Russelliana adunca Burckhardt 1987
Creators: name: Serbina, Liliya
name: Burckhardt, Daniel
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Psyllidae
Russelliana
Russelliana adunca

description: Russelliana adunca Burckhardt, 1987
(Figs 8 D, 11E, 16D, 21D, 26D, 30D)
Russelliana adunca Burckhardt, 1987: 384.
Russelliana sp. cf. adunca, Serbina et al. (2015): 38.
Material examined. Type material. Holotype ♂: Bolivia: Department Chuquisaca, Province Nor Cinti, Padcoya to Camargo, 2800–3200 m, 26–28.xii.1984 (L. E. Peña) (MHNG, dry). Paratype: Bolivia: 1 ♂, same but Lecori, S Potosi, 3200 m, 26–27.xii.1984 (L. E. Peña) (MHNG, on slide).
Additional material. Argentina: 181 ♂, 208 ♀, Province Chubut, Los Altares Valley, 3.x.1987 (L. E. Peña) (MHNG, NHMB, dry, 70 % ethanol); 115 ♂, 176 ♀, 1 immature, same but 3–5.xi.1990, Baccharis sp. (L. E. Peña) (NHMB, dry, on slide, 70 % ethanol); 5 ♂, 2 ♀, same but South Ameghino dam, 5.xi.1990 (L. E. Peña) (NHMB, 70 % ethanol).
Description. Coloration. Head including genal processes pale yellow to dark brown; clypeus brown to black. Eyes pale to dark brown, ocelli orange. Antenna yellow to brownish, sometimes segment 1 entirely brown and segment 2 brownish at base, segments 4–8 with dark brown apices, 9–10 entirely dark brown. Pronotum pale yellow with yellow spot in the middle, sometimes entirely black; mesopraescutum dirty yellow to orange, often with two pale to dark brown patches along the fore margin, sometimes with two pale to dark brown patches posteriorly; mesoscutum dirty yellow to orange, often with four broad, dark brown and, in the middle, one narrow, yellow to orange longitudinal stripes; mesoscutellum yellow to brown, often orange to brownish in the middle. Metanotum yellow to black. Forewing with bright yellow to dark brown veins and colourless to greyish membrane with indistinct yellow to distinct brownish patch along vein Cu1b, fumose in the middle of all cells and almost transparent along the veins. Legs pale to dirty yellow, sometimes femora and distal tarsal segments darker, meracanthus of metacoxa pale to dirty yellow. Abdomen and terminalia pale to dark brown.
Structure. Head, in profile, moderately to strongly inclined from longitudinal body axis (45–90°). Vertex subtrapezoidal with indented foveae, anteriorly slightly produced into transverse tubercle on either side of midline, with raised hind margin around lateral ocelli, covered with short setae; genal processes conical, slender, subacute apically, distinctly shorter than vertex, covered with long setae. Forewing oblong-oval, broadly, evenly rounded apically; vein C+Sc weakly curved, pterostigma long, vein Rs straight apically; vein M about as long as either of veins M1+2 and M3+4; surface spinules present in all cells, leaving broad spinule-free stripes along the veins, sparsely and irregularly spaced, sometimes spinules entirely reduced in apical half of the wing; radular spinules covering triangular areas along the margin of cells r2, m1, m2 and cu1. Metatibia with 7 apical spurs.
Terminalia. Male. Proctiger tubular; sparsely covered with moderately long setae. Subgenital plate short, subglobular; with densely spaced moderately long setae. Paramere irregularly subtrapezoidal; with long hookshaped apico-anterior process on pedicel, median hump slightly recurved with apically sclerotised tooth, and strongly bulged, curved inwards apico-posterior lobe; process, hump and lobe of subequal length; outer face densely covered with moderately long setae mostly in apical half, inner face densely covered with short setae in anterior part and with long setae in posterior and basal part. Distal segment of aedeagus moderately elongate, weakly expanding towards apex; with long, straight anterior process, one horn-shaped apical and one angular apico-posterior tubercles; lateral lobes long, strongly dilated towards apex which is concave.—Female. Proctiger cuneate, pointed apically; dorsal margin, in profile, weakly sinuous; densely covered with moderately long setae in apical half. Subgenital plate cuneate, with short apical process; densely covered with long setae, dorsal margin with a row of bristles.
Host-plant. Unknown. Numerous adults and a single immature were collected from Baccharis sp. (Asteraceae).
Distribution. Reported from Bolivia (Chuquisaca) (Burckhardt 1987) and as Russelliana sp. cf. adunca from Argentina (Chubut) (Serbina et al. 2015).
Comments. The paratype female specimens from Bolivia (Department Chuquisaca) previously assigned to Russelliana adunca (Burckhardt 1987; Serbina et al. 2015) belong to R. caunda sp. nov. Descriptions for female of R. adunca are given here for the first time.
Russelliana adunca resembles R. brevigenis, caunda and didyma in a colourless, slightly greyish forewing membrane without a pattern except for fumose areas in the middle of cells in the apical third of the wing and a brown patch along the vein Cu1b, in an irregularly subtrapezoidal paramere bearing a hook-shaped apico-anterior process on a long pedicel, a recurved median hump with a tooth, and an apico-posterior lobe, in a distal segment of the aedeagus bearing a long anterior process, two tubercles and large lateral lobes which are dilated towards their apices, and in a cuneate female proctiger and subgenital plate bearing a short apical process. R. adunca differs from R. caunda and didyma in shorter setae on the female terminalia, from R. brevigenis in long genal processes, and from R. didyma in a long apico-posterior lobe of the paramere with a strongly constricted base, a relatively straight anterior process of the distal segment of the aedeagus, and a relatively stout apex of the female proctiger.
description: Published as part of Serbina, Liliya & Burckhardt, Daniel, 2017, Systematics, biogeography and host-plant relationships of the Neotropical jumping plant-louse genus Russelliana (Hemiptera: Psylloidea), pp. 1-114 in Zootaxa 4266 (1) on pages 15-16, DOI: 10.5281/zenodo.575325