A new species of the flower bug genus Orius Wolff (Hemiptera: Anthocoridae) cryptically inhabiting Hibiscus tiliaceus L. (Malvaceae) Author Yasunaga, Tomohide text Zootaxa 2019 2019-07-04 4629 1 122 132 journal article 26297 10.11646/zootaxa.4629.1.9 92f25115-f0a9-440a-948e-80327772c861 1175-5326 3268342 EAEDDAF6-8238-4B02-9890-54BECF01181E Key to Japanese species of Orius 1. Pronotum with four (anterior + posterior) corner setae ( Fig. 5G )................................................ 2 - Pronotum with either anterior or posterior corner setae, or lacking any........................................... 4 2. Hemelytron uniformly shiny fuscous; flagellum bifurcate................................... O. (Trichorius) atratus - Hemelytron almost entirely pale brown, with cuneus sometimes narrowly darkened; flagellum simple, not branched....... 3 3. Pronotum wide, not much polished, densely setose, with wide collar area, narrow callus and angulate anterolateral corner; inhabiting a deciduous oak, Quercus accutissima in Honshu and Kyushu. ..................... O. (Xylorius) miyamotoi - Pronotum trapezoidal, highly polished, almost impunctate and sparsely setose, with narrower collar area, wide callus and rather rounded anterior corner; inhabiting a fabaceous vine, Pueraria montana on Okinawa Island of Ryukyus...... O. (O.) takaii 4. Dorsal vestiture very short; pronotal callus flat, distinctly and deeply punctate; hemelytron uniformly pale yellow, semitransparent.......................................................................... O. (Dimorphella) tantillus - Dorsum with noticeable setae; callus more or less inflated, with sparse and fine punctures; hemelytron pale brown; cuneus usually with darkened (at least) apical part (often uniformly dark brown in O. hibiscus and O. strigicollis )............................................................................................. 5, species of subgen. Heterorius 5. Body obviously tiny, with total length < 1.6 mm ( ♂ ) / < 1.8 mm ( ♀ ); legs generally short, with metatibia shorter than 0.5 mm ........................................................................... O. (Heterorius) hibiscus sp. n. - Body moderate in size, longer than 1.7 mm ( ♂ ) / 1.9 mm ( ♀ ); legs long, with metatibia longer than 0.5 mm (usually 0.6–0.7 mm )................................................................................................ 6 6. Head bicolorous, fuscous with yellow or yellow-brown clypeus; pronotum oily shiny, with noticeable anterior corner seta ( Fig. 5A ), and very sparsely distributed punctures and setae; pronotal callus widened and flattened; all legs uniformly yellow............................................................................................. O. (H.) nagaii - Head uniformly fuscous; pronotum weakly shining, with distinct punctures and semierect setae but lacking corner seta ( Fig. 5D ); pronotal callus narrow, more or less inflated; femora and/or tibiae usually partly or widely darkened............... 7 7. Metafemur entirely pale, or if metafemur darkened, then its apex and entire metatibia also fuscous; paramere with slender, stout conus and short flagellum ( Fig. 5F ); copulatory tube short, tiny (< 0.05 mm ), without apical segment........ O. (H.) sauteri - Metafemur usually dark, always with pale apex; metatibia sometimes darkened except for base and apex; paramere with wide and disk-like conus and long flagellum ( Figs. 4D, O ); copulatory tube ≥ 0.1 mm , with both apical and basal segments elongate as in Fig. 2H........................................................................................ 8 8. Cuneus (usually at least its apical half) infuscate, well contrasting to yellowish corium (cf. Fig. 1F ); paramere with small denticule removed from base of flagellum ( Fig. 4E ); basal segment of copulatory tube expanded at apex.... O. (H.) strigicollis - Cuneus entirely pale, or darkened at apex; paramere with large denticule contiguous to base of flagellum ( Fig. 4O ); basal segment of copulatory tube slender and linear..................................................... O. (H.) minutus