Arcofaciella obflexa Guo & Liang, 2005

Li, Hong-Xing, Chen, Xiang-Sheng & Yang, Lin, 2021, Review the bamboo-feeding genus Arcofaciella Fennah, 1956 (Hemiptera: Fulgoromorpha: Delphacidae) with description of a new species from India, European Journal of Taxonomy 748 (1), pp. 51-66 : 57-60

Arcofaciella obflexa Guo & Liang, 2005

Figs 3–4

Material examined

CHINA • 1 ♂; Yunnan, Jinghong ; 21°24′ N, 101°71′ E; 5 Aug. 1958; Y.S. Wang leg.; on bamboo; GUGC-FDTA-19580801 • 1 ♂; Yunnan, Jinghong ; 21°24′ N, 101°71′ E; 8 Jun. 2011; J.K. Long leg.; on bamboo; GUGC-FDTA-20110601 • 4 ♂♂, 2 ♀♀; Yunnan, Yingjiang ; 24°74′ N, 97°56′ E; 8 Aug. 2015; X.S. Chen and L. Yang leg.; on bamboo; GUGC-FDTA-20150801 to 20150806 • 7 ♂♂, 5 ♀♀; Yunnan, Yingjiang ; 24°74′ N, 97°56′ E; 19 Aug. 2018; H.X. Li, F.E. Li and Q. Luo leg.; on bamboo; GUGC- FDTA-20180801 to 20180812 • 4 ♂♂, 4 ♀♀; Yunnan, Ruili ; 24°01′ N, 97°84′ E; 13 Aug. 2018; H.X. Li and Q. Luo leg.; on bamboo; GUGC-FDTA-20180813 to 20180820 • 13 ♂♂, 5 ♀♀; Yunnan, Jinghong, Menglong ; 21°57′ N, 100°67′ E; 21 Jun. 2019; H.X. Li, S.Y. Xun, N. Gong and F.E. Li leg.; on bamboo; GUGC-FDTA-20190601 to 20190618 .

Redescription

MEASUREMENTS. Body length including forewing: male 4.3–4.6 mm (N = 10); female 4.5–4.9 mm (N = 10); forewing length: male 3.6–3.8 mm (N = 10); female 3.7–4.0 mm (N = 10).

COLORATION. Vertex ( Fig. 3G ), face ( Fig. 3H ) yellowish green. Antennae ( Fig. 3H ) light scorched green, distal part of first segment and basal part of second segment black brown. Pronotum ( Fig. 3G ), mesonotum ( Fig. 3G ) and legs scorched, abdomen light nacarat, slightly lighter ventrally and disc of first abdominal segment black. Forewings ( Fig. 4D ) grayish brown, darker at base, veins brown with yellowish white granules, veins dashed, apex of longitudinal veins brown.

HEAD AND THORAX.Vertex ( Fig. 4A ) at midline shorter than wide at base (0.28:1), width at apex narrower than at base (0.56:1). Frons ( Fig. 4C ) 1.35 times longer in middle line than widest part, narrower at apex than at base (0.86:1). Postclypeus wider at base than frons at apex. Antennae ( Fig. 4C ) with first segment longer than wide at apex (1.33:1), shorter than second segment (0.63:1). Pronotum ( Fig. 4A ) at midline longer than vertex (1.71:1), lateral carinae arched, medially concave, flexing backwards near middle at sub-right angle and nearly attaining hind margin. Mesonotum ( Fig. 4A ) 2.39 times as long as vertex and pronotum combined in middle line. Forewing ( Fig. 4D ) in middle line longer than wide at widest part (3.12:1). Spinal formula of hind tibia 5-8-5.

MALE GENITALIA. Anal segment in posterior view ( Fig. 4E ) concave medially, lateroapical angle protruding caudad, anal style distinctly elongate and narrow, nearly lanceolate in lateral view ( Fig. 4G ). Pygofer in profile ( Fig. 4F ) with dorsal margin shorter than ventral margin, posterior margin convex, in posterior view ( Fig. 4H ) with opening longer than wide, ventral margin broadly concave, without medioventral process. Genital styles ( Fig. 4I–J ) long, reaching basal anal segment, with an angled process medioventrally and 2 small teeth at outer base laterally, apex with outer apical angle rounded and protruding, slightly dorsad, inner apical angle bifurcate, inner laterodorsal margin with a dull angled process at ⅔ of genital styles near base. Aedeagus ( Fig. 4K–L ) long, tubular, with distinct phallotheca, with basal part lying between two valvular processes of phallotheca, deflecting leftward, apical part recurved downward and reaching ⅔ of phallotheca. Phallotheca almost reaching base of genital styles, apical part warping dorsad, basal part stout, with two valvular processes, in dorsal view with a large and a small round valvular processes, tapering from ⅗ to apex, in right view with three processes near base.

Host plant

Bambusoideae.

Distribution

China (Yunnan).

Figures

Fig. 3. Arcofaciella obflexa Guo & Liang, 2005. A–C, G–I = ♂ (GUGC-FDTA-20190601); D–F = ♀ (GUGC-FDTA-20190602). A. Male habitus, dorsal view. B–C. Same, lateral view. D. Female habitus, dorsal view. E–F. Same, lateral view. G. Head and thorax, dorsal view. H. Face. I. Frons, lateral view. Scale bars: A–F = 1 mm; G–I = 0.5 mm.

Fig. 4. Arcofaciella obflexa Guo & Liang, 2005, ♂ (GUGC-FDTA-20190601). A. Head and thorax, dorsal view. B. Same, lateral view. C. Face. D. Forewing. E. Male genitalia, posterior view. F. Same, lateral view. G. Anal segment, lateral view. H. Pygofer, posterior view. I. Genital style, posterior view. J. Same, lateral view. K. Aedeagus, right lateral view. L. Same, left lateral view. Scale bars: A–D = 0.5 mm; E–J = 0.2 mm; K–L = 0.1 mm.