Stirellus picinus ( Berg, 1879 )

Duan, Yani, Zhang, Yating & Dietrich, Christopher H., 2019, Six new species of Stenometopiini (Hemiptera: Cicadellidae: Deltocephalinae) with redescription of additional species and new distributional records, Zootaxa 4603 (2), pp. 201-240 : 217-218

Stirellus picinus ( Berg, 1879) n. rec.

( Figs 13–14 )

Athysanus picinus Berg, 1879: 263 .

Stirellus picinus, Linnavuori, 1959: 322 .

Description. Length. Male: 3.1–3.6mm; female: 4.2–4.6mm.

Coloration. General color usually from dark brown to yellow green with dark brown maculae ( Fig. 13 A–E). Crown with marks on vertex that are variable, usually with large triangular anterior pair and smaller posterior pair but posterior pair absent in some specimens. Pronotum, mesonotum and scutellum with or without dark brown maculae ( Fig. 13 A–D). Frontoclypeus ochraceous with fuscous arcs ( Fig. 13F ). Forewing translucent veins pale yellow and areas between veins variably infused with dark brown ( Fig. 13 A–E). Femora and tibiae with dark brown marks ( Fig. 13E ). Abdominal sternites variably infused with dark brown ( Fig. 13G ).

Morphology. Head wider than pronotum, subconical, anterior margin rounded to face ( Fig. 13 A–E). Crown nearly as long as or slightly longer than width between eyes ( Fig. 13 A–D). Anteclypeus slightly tapered, extending beyond normal curve of genae ( Fig. 13F ). Pronotum median length nearly as long as median length of crown. Mesonotum and scutellum nearly as long as pronotum ( Fig. 13 A–D). Forewing macropterous, usually exposing apex of abdomen in female ( Fig. 13 A–E).

Male genitalia. Pygofer side with few macrosetae dorsally, dorsal margin slightly concave distally, posterior margin rounded ( Fig. 14A, B ). Subgenital plate convex laterally, macrosetae uniseriate laterally ( Fig. 14D, E ). Style apophysis digitate, short, laterallylaterally curved; preapicalpreapical lobelobe formingforming rightright angleangle ( Fig. 14 F–H). ConnectiveConnectiveConnective Y-shaped, stem broad and nearly as long as arms ( Fig. 14I ). Aedeagal shaft curved strongly dorsad near base, relatively short and broad in lateral view, slightly curved anterad beyond midlength, apex tapered to blunt tip, apex broadened and bifid in dorsal view ( Fig. 14 J–L).

Female. Seventh sternum produced and tapered to shallowly bilobed apex ( Fig. 13G ).

Material examined. 2ƋƋ, 3♀♀, Argentina: Misiones Rt 211 36 km SE jct Rt 12, 450m, 26° 55′ 55" S 54° 43′ 52" W, 5 i 2008, coll. C.H. Dietrich, vacuum, AR5-1 ( INHS) ; 1Ƌ, Argentina: Misiones Pto. Iguazú, Viejo Amer. Campgd , 200m, 25° 37′ 19" S 54° 32′ 52" W, 7 i 2008, coll. C.H. Dietrich, sweeping, AR7-2 ( INHS) ; 1Ƌ, 1♀, Argentina: Corrientes, P.N. Mburucuyà 1.8 km W Campgd, 80m, 28° 1′ 11" S 58° 3′ 18" W, 8 i 2008, coll. C.H. Dietrich, vacuum, AR9-4 ( INHS) ; 1Ƌ, Brazil: Parana nr. Ponta Grossa , 8 ii 1974, coll. S.G. Turnipseed, 969 ( INHS) ; 1Ƌ, Costa Rica Punt 7km, E Las Juntas , 5 ix 1998, coll. C.W. & L.O’Brien ( INHS) ; 1♀, British Virgin Is. Guana Island , 16 x 1993, coll. C. Parilet & J. Cryan ( INHS) .

Distribution. Argentina; Bolivia; Brazil; Colombia; Costa Rica; Virgin Islands; Honduras; Panama; Suriname; Venezuela.

Remarks. This species is here recorded from the British Virgin Islands (Guana Island) for the first time. It is similar to S. mexicanus , but it can be distinguished by the shape of the hind margin of the female seventh abdominal sternum and the apex of the aedeagal shaft.

Figures

FIGURE 13. Stirellus picinus A–D: habitus, dorsal view; E: habitus, lateral view; F: face; G: the end of female abdomen, ventral view. A, B, F: male; C–E, G: female.

FIGURE 14. Stirellus picinus A, C: male pygofer and segments X and XI, lateral and dorsal view, respectively; B: male pygofer lobe, lateral view; D: valve, subgenital plates and styles, ventral view; E: valve, subgenital plates, styles and connective, ventral view; F–H: style, dorsal view; I: connective, dorsal view; J: aedeagus, dorsal view; K, L: connective and aedeagus, lateral view.