Arcofaciella Fennah 1956
Creators: name: Li, Hong-Xing
name: Chen, Xiang-Sheng
name: Yang, Lin
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Delphacidae
Arcofaciella

description: Genus Arcofaciella Fennah, 1956
Type species
Arcofaciella verrucosa Fennah, 1956.
Diagnosis
Head including eyes (Figs 1G, 2A, 3G, 4A, 5G, 6A) as wide as or wider than pronotum. Vertex (Figs 1G, 2A, 3G, 4A, 5G, 6A) short, trapezoidal; anterior margin transverse, carinate, somewhat incised medially at areolet; posterior margin transverse; lateral margins concave. Frons (Figs 1H, 2C, 3H, 4C, 5H, 6C) at midline longer than wide at widest part, widest above level of ocelli; lateral margins convex; median carina forked at fastigium, areolet weakly depressed. Postclypeus (Figs 2B–C, 4B–C, 6B–C) in lateral view more or less at right angle or obtuse angle to base of frons; in ventral view lateral carinae straight, converging to labrum, median carina absent or present. Rostrum with apex reaching mesotrochanters. Antennae (Figs 1H, 2C, 3H, 4C, 5H, 6C) cylindrical, short, stout, second segment markedly longer than first segment, but both together not exceeding length of eye. Pronotum (Figs 1G, 2A, 3G, 4A, 5G, 6A) subequal or longer than vertex along midline, sloping anteriorly and laterally; anteriorly shallowly convex, posteriorly shallowly excavate; median carina distinct, lateral carinae developed only in anterior portion in line with lateral margins of vertex; disc with two pits on each side of median carina. Mesonotum (Figs 1G, 2A, 3G, 4A, 5G, 6A) strongly convex, almost gibbous, strongly sloping laterally and posteriorly, disc tricarinate with lateral carinae feeble. Mesoscutellum (Figs 1G, 2A, 3G, 4A, 5G, 6A) distinctly depressed, horizontal, median line of scutum obsolete posteriorly, but present on scutellum, with a distinct groove between scutum and scutellum. Forewings (Figs 2D, 4D, 6D) long, corium enfolding abdomen at region of node, costal margin sinuate, concave distad of node, apical margin shallowly undulate, forks of ScP-R and CuA distad of union of claval veins. Legs relatively short and stout, profemora shorter than procoxae (e.g., Figs 1F, 3F, 5C), hind tibiae with two lateral spines (one very small at base, the other large at about one third from apex) (Fig. 1F) and five teeth at apex; hind tarsomere I with 7, 8 or 9 small even teeth at apex, hind tarsomere II with 5 apical teeth. Anal segment of male (Figs 2E, 4E, 6E) in caudal view ring-like, lateroapical angles weakly protruding caudad or not produced. Pygofer (Figs 2G, 4H, 6G) without medioventral process. Genital styles (Figs 2H–J, 4I–J, 6H–I) long. Aedeagus (Figs 2K–M, 4K–L, 6J–K) with phallotheca. Aedeagus tubular, apical part recurved downward. Phallotheca with valvular process, basal ⅔ quadrate.
Remarks
This genus is similar to Arcofacies Muir, 1915 but differs from it by: frons with lateral margins distinctly arched (Figs 1H, 2C, 3H, 4C, 5H, 6C) (vs frons with lateral margins subparallel in Arcofacies (Chen et al. 2007: figs 2, 11, 19, 25)); antennae short, obviously not reaching frontoclypeal suture (Figs 1H, 2C, 3H, 4C, 5H, 6C) (vs antennae long, nearly reaching or surpassing frontoclypeal suture in Arcofacies (Chen et al. 2007: figs 2, 11, 19, 25)); pronotum with lateral carinae not extending to hind margin (Figs 1G, 2A, 3G, 4A, 5G, 6A) (vs pronotum with lateral carinae extending to hind margin in Arcofacies (Chen et al. 2007: figs 1, 10, 18, 24)); spinal formula of hind leg 5-8-5 or 5-9-5 (vs spinal formula of hind leg 5-6- 4 in Arcofacies).
Host plant
Bambusoideae Luerss.
Distribution
Oriental region (China, Malay Peninsula, India).
Key to species (males) of Arcofaciella Fennah, 1956
1. Frons in profile inclined anteriorly (Figs 3I, 4B, 5I, 6B); clypeus in profile bent at right angle to frons (Figs 3I, 4B, 5I, 6B), with median carina absent (Figs 4C, 6C) ....................................................... 2
– Frons in profile not inclined anteriorly (Figs 1I, 2B); clypeus in profile bent at obtuse angle to frons (Figs 1I, 2B), with median carina present (Fig. 2C) ............................................. A. indiana sp. nov.
2. Genital styles in posterior view with an angled process medioventrally (Fig. 4I) ............................. ........................................................................................................... A. obflexa Guo & Liang, 2005
– Genital styles in posterior view without angled process medioventrally (Fig. 6H) ......................... 3
3. Genital styles in posterior view with hamular process at inner apical laterally (Fig. 6H) .................. .................................................................................................................. A. verrucosa Fennah, 1956
– Genital styles in posterior view with quadrate process at inner apical laterally ................................. ............................................................................................................... A. penangensis (Muir, 1919)
description: Published as part of 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, pp. 51-66 in European Journal of Taxonomy 748 (1) on pages 52-53, DOI: 10.5852/ejt.2021.748.1341, http://zenodo.org/record/4745094