Xiqilliba Kramer 1964
Creators: name: Ale-Rocha, Rosaly
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Xiqilliba

description: Xiqilliba Kramer, 1964
Xiqilliba Kramer, 1964: 261, 268 (key, description); 1967: 39 (key to genera), 46 (citation, synonymy); Oman et al., 1990: 260, 367 (catalogue); McKamey, 2002: 376 (citation); Marques-Costa & Cavichioli, 2012: 5, 12, 14–16, 20, 22 (uncertain distribution, illustrations, cladistic analysis of Neocoelidiinae); Gonçalves, Marques-Costa & Ale-Rocha, 2013: 274 (notes, comparison to Tozzita).
Xigilliba [sic]; Freytag & Sharkey, 2002: 255 (citation, number of species).
Xiquilliba [sic]; Dietrich, 2003: 701 (distribution).
Type species: Xiqilliba bellator Kramer, 1964, by original designation.
Total length. 5–7 mm.
Diagnosis. Crown, pronotum, mesonotum and forewing with large brown to black symmetrical markings and apex of head with rounded spot of the same color (Figs 1–5, 13 – 16, 25 – 28); with thin transverse carina between crown and frons; anterior margin of crown slightly angulate to rounded (Figs 1–2, 4, 13,15); ocelli on crown, close to anterior margin (Figs 2–4, 13,15); clypeus with parallel lateral margins (Figs 3, 14), in lateral view slightly swollen (Figs 4, 15). Posterior margin of pronotum emarginated, V-shaped (Figs 1 – 2, 13); venation of forewing slightly conspicuous, with two anteapical and three apical cells (Figs 5, 16); hind wing with R4+5 and M1+2 preapically convergent and fused at apex. Male genitalia: pygofer without processes or macrosetae, with apical or preapical bristly lobes (Figs 6–7, 17–18). Subgenital valve entirely fused to subgenital plates. Subgenital plates without macrosetae, fused in basal half (Figs 8, 19). Style extremely long and thin, without preapical lobe (Figs 9– 10, 20–21). Connective Y-shaped and articulated with aedeagus (Figs 10, 21). Aedeagus with or without paired apical processes (Figs 11–12, 22–24). Anal tube with paired basal processes, with apices curved inside (Figs 6–7, 17–18).
Description. Crown, pronotum, mesonotum and forewing with large brown to black markings; apex of the head with rounded spot of the same color (Figs 25 – 28). Crown almost rectangular, slightly projected anteriorly, wider than long; median length of crown approximately two thirds of interocular width and one third of transocular width; anterior margin slightly angulated to rounded, with thin transverse carina at transition between crown and frons; lateral margins adjacent to compound eyes elevated (not at same level of dorsum of compound eyes) but not carinate; surface flat and smooth, with distinct coronal maculae; coronal suture usually indistinct, if present, restricted to basal half of crown. Ocelli small, on the crown close to anterior margin, closer to compound eyes than to midline (Figs 2–4, 13, 15). Antennal ledges, oblique and carinate in lateral view; antennal pit at same level of anteroventral angles of compound eyes; antennal flagellum long, extended beyond basal half of forewings. Frons length approximately 1.5–2 times of basal width, profile convex, not swollen on central portion of base and not carinate; muscle impressions indistinct; frontogenal sutures not reaching ocelli (Figs 3, 14). Apical margin of maxillae approximately even with apex of clypeus; lorum approximately half-moon shaped, inferior margin not reaching apical margin of clypeus; gena partially concealing proepisternum, only apex visible in anterior view; epistomal suture straight, distinct and complete; clypeus approximately rectangular, with parallel lateral margins (Figs 3, 14), in lateral view with slight gibbosity (Figs 4, 15).
Thorax. Pronotum wider than head, width between humeri approximately
four fifths of transocular width; median length of pronotum one third of width between humeri; posterior margin emarginated, V-shaped (Figs 1–2, 13); dorsal surface smooth, without transverse grooves; dorsopleural carina complete and evident; mesothorax moderately swollen in ventral view; mesonotum smooth, as long as maximum width, with distinct preapical fold (Figs 1–2, 13). Forewing about 3.5 to 4 times longer than greatest width; without punctuations, semi-hyaline; venation slightly conspicuous, with three apical cells, all approximately subtriangular; third apical cell more distal if compared to second apical cell; two anteapical cells, both open; appendix narrow, extending along first, through second or third apical cells (Figs 5,16). Hind wing with three apical cells, R4+5 and M1+2 convergent preapically, fused at apex. Hind leg: femoral formula 2+2+1. Tibial anterodorsal row with long and robust setae, with two or more small intercalary setae between successive macrosetae. Posterodorsal row with long and robust setae evenly distributed throughout length of tibia, intercalary setae absent. Anteroventral row with short, robust and little separated setae, distributed only on middle and apical thirds of tibia, intercalary setae absent. Posteroventral row densely bristly, with short setae at base, becoming progressively longer toward apex, distributed throughout length of tibia, intercalary setae absent. Male genitalia: pygofer without processes or macrosetae, approximately rectangular strongly narrowed or not at apical third; with bristly apical or preapical lobe (Figs 6–7, 17–18). Valve entirely fused to subgenital plates and articulated to pygofer. Subgenital plates fused in basal half, longer than pygofer, without macrosetae, and in lateral view without apical tooth (Figs 8, 19). Style very long and slender, about four times connective length, without preapical lobe, lateral inner margin with serrate aspect or not, with or without strong basal curve, apical fourth not curved ventrally, setae at apical third present or absent (Figs 9–10, 20–21). Connective Y-shaped, articulated to base of aedeagus, and not bifurcated at articulation point (Figs 10, 21). Aedeagus with or without paired apical processes and with apical gonopore (Figs 11–12, 22–24). Anal tube membranous to slightly sclerotized, with basal pair of processes, with apices curved inside (Figs 6–7, 17–18).
Notes. The genus can be easily differentiated by the large brown to black symmetrical markings on the crown, pronotum, mesonotum and forwings (Figs 1–5, 13–16, 25–28). The only other genus with similar coloration is Tozzita Kramer, but the markings are darker in Xiqilliba. The following characters distinguish this genus from other Neocoelidiinae: (1) small dark-brown to black rounded spot on head apex (Figs 3, 14); (2) distinct venation of the forewing (Figs 5, 16); (3) forewing with two anteapical cells (Figs 5, 16); (4) forewing with three apical cells (Figs 5, 16); (5) pygofer without external process on ventral margin (Figs 6–7, 17–18); and (6) connective about one fourth length of style (Figs 10, 21).
description: Published as part of Ale-Rocha, Rosaly, 2017, Description of a new neotropical species of Xiqilliba Kramer (Hemiptera: Cicadellidae: Neocoelidiinae), pp. 409-416 in Zootaxa 4311 (3) on pages 410-411, DOI: 10.11646/zootaxa.4311.3.6, http://zenodo.org/record/847936