Russelliana sebastiani Burckhardt, 2008

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 : 49-51

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.6052226
persistent identifier	https://treatment.plazi.org/id/264F87F7-8B63-876E-4FC6-0C5AFAA0FD8C
treatment provided by	Plazi
scientific name	Russelliana sebastiani Burckhardt, 2008
status

Treatment

Russelliana sebastiani Burckhardt, 2008 View in CoL

( Figs 10 View FIGURE 10 E, 14J, 19H, 24H, 28K, 33F)

Russelliana sebastiani Burckhardt, 2008a: 82 View in CoL .

Material examined. Type material. Holotype ♂: Chile: VII Region, Province Talca , Parque Gil de Vilches , Monumento Natural , 35°35'S 71°04'W, 1100 m, 4–5.i.1994, Dipyrena juncea [ Diostea juncea ], mixed Nothofagus forest (D. Burckhardt) #47 ( MHNG, dry) GoogleMaps . Paratypes: Chile : 4 ♀, same as holotype but sector Piedras Blancas , 1350–1600 m, 12.i.1996, Dipyrena juncea [ Diostea juncea ] (D. Burckhardt) #43(4) ( MHNG, dry); 5 ♂, 6 ♀, 1 immature, same but sector Majadilla , 135 0–1550 m, 13.i.1996, Dipyrena juncea [ Diostea juncea ], deciduous and evergreen Nothofagus forests (D. Burckhardt) #44(12) ( MHNG, NHMB, dry, on slide) ; 2 ♂, 2 ♀, same but sendero El Enladrillado, El Venado Valley , 1350–1700 m, 14.i.1996, Dipyrena juncea [ Diostea juncea ], mixed Nothofagus forest (D. Burckhardt) #45(1) ( MHNG, dry) ; 3 ♂, 3 ♀, VIII Region, Province Bío-Bío, Parque Nacional Laguna del Laja , sector Chacay , 1200 m, 19.i.1996, Dipyrena juncea [ Diostea juncea ], Austrocedrus forest and open sclerophyll scrub (D. Burckhardt) #53(3) ( MHNG, NHMB, dry).

Description. Coloration. Head pale yellow to brown, genal processes whitish ventrally; clypeus black. Eyes grey to dark brown, ocelli orange. Antenna pale yellow, segments 1–2 orange, segments 3–8 with dark brown apices, segments 9–10 entirely black. Pronotum of the same colour as vertex, brown on either side; mesopraescutum pale yellow, with two orange to brown patches along the fore margin; mesoscutum pale yellow, with four broad orange to brown longitudinal stripes; mesoscutellum pale yellow along the margin, brownish in the middle. Metanotum yellow to dark brown. Forewing with white to dark brown veins and yellowish fore margin gradually turning white in the middle of wing where the dark brown pattern starts; the dark pattern is interrupted by white median transverse stripe stretching from median part of vein Rs to bifurcation of vein Cu, and by light areas in cells r2, m1, m2 and cu1 along the margin. Legs dirty yellow to brownish, with darker femora, meracanthus of metacoxa bright yellow. Abdomen dark brown to black dorsally, yellow to orange ventrally. Male terminalia pale brown, paramere dark brown. Female proctiger brown, with dark apex; subgenital plate orange.

Structure. Head, in profile, strongly inclined from longitudinal body axis (> 45°). Vertex subtrapezoidal, flat with indented foveae, anteriorly produced into transverse lobe on either side of mid-line, hind margin around lateral ocelli not raised, covered with microscopical setae; genal processes short, swollen, with blunt apices, covered with long setae. Pronotum bearing two produced lateral tubercles on either side. Forewing oblong-oval, narrowly, unevenly rounded apically; vein C+Sc strongly, unevenly curved, pterostigma short, vein Rs weakly sinuous, almost straight apically; vein M shorter than either of veins M1+2 and M3+4; surface spinules very dense, present in all cells, leaving no spinule-free stripes along the veins, forming hexagonal pattern, absent in upper part of cell r1 and along the fore margin of cell c+sc, less developed on unpigmented areas; radular spinules weakly pronounced. Metatibia with 6 apical spurs.

Terminalia. Male. Proctiger tubular; densely covered with moderately long setae. Subgenital plate elongate; with sparsely spaced long setae. Paramere narrowly lamellar; with slightly recurved apico-anterior process on pedicel and long finger-shaped apico-posterior lobe with sclerotised anterior tooth situated at base of the lobe and directed inwards; lobe more than twice longer than process; outer face sparsely covered with moderately long setae mostly in apical half, inner face sparsely covered with short setae and with long thick setae along anterior margin of the lobe. Distal segment of aedeagus moderately elongate, broadly, unevenly expanding towards apex; with one small apico-posterior tubercle; lateral lobes moderately long, dilated towards apex which is slightly concave and with frayed margin.—Female. Proctiger subglobular, subacute apically; dorsal margin, in profile, convex, bent downwards; relatively densely covered with moderately long setae in apical half. Subgenital plate subglobular, rounded apically; sparsely covered with short setae.

Host-plant. Dipyrena juncea (Gillies & Hook.) Ravenna (Verbenaceae) .

Distribution. Reported from Chile (VII–VIII Regions) ( Burckhardt 2008a).

Comments. Russelliana sebastiani resembles R. bulbosa and diosteae ; see comments under R. bulbosa . R. sebastiani differs from the two species in shorter swollen genal processes, a narrow forewing which is narrowly, unevenly rounded apically with a longer cell m1, a paramere bearing a slightly recurved apico-anterior process and a narrow apico-posterior lobe, and a distal segment of the aedeagus which is weakly inflated anteriorly and bears a small apico-posterior tubercle. It differs from R. bulbosa in a longer antenna, a forewing with a brown pattern and a shorter pterostigma, a paramere bearing a process distinctly shorter than a lobe, an apically rounded female subgenital plate lacking an apical process. From R. diosteae it differs in a more extensive forewing pattern in its basal third.

Russelliana setosa sp. nov.

( Figs 10 View FIGURE 10 F, 15A, 19I, 24I, 28L, 33G)

Material examined. Holotype ♂: Argentina: Province Mendoza , above Villa Vicencia , 50 km NW Mendoza, 1800 –2200 m, 18.i.1997, Adesmia sp., low scrub (D. Burckhardt) #15(3) ( MHNG, dry).

Paratypes: Argentina: 11 ♂, 15 ♀, 5 immatures, same as holotype (D. Burckhardt) #15(3) ( MHNG, dry, on slide, 70 % ethanol).

Description. Coloration. Head yellow to brownish, genal processes pale yellow; clypeus brown. Eyes yellow to grey, ocelli orange. Antenna yellow to brownish, segments 3–8 with dark brown apices, segments 9–10 entirely dark brown. Thorax pale yellow to brownish. Forewing with bright yellow to brown veins and semitransparent, yellowish membrane with brown pattern consisting of large patch along vein Cu1b and scattered dots varying in size and number, mainly in apical two thirds of the wing. Legs yellow with darker distal tarsal segments, meracanthus of metacoxa pale yellow. Abdomen and terminalia yellow to brownish, lighter ventrally.

Structure. Head, in profile, moderately to strongly inclined from longitudinal body axis (45–90°). Vertex subtrapezoidal with indented foveae, anteriorly produced into transverse lobe on either side of mid-line, with raised hind margin around lateral ocelli, covered with short setae; genal processes conical, slender, subacute apically, distinctly shorter than vertex, covered with short setae. Pronotum with one pronounced lateral tubercle on either side. Forewing oval, broadly, evenly rounded apically; vein C+Sc weakly curved, pterostigma long, vein Rs weakly 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 6–7 apical spurs.

Terminalia. Male. Proctiger tubular; sparsely covered with moderately long setae. Subgenital plate elongate; with sparsely spaced moderately long setae. Paramere relatively narrow, lamellar; with apico-anterior process on very short pedicel and median hump with apically sclerotised tooth; apical part of posterior edge produced into small lobe; outer face sparsely covered with moderately long setae, inner face covered with few moderately long setae. Distal segment of aedeagus moderately elongate, weakly expanding towards apex; with long anterior process and two small apico-posterior tubercles; lateral lobes moderately long, dilated towards apex which is concave.— Female. Terminalia densely covered with long setae. Proctiger cuneate, pointed apically; dorsal margin, in profile, strongly convex. Subgenital plate cuneate, with long apical process.

Host-plant. Adesmia sp. ( Fabaceae ).

Distribution. Argentina ( Mendoza ).

Derivation of name. From Latin setosus = hairy, referring to the female terminalia which are densely covered with long hairs.

Comments. Russelliana setosa resembles R. mendozae , monticola and vinculipennis , see comments under R. mendozae . R. setosa differs from the three species in denser and longer setae on the female terminalia, from R. mendozae and monticola in a more extensive pattern mainly in the apical two thirds of the forewing membrane, and from R. mendozae and vinculipennis in the presence of a median hump of the paramere. It differs from R. vinculipennis in the absence of surface spinules in the apical part of the forewing membrane, a longer anterior process of the distal segment of the aedeagus, and a longer apical process of the female subgenital plate.