ventral surface; metanotal sculpture weaker; abdominal tergites without sigmoid wing retaining setae ( Fig. 60 ); S1 and S2 on tergite IX subequal in length, S1 0.92 –0.97 times as long as tube; tube 0.64 times as long as head; anal setae a little longer than tube.

Measurements. Non-paratype female (mic.) in microns. Distended body length about 1600. Head length 140, width across cheeks 138. Compound eye dorsal length 40. Pronotum length 93, width 188. Tube length 90, width across base 53. Antenna length 330, segments III–VIII length (width) as follows: 48 (27), 48 (27), 43 (27), 44 (25), 40 (21), 30 (15). Postocular setae 70–70. Pronotal aa 35–40, am 46–51, ml 57–58, pa 62–65, epim 57–62. S1 setae on tergite IX 83–87, S2 setae on tergite IX 84–86. Anal setae 100–103.

Male microptera (non-paratype). Very similar in colour ( Fig. 7 ) and structure to micropterous female, but body smaller. Fore tarsi unarmed.

Measurements. Non-paratype male (mic.) in microns. Distended body length 1150. Head length 117, width across cheeks 107. Compound eye dorsal length 37. Pronotum length 85, width 138. Tube length?70, width across base 45. Antenna length 275, segments III–VIII length (width) as follows: 39 (23), 38 (25), 35 (22), 35 (19), 32 (18), 27 (12). Postocular setae 43–48. Pronotal aa?25, am 31–33, ml 35–38, pa 40–45, epim 35–37. S1 setae on tergite IX 50–55, S2 setae on tergite IX 25. Anal setae about 70.

Type series. Holotype female (mac.): Peninsular Malaysia, Fraser’s Hill, on dead leaves and branches, 14.ix.1990 (TN & SO) . Paratypes: Peninsular Malaysia, Cameron Highland, on dead leaves and branches, 1 female (mac.), Tanah Rata , 18.ix.1990, 1 female (mac.), foot of Gunung Jasar , (TN & SO). Borneo , 3 females (mac.), Sabah, about 3km N from Kundasang , 19.ix.1990 on dead leaves and branches, 6.ix.1990 (TN & SO) .

Non-paratypic specimens. Peninsular Malaysia, 2 males (mic.), foot of Gunung Jasar , on dead leaves and branches, 19.ix.1990 (TN & SO). Borneo, 1 female (mic.), Sabah, about 3km N from Kundasang, on dead leaves and branches, 6.ix.1990 (TN & SO). The Philippines, 1 female (mac.), Mindanao Is., North Cotabato, Ilomavis, on dead leaves, 28.vii.1979 (SO) .

Remarks. Three micropterous specimens, one female and two males, listed above as non-paratypic specimens were collected together with paratype macropterous females. They are probably conspecific with A. dasycornis , but the antennal segments IV and V do not have a series of short and stout setae as in macropterous female. A nonparatypic macropterous female also listed as above collected from the Philippines is indistinguishable from this species.

Figures

FIGURES 1–10. Asianthrips species. (1) A. balianus, female (mac). (2) A. bamboosielloides, female (mac). A. bicolor, 3–4; (3) Female (mac); (4) Female (mic). (5) A. borneoensis, female (mac). A. dasycornis, 6–7; (6) Female (mac); (7) Male (mic). A. denticornis, 8–9; (8) Male (mac); (9) Female (mic). (10) A. longior, female (mac).

FIGURES 55–61. Asianthrips dasycornis, sp. n., female. (55) Head–tergite II (mac); (56) Head– tergite (mic); (57) Antenna, dorsal aspect (mac); (58) Antenna, ventral aspect (mac); (59) Ferna–mesopresternum (mac); (60) Tergite IV (mic); (61) Tube (mac).