Orius (Orius) inthanonus Yamada and Yasunaga, sp. nov.
Creators: name: Yamada, Kazutaka
name: Yasunaga, Tomohide
name: Artchawakom, Taksin
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Anthocoridae
Orius
Orius inthanonus

description: Orius (Orius) inthanonus Yamada and Yasunaga, sp. nov. (Figures 3I,J, 5K, 6F, 9F, 12C, 16D – F)
Type material
Holotype. ♂ (NSMT-I-He 74287; Figures 3I, J, 5K, 6F, 9F, 12C, 16D – F), (THAILAND), Maeo Khun Klang, 1300 m, Doi Inthanon, 20 October 1983, M. Sakai (NSMT). Right antenna, left antennal segments III and IV, pronotal corner setae excepting left posterolateral one, and long, erect setae between each eye and ocellus are missing.
Diagnosis
Recognised by the following characters: body generally blackish brown (Figure 3I, J); hemelytra brown to greyish brown, embolium posteriorly darkened, cuneus darker (Figure 3I); legs yellowish brown, meso- and metafemora dark brown (Figure 3J); male profemora with six fuscous small teeth on ventral side; cone thin, acute apicad, elevated dorsally with a projection (Figure 16D – F); denticule lacking; flagellum robust, roundly curved, noticeably expanded from base to middle in lateral view (Figure 16D – F).
Description
Male (holotype). Colouration: body generally blackish brown (Figure 3I, J). Head brown to blackish brown, with paler apex (Figure 5K); eyes reddish brown, ocellus and its surrounding area red to reddish brown. Antennal segments I and II yellowish brown (Figure 5K). Labium uniformly pale yellow, but segments I and II with fuscous tinge (Figure 3J). Pronotum and scutellum uniformly blackish brown (Figure 5K). Hemelytra brown to greyish brown; embolium posteriorly darkened; cuneus darker than remainder area of corium; membrane uniformly somber dark brown (Figure 3I). Legs pale yellow to yellowish brown; meso- and metafemora dark brown (Figure 3J). Venter of thorax and abdomen dark brown, tinged with darker orange brown (Figure 3J). Structure: body elongate oval (Figure 3I). Head smooth, shiny, about 0.66 times as long as width across eyes, and with a longer erect seta on each side of clypeus, and near anteromedial margin of each eye; ante-ocular portion 0.64 times as long as length of eye in dorsal view; vertex about 1.8 times as wide as eye in dorsal view; eye 1.4 times as long as eye width in dorsal view; postocular portion constricted; neck distinct (Figure 9F). Antennal segment I stout, much exceeding apex of head, sparsely covered with short suberect setae; segment II 0.63 times as long as head width across eyes, densely covered with suberect setae which are shorter than width of the segment (Figures 5K, 9F). Labium sparsely covered with short suberect setae. Pronotum shiny, smooth, sparsely covered with short decumbent setae and tiny punctures; anterior margin slightly concave, width about as wide as mesal length; lateral margin moderately curved; lateral carinae distinctly expanded; posterior margin concave, width 2.5 times as wide as anterior pronotal width; collar distinct, strigose, demarcated by shallow transverse impression from callus; callus strongly convex, with scattered short setae, demarcated posteriorly by deep sinuate transverse impression (Figures 5K, 9F). Scutellum nearly equilateral, shorter than basal width, deeply depressed through middle, sparsely covered with short decumbent setae and tiny punctures. Hemelytra overall sparsely covered with short decumbent setae and tiny punctures; maximum width of endocorium twice as wide as embolium; cuneal margin 0.5 times as long as embolial margin; membrane with one indistinct vein located near costal margin. Ostiolar peritreme similar in general shape to O. fi liferus and O. machaerus; anterior area to median furrow in ostiolar peritreme smooth, about as wide as maximum width of posterior area to median furrow; posterior area squamous entirely; supracoxal area transversely rugose (Figure 6F). Legs densely covered with stramineous decumbent setae; male protrochanters bearing one fuscous small tooth on ventral side; male profemora with six fuscous small teeth on ventral side; male protibiae with a row of 16 fuscous small teeth on ventral side. Male genitalia (Figures 12C, 16D – F): pygophore ovoid shaped, posteroventrally covered with four long, stout setae which are shorter than length of pygophore (Figure 12C); mediodorsal surface densely distributed with short, suberect setae; cone thin, acute apicad in dorsal view, elevated dorsally with a projection (Figure 16D – F); denticule lacking; flagellum robust, roundly curved, longer than twice of maximum width of cone, basally thickened in dorsal view, noticeably expanded from base to middle in lateral view, extending well beyond the left edge of pygophore (Figure 16D – F).
Female. Unknown.
Measurements (mm)
[♂ (n = 1)]. Body length 2.05; head length (excluding neck) 0.25; head width across eyes 0.38; vertex width 0.18; width between ocelli 0.15; lengths of antennal segments I – II: I – 0.09, II – 0.24, III – missing, IV – missing; lengths of labial segments II – IV: II – 0.09, III – 0.25, IV – 0.22; anterior pronotal width 0.30; mesal pronotal length 0.30; basal pronotal width 0.76; length of embolial margin 0.68; length of cuneal margin 0.35; maximum width across hemelytra 0.84.
Etymology
Named after the type locality, Doi Inthanon in Chom Thong District, Chiang Mai Province, northern Thailand; a noun in apposition.
Distribution
Northern Thailand (Chiang Mai).
Remarks
Orius inthanonus is distinctive among the species of the subgenus Orius in having brown to greyish brown hemelytra with posteriorly darkened embolium and darker cuneus and the male profemora with six fuscous small teeth on ventral side. The structure of male genitalia of O. inthanonus somewhat resembles that of O. machaerus; however, it differs from the latter by the roundly curved flagellum being noticeably expanded from base to middle in lateral view.
Habitat
Unknown.
description: Published as part of Yamada, Kazutaka, Yasunaga, Tomohide & Artchawakom, Taksin, 2015, The flower bug genus Orius Wolff, 1811 (Hemiptera: Heteroptera: Anthocoridae: Oriini) of Thailand, pp. 1103-1157 in Journal of Natural History 50 on pages 1131-1133, DOI: 10.1080/00222933.2015.1104393, http://zenodo.org/record/3990373