Asianthrips Okajima

Okajima, Shuji & Masumoto, Masami, 2022, The genus Asianthrips an Oriental fungus-feeding phlaeothripine (Thysanoptera, Phlaeothripidae), Zootaxa 5124 (2), pp. 101-138 : 103-104

publication ID	https://doi.org/ 10.11646/zootaxa.5124.2.1
publication LSID	lsid:zoobank.org:pub:3D3F5EE0-523C-4BAD-83A9-BC26D8D2C613
DOI	https://doi.org/10.5281/zenodo.6404888
persistent identifier	https://treatment.plazi.org/id/AD309E18-1027-FFB9-DBB2-FC9949A92D92
treatment provided by	Plazi
scientific name	Asianthrips Okajima
status

Treatment

Genus Asianthrips Okajima View in CoL

Asianthrips Okajima, 2006: 187 View in CoL . Type species: A. orientalis Okajima, 2006 View in CoL , by monotypy.

Small sized species, wings fully developed or not. Head not elongate, postocular setae well developed, other cephalic setae usually minute; usually one or two (rarely three) minute setae arising within ocellar triangle. Eyes large in macroptera, small in microptera. Ocelli well developed in macroptera. Antennae eight-segmented, segment VIII broadly or narrowly fused to segment VII; segment III with two (1 + 1) or three (1 + 2), IV with four (2 + 2) sense cones; segment III asymmetrical; intermediate segments often with a series of 10–20 setae on ventral surface (cf. figs 58 & 65); campaniform sensilla on segment II situated near apex. Maxillary stylets variable, usually retracted into head capsule, rarely shorter, rather apart from each other; maxillary bridge often present, but very weak. Prothoracic notopleural sutures complete; usual five pairs of setae well developed. Basantra present, but weak; ferna and prospinasternum developed. Fore tarsal tooth usually not developed, rarely developed in males. Metathoracic sternopleural suture absent; mesopresternum fused medially to mesoeusternum, reduced or distinct sutures present between these plates at both sides. Fore wings, if fully developed, weakly constricted medially; duplicated cilia usually present; sub-basal setae usually developed and expanded. Pelta variable in shape. Abdominal terga II to VII each with two pairs of wing-retaining setae at least in macroptera; pore plates absent on male sternite VIII. Tube tapering, shorter than head, straight-sided. Anal setae shorter than tube.

Key to species

1. Antennal segments VII and VIII narrowly fused, segment VIII slender, distinctly constricted basally, rather lanceolate (cf. Fig. 30 View FIGURES 29–35 )................................................................................................ 2

-. Antennal segments VII and VIII widely fused, segment VIII broad, not constricted basally, rather artillery shell-shaped, or cone-shaped (cf. Fig. 37)............................................................................... 3

2. Antennal segment III with three sense cones; body largely yellowish ( Fig. 1 View FIGURES 1–10 ); antennal segments V and VI bicoloured, brown at distal 2/3, yellowish at basal 1/3............................................................. balianus View in CoL sp n.

-. Antennal segment III with two sense cones; body pale brown to brown ( Fig. 28 View FIGURES 23–28 ); antennal segments V and VI uniformly brown................................................................................ vietnamensis View in CoL sp. n.

3. Body bicolourous yellow and brown, or largely yellow; often largely brown, but abdominal segments bicoloured, segments VI–IX yellowish, segments II–V brownish................................................................. 4

-. Body pale brown to dark brown, abdominal segments unicolourous............................................ 11

4. Abdominal segments II–V brown, VI–IX yellowish................................................... orientalis View in CoL

-. Abdominal segments largely yellowish.................................................................... 5

5. Head uniformly yellow, or largely yellow.................................................................. 6

-. Head brown to dark brown.............................................................................. 8

6. Maxillary stylets retracted to 1/2 of head or longer ( Figs. 94 & 95 View FIGURES 94–100 ); abdominal tergite II distinctly shaded with brown ( Figs. 15, 16 View FIGURES 11–22 & 98 View FIGURES 94–100 ); mesopresternum and mesoeusternum narrowly fused, width of fusion less than 1/2 of mesopresternum width ( Fig. 99 View FIGURES 94–100 )....................................................................................... nobilis View in CoL sp. n.

-. Maxillary stylets retracted to 1/3 of head or shorter ( Figs 109 View FIGURES 109–116 & 131 View FIGURES 131–136 ); abdominal tergite II entirely yellow or weakly shaded with brown antero-laterally; mesopresternum and mesoeusternum widely fused, width of fusion more than 3/5 of mesopresternum width............................................................................................... 7

7. Body largely yellow except for brown tube ( Figs 109–111 View FIGURES 109–116 ); antennal segments VI and VII each with 3–4 setae on dorsum ( Fig. 112 View FIGURES 109–116 ); tube about 0.5 times as long as head in female................................................ pallens View in CoL sp. n.

-. Head largely yellow, but ocellar area and genal areas just behind eyes brownish; mesothorax, pleural regions of metathorax and antero-lateral portions of abdominal tergite II weakly shaded with brown; antennal segments VI and VII each with 5–6 setae on dorsum ( Fig. 132 View FIGURES 131–136 ); tube about 0.6 times as long as head in female................................... sufflavus View in CoL sp. n.

8. Prothorax yellow..................................................................................... 9

-. Prothorax brown..................................................................................... 10

9. Mesopresternum and mesoeusternum narrowly fused, with distinct sutures between them at both sides ( Fig. 128 View FIGURES 124–130 ); antennal segments IV and V each with a series of 7–11 setae arranged in a longitudinal line on ventral surface ( Fig. 125 View FIGURES 124–130 ), at least in macropterous female......................................................................... setifer View in CoL sp. n.

-. Mesopresternum and mesoeusternum widely fused, with vestigial short sutures between them at both sides (Fig. 44); antennal segments IV and V do not have such a series of setae (Fig. 43)....................................... bicolor View in CoL sp. n.

10. Maxillary stylets retracted into middle of head capsule ( Figs. 62 & 63 View FIGURES 62–71 ); fore wing with duplicated cilia...... dentipes View in CoL sp. n.

-. Maxillary stylets V-shaped and very short, reaching only to basal collar of head (Fig. 36); fore wing without duplicated cilia.................................................................................. bamboosielloides View in CoL sp. n.

11. Antennal segment III with two sense cones................................................... borneoensis View in CoL sp. n.

-. Antennal segment III with three sense cones............................................................... 12

12. Maxillary stylets V-shaped and very short, reaching only to basal collar (= occipital ridge) of head ( Figs. 88 & 89 View FIGURES 88–93 )............................................................................................... malayanus View in CoL sp. n.

-. Maxillary stylets longer............................................................................... 13

13. Abdominal tergites small, tergites III–V much narrower than sternite, narrower than pronotum ( Fig. 121 View FIGURES 117–123 ).. parvinotus View in CoL sp. n.

-. Abdominal tergites III–V wider than pronotum............................................................. 14

14. Antennal segment III brown, almost as dark as segment IV, with base yellowish ( Fig. 57 View FIGURES 55–61 ); antennal segment IV with a series of 15–18 short and stout setae on ventral surface, segment V with 10–12 same setae ( Fig. 58 View FIGURES 55–61 ), at least in macropterous female........................................................................................ dasycornis View in CoL sp. n.

-. Antennal segment III yellowish, paler than segment IV; a series of ventral short setae on antennal segments present or absent .................................................................................................. 15

15. Mesopresternum and mesoeusternum widely fused, with short sutures between them at both sides ( Fig. 148 View FIGURES 145–150 ); head a little wider than long, at least in macropterae ( Fig. 145 View FIGURES 145–150 ).................................................... taiwanus View in CoL sp. n.

-. Mesopresternum and mesoeusternum narrowly fused, with long sutures between them at both sides; head almost as long as wide or longer....................................................................................... 16

16. Maxillary stylets long, retracted to eyes ( Fig. 72 View FIGURES 72–79 ); antennal segment IV with a series of 18–19 short and stout setae on ventral surface, segments V and VI each with 11–13 and 6–8 same setae, respectively ( Fig. 74 View FIGURES 72–79 ); reticles distinct between eyes............................................................................................... longior View in CoL sp. n.

-. Maxillary stylets shorter, not reaching eyes; a series of ventral short setae on antennal segments absent; reticles very weak or almost smooth between eyes........................................................................... 17

17. Pelta hat-shaped, with distinct lateral wings ( Fig. 142 View FIGURES 137–144 ); head almost as long as wide, or a little longer ( Fig. 137 View FIGURES 137–144 ); antennal segment III entirely yellow; fore femora brown, with apical 1/3 yellow; ocellar region swollen weakly; S1 setae on abdominal tergite IX shorter than S2................................................................ sulawesiensis View in CoL sp. n.

-. Pelta trapezoid, without distinct lateral wings ( Fig. 86 View FIGURES 80–87 ); head longer than wide ( Figs. 80 & 81 View FIGURES 80–87 ); antennal segment III yellow with distal 1/2 shaded with pale brown; fore femora brown, with extreme apices yellowish; ocellar region weakly projected to a cone; S1 setae on abdominal tergite IX longer than S2............................................ magnus View in CoL sp. n.