Russelliana disparilis Tuthill, 1964

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 : 28-29

publication ID	https://doi.org/ 10.5281/zenodo.575325
publication LSID	lsid:zoobank.org:pub:6202B24C-50CC-4EF1-A54E-8BAD122606DD
DOI	https://doi.org/10.5281/zenodo.6052177
persistent identifier	https://treatment.plazi.org/id/264F87F7-8B48-8740-4FC6-0C7BFE06FC89
treatment provided by	Plazi
scientific name	Russelliana disparilis Tuthill, 1964
status

Treatment

Russelliana disparilis Tuthill, 1964 View in CoL

( Figs 8 View FIGURE 8 O, 12G, 17F, 22F, 27C, 31E)

Russelliana disparilis Tuthill, 1964: 27 View in CoL .

Material examined. Additional material. Bolivia: 10 ♂, 9 ♀, 6 immatures, Department Chuquisaca, Province Nor Cinti, Padcoya to Camargo , 2800–3200 m, 26–28.xii.1984 (L. E. Peña) ( MHNG, dry, on slide) ; 2 ♂, 5 ♀, same but Lecori, S. Potosi, 3200 m, 26–27.xii.1984 (L. E. Peña) ( NHMB, dry, on slide).

Description. Coloration. Head including genal processes pale to bright yellow, genal processes often with dark tips, genae brown to black, vertex sometimes with yellow to brownish pattern; clypeus dark brown. Eyes yellow to brown, ocelli orange. Antenna yellow to brownish, segments 3–8 with brown apices, segments 9–10 entirely dark brown. Pronotum pale yellow, with brown spots on either side and yellow to brown spot in the middle; mesopraescutum pale yellow, with two orange patches along the fore margin and two orange to brown transverse stripes posteriorly; mesoscutum pale yellow, with four broad and, in the middle, one narrow, orange longitudinal stripes; mesoscutellum pale yellow along the margin, yellow to orange in the middle. Metanotum yellow to dark brown. Forewing with brown veins and colourless membrane, fumose in the middle of cells in apical half and with indistinct brown patch along vein Cu1b; sometimes brownish in apical part of cell cu2. Legs pale to dirty yellow, sometimes with slightly darker femora and distal tarsal segments, meracanthus of metacoxa yellow. Abdomen and terminalia dirty yellow to dark brown. Female proctiger dark in apical third, subgenital plate with dark apex. Females often slightly lighter with ventrally lighter abdomen.

Structure. Head, in profile, moderately to strongly inclined from longitudinal body axis (45–90°). Vertex subtrapezoidal with indented foveae, anteriorly produced into transverse tubercle on either side of mid-line, with raised hind margin around lateral ocelli, covered with short setae; genal processes conical, slender, subacute apically, shorter than vertex, covered with long setae. Pronotum with two lateral tubercles on either side, one relatively pronounced and the other relatively shallow. Forewing oval, broadly, evenly rounded apically; vein C+Sc weakly curved, pterostigma long, vein Rs sinuous, almost straight apically; vein M about as long as either of veins M1+2 and M3+4; surface spinules absent; radular spinules covering triangular areas along the margin of cells r2, m1, m2 and cu1. Metatibia with 8–9 apical spurs.

Terminalia. Male. Proctiger tubular; sparsely covered with moderately long setae in apical half. Subgenital plate short, subglobular; with sparsely spaced moderately long setae. Paramere irregularly subtrapezoidal; with long sickle-shaped apico-anterior process on short pedicel and long, bulged apico-posterior lobe, broadly rounded apically, with apically sclerotised median tooth; lobe distinctly longer than process; outer face sparsely covered with moderately long setae mostly in posterior part, inner face densely covered with relatively short setae apically and with long setae in basal half. Distal segment of aedeagus moderately elongate, weakly expanding towards apex; with blunt anterior process, one apical tubercle and one apico-posterior tubercle which is curved forward; lateral lobes long, dilated towards apex which is concave.—Female. Proctiger cuneate, pointed apically; dorsal margin, in profile, almost straight, slightly convex; sparsely covered with moderately long setae. Subgenital plate cuneate, with short apical process; sparsely covered with moderately long setae in apical half, dorsal margin with a row of bristles.

Host-plant. Dunalia sp. ( Solanaceae ).

Distribution. Reported from Peru (holotype ♂ from Cusco, 13.vi.1959, Dunalia sp. (USNM, dry), not examined here; Tuthill 1964) and Bolivia (Chuquisaca) ( Burckhardt 1987).

Comments. The female specimens from Argentina (2 ♀, Province La Rioja, Guandacol) assigned to R. disparilis in Syfert et al. (2017) belong to Russelliana didyma sp. nov. The female specimens from Chile (1 ♀, IV Region, Province Elqui, Panamericana km 550; 1 ♀, V Region, Province Petorca, La Viña to Alicahue) assigned to R. disparilis in Syfert et al. (2017) belong to Russelliana caunda sp. nov.

Russelliana disparilis resembles R. chorizanthis , nigra , rutila , similis and solanicola ; see comments under R. chorizanthis . R. disparilis differs from the five species in a strongly bulged apico-poterior lobe of the paramere, and a blunt anterior process of the distal segment of the aedaegus. It differs from R. chorizanthis , nigra , rutila and solanicola in the absence of surface spinules in the apical part of the forewing, from R. chorizanthis , rutila , similis and solanicola in the absence of a median hump of the paramere, and from R. nigra and rutila in a colourless forewing membrane.