Russelliana chorizanthis Serbina & Burckhardt, 2017, sp. nov.
Creators: name: Serbina, Liliya
name: Burckhardt, Daniel
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Psyllidae
Russelliana
Russelliana chorizanthis

description: Russelliana chorizanthis sp. nov.
(Figs 8 K, 12B, 17B, 22B, 26K, 31A)
Material examined. Holotype ♂: Chile: V Region, Province San Felipe de Aconcagua, Putaendo, 8 km N San Felipe, 700 m, 12–13.i.1997, Chorizanthe sp., dry river bed of Río Aconcagua, quebrada vegetation (D. Burckhardt) #4(2) (NHMB, dry).
Paratypes: Chile: 4 ♂, 14 ♀, 1?, V Region, Province San Felipe de Aconcagua, Putaendo, 10 km N San Felipe, 700 m, 15.xii.1995, river bed, quebrada vegetation (D. Burckhardt) #1 (BMNH, MHNG, NHMB, dry); 16 ♂, 28 ♀, 9 immatures, 1?, same but 27.xii.1995, Chorizanthe sp. (D. Burckhardt) #27(3) (MHNG, NHMB, dry, on slide, 70 % ethanol); 1 ♂, 6 ♀, 1 immature, same as holotype (D. Burckhardt) #4(2) (NHMB, dry); 2 ♂, 3 ♀, same but El Asiento, 10 km NW San Felipe, 900 m, 13–20.i.1997, Chorizanthe sp., mediterranean scrub (D. Burckhardt) #54 (MHNG, 70 % ethanol).
Description. Coloration. Head including genal processes pale yellow to orange; clypeus orange to brown. Eyes yellow to brown, ocelli red. Antenna yellow to brownish, segments 4–8 with dark brown apices, sometimes segment 8 entirely brown, segments 9–10 entirely dark brown. Pronotum pale yellow to orange, sometimes orange in the middle; mesopraescutum pale yellow to orange, often with two dark orange patches along the fore margin and sometimes with two pale orange patches posteriorly; mesoscutum pale yellow with four broad orange longitudinal stripes; mesoscutellum pale yellow along the margin, yellow to orange in the middle. Metanotum yellow to orange. Forewing with whitish to pale yellow veins, gradually becoming brown towards apical part, and whitish membrane with indistinct pale brown patch along vein Cu1b, sometimes yellowish in apical part and slightly brownish at apices of veins Rs, M1+2, M3+4 and Cu1a. Legs yellow to orange, distal tarsal segments darker, meracanthus of metacoxa pale yellow to orange. Abdomen and terminalia orange to brown, sometimes entirely yellow. Female terminalia darker in apical third.
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 slightly raised hind margin around lateral ocelli, covered with short setae; genal processes, conical, slender, subacute or slightly blunt apically, distinctly shorter than vertex, covered with short setae. Forewing oblong-oval, narrowly rounded apically; vein C+Sc weakly curved, pterostigma long, vein Rs almost straight apically; vein M about as long as either of veins M1+2 and M3+4; surface spinules very faint, present in all cells, leaving no spinule-free stripes along the veins, densely and irregularly spaced; radular spinules covering triangular areas along the margin of cells r2, m1, m2 and cu1. Metatibia with 5–7 apical spurs.
Terminalia. Male. Proctiger tubular; sparsely covered with moderately long setae in apical two thirds. Subgenital plate short, subglobular; with sparsely spaced moderately long setae restricted to median part. Paramere broadly lamellar, slightly curved with median convexity apically; with short apico-anterior process on pedicel, apically sclerotised median tooth and posteriorly concave lobe; outer face sparsely covered with moderately long setae, inner face densely, evenly covered with moderately long setae. Distal segment of aedeagus elongate, weakly expanding towards apex; with long anterior process, one apical and one apico-posterior tubercles; lateral lobes moderately long, dilated towards apex which is concave.—Female. Proctiger cuneate, relatively blunt or subacute apically; dorsal margin, in profile, slightly curved, with subapical indentation; densely covered with short setae in apical half. Subgenital plate cuneate, with moderately long apical process; sparsely covered with moderately long setae, dorsal margin with a bristle.
Host-plant. Chorizanthe sp. (Polygonaceae).
Distribution. Chile (V Region).
Derivation of name. Named after its host-plant Chorizanthe.
Comments. Russelliana chorizanthis resembles R. disparilis, nigra, rutila, similis and solanicola, in a irregularly subtrapezoidal paramere bearing an apico-anterior process on a pedicel and a median tooth, in a distal segment of the aedeagus bearing an anterior process, two tubercles and long lateral lobes dilated towards apex, in a cuneate female proctiger and cuneate subgenital plate bearing a short apical process. R. chorizanthis differs from the five species in an elongate female terminalia. It differs from R. disparilis and nigra in the presence of a median convexity of the apical margin of the paramere, from R. disparilis and similis in the presence of surface spinules in the apical part of the forewing membrane, from R. nigra and rutila in a colourless forewing membrane, and from R. disparilis in an apically subacute anterior process of the distal segment of the aedaegus.
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 page 24, DOI: 10.5281/zenodo.575325