Vilbasteana oculata (Lindberg, 1929)

Ohara, Naomichi & Hayashi, Masami, 2022, Recognition of the genera Igutettix Matsumura and Vilbasteana Anufriev (Hemiptera: Cicadellidae: Typhlocybinae), with discovery of a new related genus from Japan, Zootaxa 5125 (1), pp. 63-74 : 70

Vilbasteana oculata (Lindberg, 1929) comb. rev.

( Figs. 3, 4 , 10 , 15, 16 , 35–38 )

Dicraneura [sic!] oculata Lindberg, 1929 , Comm. Biol., 3: 10 [Ussuri, Spasskaja].

Dikraneura maculosa Vilbaste, 1968 , Über die Zikandenfauna des Primorje Gebietes : 76 [Primorsky kray, Cedar Pad].

Vilbasteana oculata: Anufriev 1970 , Bull. Acad. Polon. Sci. II, 18: 261.

Igutettix oculatus: Dworakowska 1993 , Entomol. Abhandl. Staatl. Mus. Tierk. Dresden, 55: 99; Hossain et al. 2021, Zootaxa, 4951: 357.

Head 0.8 times as wide as pronotum; vertex about 2.3 times as wide as dorsal midline, about 1.4 times as long as next to eye, 0.4 times as long as pronotum. Pronotum about 1.7 times as wide as long, about 1.8 times as long as mesonotum. Front femur with seta AM1 stout, long and situated near ventral margin; intercalary row composed of 7‒8 setae evenly spaced distal half. Hind femur with macrosetal formula 2+1+1; tibia with setal row AV composed of 4 preapical macrosetae. Female 7 th sternite rectangular with posterior margin produced caudally and notched near middle.

Body length: ♂ 4.4‒4.6 mm (4.4 mm); ♀ 4.4‒4.6 mm (4.5 mm).

Male genitalia. Connective with stem slightly shorter than arm, and with central lobe. Aedeagus with preatrium long, 0.8 times as long as shaft, with shaft narrowed at basal ⅓ and strongly curved cephalad in basal ⅔.

Female genitalia. First valvula of ovipositor slightly expanded and gradually narrowed subapically, with strigate sculpture in apical ⅓, arranged into broad dorsal and narrow middle and ventral areas. Second valvulae symmetrical, sinuate subapically, with dorsal margins slightly serrated. Third valvula narrow in basal half, abruptly broadened subapically and gradually narrowed.

Material examined. Holotype: ♀, “Ussuri: Spasskaja, 23. IX. 1917, Y. Wuorentaus ”, “ Dicraneura oculata n. sp. (handwriting), Håk. Lindb. det.”, “Mus. Zool. H:fors, Spec. typ. No 7516, Dicraneura oculata Lindb. (handwriting)”, “ Alebroides oculatus (Lb) (handwriting), J. Vilbaste 1968”, “Mus. Zool. Helsinki, N:o 17457 (red printed label)”, “Mus. Zool. Helsinki, Loan No. HE 1026 (red printed label)” ( FMNH). [ Finland] 4♂ 2♀, Arabiankatu, Toukala, Helsinki, 26. VI. 2010, M. Hayashi leg. ( ELKU). [ Russia] 2♂ 1♀, St. Petersburg University , Sankt Peterburg, 23. VIII. 2002, V. M. Gnezdilov leg. ( ZIN).

Distribution. Finland, Estonia, Latvia, Lithuania, Belarus, Russia (European part, Far East), Korea.

Bionomics. This species is known as an invasive lilac leafhopper in Europe, feeding on some oleaceaous trees: Syringa spp. , Fraxinus excelsior and Ligustrum vulgare ( Söderman 2005, Stalažs 2013).

Figures

FIGURES 1–8. Habitus in dorsal and lateral views. — 1, 2, Igutettix pulverosus Matsumura sp. rev. (♂ 3.7 mm); 3, 4, Vilbasteana oculata (Lindberg) comb. rev. (♂ 4.5 mm); 5–8, Cornicola mizuki gen. et sp. nov. (5, 6, ♂ 4.2 mm; 7, 8, ♀ 4.7 mm).

FIGURES 9–12. Face in males (9–11) and female (12). — 9, Igutettix pulverosus Matsumura sp. rev.; 10, Vilbasteana oculata (Lindberg) comb. rev.; 11, 12, Cornicola mizuki gen. et sp. nov.

FIGURES 13–18. Fore and hind wings in males. — 13, 14, Igutettix pulverosus Matsumura sp. rev.; 15, 16, Vilbasteana oculata (Lindberg) comb. rev.; 17, 18, Cornicola mizuki gen. et sp. nov. Scale: 1.0 mm.

FIGURES 31–42. Female 7th abdominal sternite and apex of ovipositor (1st, 2nd and 3rd valvulae) of Igutettix pulverosus Matsumura sp. rev. (31–34), Vilbasteana oculata (Lindberg) comb. rev. (35–38) and Cornicola mizuki gen. et sp. nov. (39–42). — 31, 35, 39, Abdominal sternite in ventral view; 32, 36, 40, 1st valvula of right side in lateral view; 33, 37, 41, 2nd valvulae of right side in lateral view; 34, 38, 42, 3rd valvula of right side in lateral view. Scales: 0.3 mm.