Russelliana adelpha, Serbina, Liliya & Burckhardt, Daniel, 2017

Serbina, Liliya & Burckhardt, Daniel, 2017, Systematics, biogeography and host-plant relationships of the Neotropical jumping plant-louse genus Russelliana (Hemiptera: Psylloidea), Zootaxa 4266 (1), pp. 1-114 : 12-13

Russelliana adelpha sp. nov.

( Figs 8 B, 11B, C, 16B, 21B, 26B, 30B)

Material examined. Holotype ♂: Chile: IV Region, Province Elqui, 5–10 km S Vicuña, 30°05'S 70°40'W, 750– 950 m, 5.xii.1993,? Lycium sp., semidesert (D. Burckhardt) #11 ( MHNG, dry).

Paratypes: Chile: 3 ♂, 1 immature, III Region , Province Huasco, 20 km S Vallenar, 28°40'S 70°40'W, 750 m, 6.xii.1993, Lycium sp., quebrada (D. Burckhardt) #15 ( MHNG, dry) ; 9 ♂, 13 ♀, 2 immatures, 1?, IV Region, Province Elqui , along road from Viñita Baja to Condoriaco, 29°45'S 70°50'W, 1000–1400 m, 4.xii.1993,? Lycium sp., dry slope with Trichocereus and various shrubs (D. Burckhardt) #7 ( BMNH, MHNG, NHMB, dry, on slide) ; 7 ♂, 4 ♀, same as holotype (D. Burckhardt) #11 (MHNG, dry); 2 ♂, 3 ♀, same but 15 km E Vicuña , 30°10'S 70°40'W, 850 m, Solanaceae , river bed with Baccharis and dry slope with small shrubs (D. Burckhardt) #10 ( MHNG, dry) ; 3 ♂, 2 ♀, 1 immature, same but 15–25 km S Vicuña , 30°15'S 70°40'W, 1300–1700 m, 14.xii.1993, Lycium sp., steppe (D. Burckhardt) #33 ( NHMB, dry) ; 1 ♀, same but 10 km S Vicuña towards Hurtado , 900 m, 18.xii.1995, Lycium sp., semidesert with a few scattered Prosopis chilensis trees in quebrada (D. Burckhardt) #7(1) ( MHNG, dry) ; 1 ♀, same but ca 45 km ENE La Serena, Viñita Baja to Condoriaco, 800–1000 m, 19.xii.1995, Lycium sp., quebrada and mountain slope (D. Burckhardt) #10(3) ( MHNG, dry).

Description. Coloration. Dimorphic, male slightly darker, general body colour yellow to dark brown; female slightly lighter, general body colour yellow to brown, forewing pattern paler than in males. Head including genal processes yellow to dark brown with yellow to brownish dots, sometimes entirely yellow; clypeus yellow to dark brown. Eyes yellow to brown, ocelli orange to red. Antenna yellow, segments 1–2 brownish at base to entirely brown, segments 3–8 with dark brown apices, segments 9–10 entirely dark brown. Thorax brown with distinct yellow spots. Pronotum yellow to dark brown; mesopraescutum pale to dark brown, sometimes with two orange patches along the fore margin; mesoscutum pale to dark brown with four broad dark orange longitudinal stripes; mesoscutellum pale to dark brown, sometimes pale yellow along the margin. Metanotum yellow to brown. Forewing with yellow to dark brown veins and membrane with distinct pale to dark brown pattern differing in males and females. Male forewing membrane brown to dark brown consisting of large brown band occupying almost entire wing surface stretching from apical part of costal vein and covering apical part of cell r1, apical and basal part of cell r2, entire cells m1, m2 and cu1, apical part of cell cu2 and median part of cell c+sc, leaving light areas in cells r2, m1, m2 and cu1 along the margin; membrane lacking pattern, colourless to yellowish. Female forewing membrane pale brown consisting of patches scattered over entire surface and dark frequently confluent dots occupying all cells, patch along the margin leaving almost indistinct light areas in cells r2, m1, m2 and cu1; with few distinct dark brown dots along the margin at the edges of the light areas in cells r2, m1, m2 and cu1. Legs yellow to brownish with orange to dark brown femora, meracanthus of metacoxa pale to bright yellow. Abdomen with terminalia yellow to brownish, sometimes lighter ventrally. Male proctiger and paramere often dark apically. Female terminalia with dark apex.

Structure. Head, in profile, weakly inclined from longitudinal body axis (<45°). Vertex trapezoidal, flat with indented foveae, anteriorly produced into transverse lobe on either side of mid-line, with slightly raised hind margin around lateral ocelli, covered with short setae; genal processes short, swollen, slightly conical apically, covered with moderately long setae. Pronotum with two pronounced lateral and one relatively shallow sublateral tubercles on either side. Forewing rhomboidal; vein C+Sc strongly, unevenly curved, pterostigma long, vein Rs almost straight, strongly curved to fore margin apically; vein M longer than either of veins M1+2 and M3+4; both male and female forewing with large, very dense surface spinules, present in all cells, leaving no spinule-free stripes along the veins, forming hexagons in apical part on pigmented areas, weakly developed on unpigmented areas; radular spinules not pronounced. Metatibia with 5–6 apical spurs.

Terminalia. Male. Proctiger barrel-shaped; sparsely covered with moderately long setae in apical two thirds. Subgenital plate elongate; with sparsely spaced long setae restricted to apical half. Paramere shortly lamellar; with long recurved apico-anterior process on pedicel, broadly rounded apico-posterior lobe with apically sclerotised median tooth; lobe situated exterior to process; both process and lobe of subequal length; outer face densely covered with long setae mostly in apical half, inner face covered with long thick bristles anteriorly and apically. Distal segment of aedeagus massive, broadly, unevenly expanding towards apex, strongly bulged anteriorly; lateral lobes moderately long, dilated towards apex which is rounded and with frayed margin.—Female. Proctiger cuneate, pointed apically; dorsal margin, in profile, slightly convex; densely covered with long setae. Subgenital plate subglobular, with tiny apical process; densely covered with moderately long setae in apical part and with long setae along ventral margin, dorsal margin with a row of bristles.

Host-plant. Lycium sp. ( Solanaceae ).

Distribution. Chile (III–IV Regions).

Derivation of name. From Greek αδελφος = brotherly, similar, for its close resemblance to R. nolanae .

Comments. Russelliana adelpha resembles R. globosa and nolanae in a weakly inclined head (<45°), in short swollen genal processes, in a rhomboidal forewing with a brown pattern, a strongly curved vein C+Sc and a strongly curved vein Rs to fore margin apically, in a barrel-shaped male proctiger, in a cuneate male subgenital plate, in a shortly lamellar paramere bearing a recurved apico-anterior process and an apically rounded, strongly bulged apico-posterior lobe with a tooth, in a form of the distal segment of the aedeagus which is strongly inflated anteriorly, bearing lateral lobes and with a frayed margin apically, in a female subgenital plate, densely covered with long setae and in the presence of sexual dimorphism. R. adelpha differs from R. globosa and nolanae in a more extensive pattern on the male forewing membrane, and from R. globosa in a short distal segment of the aedeagus which is rounded apically and bearing lateral lobes dilated towards their apices, a cuneate female proctiger and subgenital plate bearing an apical process.

Figures

FIGURE 8. Russelliana spp., head, dorsal view. A, R. adela sp. nov.; B, R. adelpha sp. nov.; C, R. adesmiae Burckhardt; D, R. adunca Burckhardt; E, R. bicolorata sp. nov.; F, R. brevigenis sp. nov.; G, R. bulbosa Burckhardt; H, R. capsici Burckhardt; I, R. caunda sp. nov.; J, R. chilensis Burckhardt; K, R. chorizanthis sp. nov.; L, R. didyma sp. nov.; M, R. dimorpha sp. nov.; N, R. diosteae Burckhardt; O, R. disparilis Tuthill.