Russelliana diosteae 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 : 27-28

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.6052171
persistent identifier	https://treatment.plazi.org/id/264F87F7-8B49-8747-4FC6-0CB1FA05FD42
treatment provided by	Plazi
scientific name	Russelliana diosteae Burckhardt, 2008
status

Treatment

Russelliana diosteae Burckhardt, 2008 View in CoL

( Figs 8 View FIGURE 8 N, 12F, 17E, 22E, 27B, 31D)

Russelliana diosteae Burckhardt, 2008a: 80 View in CoL .

Material examined. Type material. Holotype ♂: Chile: VII Region, Province Talca, Parque Gil de Vilches, sendero El Enladrillado, El Venado Valley, 1350–1700 m, 14.i.1996, Dipyrena juncea [ Diostea juncea ] (D. Burckhardt) #45(1) ( MHNG, on slide) . Paratype: Chile: 1 ♀, same as holotype (D. Burckhardt) #45(1) ( MHNG, on slide).

Description. Coloration. Head yellowish to greyish, ventrally whitish, genal processes white, black at base, vertex with two dark dots on either side of mid-line; clypeus dark brown. Antenna ochreous with tips of segments 4–7 brown getting darker towards apex, segments 8–10 entirely dark brown to black. Pronotom with four dark dots; mesopraescutum orange anteriorly; mesoscutum with brown longitudinal stripes; mesoscutellum with dark dot in the middle. Metanotum dark brown. Forewing with yellow veins and colourless membrane with brown pattern, consisting of patch along vein Cu1b and two well-defined oblique stripes: submarginal one stretching from apical part of costal vein to base of vein Cu1a leaving light areas in cells r2, m1 and m2 along the margin, and median one stretching from apical part of cell r1 to median part of anal vein. Legs with femora and distal tarsal segments dark brown, tibiae and basal tarsal segments ochreous. Abdomen dark brown. Female with slightly lighter vertex and thoracic dorsum.

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 conical, slender, subacute apically, distinctly shorter than vertex, covered with long setae. Pronotum bearing two pronounced lateral tubercles on either side. Forewing oblong-oval, broadly, unevenly rounded apically; veins bearing short microscopical setae; vein C+Sc strongly, unevenly curved, pterostigma short, vein Rs almost straight apically; vein M longer than either of veins M1+2 and M3+4; surface spinules present in all cells, leaving no spinule-free stripes along the veins, densely spaced and forming irregular, indistinct hexagons in apical half, very sparse on unpigmented areas; absent at base of cell c+sc; radular spinules weakly pronounced. Metatibia with 5–6 apical spurs.

Terminalia. Male. Proctiger tubular; sparsely covered with moderately long setae. Subgenital plate elongate; with sparsely spaced moderately long setae. Paramere narrowly lamellar; with thumb-like apico-anterior process on pedicel and long apico-posterior lobe, irregularly rounded apically, with inwards directed sclerotised anterior tooth situated at base of the lobe; lobe distinctly longer than process; outer face densely covered with moderately long setae in apical half, inner face relatively densely covered with moderately long setae and with long thick bristles apically and in basal third. Distal segment of aedeagus massive, broadly, unevenly expanding towards apex, inflated anteriorly; with one horn-shaped apico-posterior tubercle; lateral lobes moderately long, with frayed apical margin.—Female. Proctiger subglobular, subacute apically; dorsal margin, in profile, convex, bent downwards; densely covered with short setae in apical part and with moderately long setae. Subgenital plate subglobular, rounded apically; densely covered with moderately long setae in ventral part.

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

Distribution. Reported from Chile (VII Region) ( Burckhardt 2008a).

Comments. Russelliana diosteae resembles R. bulbosa and sebastiani ; see comments under R. bulbosa . R. diosteae differs from the two species in a forewing which is broadly, unevenly rounded apically, and a distal segment of the aedeagus bearing a horn-shaped apico-posterior tubercle. R. diosteae differs from R. bulbosa in a longer antenna, a forewing with a brown pattern, a shorter pterostigma, a paramere bearing an apico-anterior process distinctly shorter than an apico-posterior lobe, and a female subgenital plate rounded apically and lacking an apical process. It differs from R. sebastiani in slender longer genal processes, a broad forewing with a different, less extensive brown pattern in its basal third and a shorter cell m1, a paramere bearing a thumb-like apico-anterior process and a broad apico-posterior lobe, and a distal segment of the aedeagus being strongly inflated anteriorly.