Russelliana chilensis Burckhardt, 1987

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 : 22-23

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.6052151
persistent identifier	https://treatment.plazi.org/id/264F87F7-8B46-874A-4FC6-09D1FCA7F8CD
treatment provided by	Plazi
scientific name	Russelliana chilensis Burckhardt, 1987
status

Treatment

Russelliana chilensis Burckhardt, 1987 View in CoL

( Figs 8 View FIGURE 8 J, 12A, 17A, 22A, 26J, 30J)

Russelliana chilensis Burckhardt, 1987: 372 View in CoL .

Material examined. Type material. Holotype ♂: Chile: VIII Region , Province Ñuble, Las Trancas, 1 550 m, 12– 13.xii.1983 (L. E. Peña) ( MHNG, dry) . Paratype: Chile: 1 ♂, same as holotype (L. E. Peña) ( MHNG, dry, on slide).

Additional material. Chile: 1 ♀, same as holotype but Refugio Las Cabras , 1560 m, 16.ii.1967 (E. I. Schlinger) ( CASC, dry) ; 9 ♂, 9 ♀, IX Region, Province Cautín , Parque Nacional Conguillío, North entrance, 1100 m, 30.i.1996, Adesmia sp., Nothofagus dombeyi / Araucaria forest and open patches with lava flows (D. Burckhardt) #64(2) ( MHNG, NHMB, dry, 70 % ethanol) ; 7 ♂, 9 ♀, 1?, same but Province Malleco , Malalcahuello, Las Nalcas, 8.iii.1989 (T. Cekalovic) ( MHNG, NHMB, dry) ; 67 ♂, 184 ♀, same but S Valle, Lonquimay , Curacautín, 1800 m, 29–30.i.1991 (L. E. Peña) ( BMNH, NHMB, dry, on slide, 70 % ethanol).

Description. Coloration. Head including genal processes brown to dark brown, vertex pale yellow with variable orange to dark brown pattern; clypeus dark brown. Eyes yellow to brown, ocelli red. Antenna yellow, segments 1, 8–10 entirely dark brown, segment 2 brownish at base, segment 3 entirely yellow, segments 4–7 with brown apices, segment 6 only a little darker apically. Pronotum pale yellow with orange to brown patch in the middle, sometimes entirely dark brown; mesopraescutum pale yellow with two orange to brown 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 to brown longitudinal stripes; mesoscutellum pale yellow along the margin, brown in the middle. Metanotum orange to brown. Forewing with yellow to brown veins and yellowish membrane with variable brown pattern consisting of broad stripe parallel to apical margin stretching from apical part of costal vein to apex of vein Cu1a, leaving light areas in cells r2, m1 and m2 along the margin, and patches at bifurcation of veins R and M+Cu, in apical part of cell r2 and along vein Cu1b, sometimes forming stripe in the middle of wing stretching from apical part of cell r1 to vein Cu1b; sometimes with patches in cells c+sc and cu2. Legs yellow to brownish with darker femora and distal tarsal segments, meracanthus of metacoxa yellow to orange. Abdomen and terminalia brown to black.

Structure. Head, in profile, moderately to strongly inclined from longitudinal axis of body (45–90°). Vertex subtrapezoidal, anteriorly produced into transverse tubercle on either side of mid-line, with raised hind margin around lateral ocelli, covered with microscopical setae; genal processes conical, slender, subacute apically, shorter than vertex, covered with moderately long setae. Pronotum with two pronounced lateral tubercles on either side. Thorax strongly arched dorsally. Forewing oblong-oval, broadly, unevenly rounded apically; vein C+Sc hardly curved, pterostigma long, vein Rs straight apically; vein M slightly longer than either of veins M1+2 and M3+4; surface spinules relatively large, dense, present in all cells, leaving no spinule-free stripes along the veins, forming hexagonal pattern; absent at base of cell c+sc; radular spinules not pronounced. Metatibia with 7 apical spurs.

Terminalia. Male. Proctiger tubular; densely covered with moderately long setae. Subgenital plate short, subglobular; with densely spaced moderately long setae. Paramere broadly lamellar; with short apico-anterior process lacking pedicel, median hump with apically sclerotised median tooth, and apico-posterior lobe distinctly bulged posteriorly; process and hump of subequal length, distinctly longer than lobe; outer face sparsely covered with moderately long setae mostly in posterior part, inner face densely covered with moderately long setae. Distal segment of aedeagus elongate, weakly expanding towards apex; with long anterior process and two small apicoposterior tubercles; lateral lobes long, dilated towards apex which is concave.—Female. Proctiger cuneate, pointed apically; dorsal margin, in profile, almost straight; densely covered with moderately long setae in apical half. Subgenital plate cuneate, with moderately long apical process; densely covered with moderately long setae in apical part, dorsal margin with few bristles.

Host-plant. Adults were collected on Adesmia sp. ( Fabaceae ) which is a likely host.

Distribution. Reported from Chile (VIII Region) ( Burckhardt 1987). Material examined. Chile (VIII–IX Regions).

Comments. Description for the female is given for the first time.

Russelliana chilensis resembles R. magellanica in a forewing membrane with a brown pattern, in a broadly lamellar paramere bearing a short apico-anterior process lacking a pedicel, a small median hump and an apicoposterior lobe, in a distal segment of the aedeagus bearing a long anterior process, two apico-posterior tubercles and long lateral lobes dilated towards apex, and in a cuneate female proctiger and cuneate subgenital plate bearing a short apical process. R. chilensis differs from R. magellanica in a shape of the forewing which is broadest in the apical third, a less extensive pattern which is mostly restricted to the apical part of the wing, and an apico-posterior lobe of the paramere which is strongly bulged posteriorly.