Bucephalogonia xanthophis (Berg)

Defea, Bárbara, Virla, Eduardo G., Logarzo, Guillermo A., Cavichioli, Rodney R., Tapia, Silvia, Aguirre, Máximo R., Kay, Fernando Mc, Martin, Santiago & Paradell, Susana L., 2022, Contributions to the knowledge of the Cicadellini sharpshooters (Hemiptera: Cicadellidae) associated with citrus orchards in Argentina, Zootaxa 5205 (1), pp. 55-72 : 61

Bucephalogonia xanthophis (Berg)

( Fig 1b )

Additional characters of the female genitalia ( Fig 2 ). Valvifers I ( Fig 2b ), in lateral view, subtriangular, dorsal margin with an internal fold and scarcely more sclerotized anteriorly; apical half heavily covered by spiniform processes. Valvulae I ( Fig 2e–h ), in lateral view, blade-shaped; shaft straight basally, with apical half curved dorsally; basal area, in lateral view, with a dorsal lobe ( Fig 2e ) and ventral surface covered by numerous spiniform processes ( Fig 2g ). Dorsal sculptured area (DSA) extending nearly ¾ of apical shaft, with sculpturing pattern formed by oblique filiform processes. Ventral sculptured area (VSA) less developed, formed by scale-like processes, not imbricate, becoming clearly distinct towards subapical area. Ventral interlocking device long, attaining basal half of shaft. Preapical area of blade with denticles on ventral margin, apex acute ( Figure 3h ). Valvifers II ( Fig 2d ), in lateral view, subrectangular shaped, with robust microsetae clustered near articulation point; posterior margin more sclerotized. Valvulae II ( Fig 2i–k ), in lateral view, broad beyond basal curvature, with dorsal margin of shaft almost straight and bearing numerous contiguous teeth, each tooth ( Fig 2j ) subtriangular with posterior margin declivous and longer than anterior margin, both bearing numerous rounded denticles. Preapical prominence present; apical area distinctive with margins sharpened and denticulate, apex rounded ( Fig 2k ); ducts reaching teeth margin and apex. Gonoplacs ( Fig 2l ), in lateral view, with basal half narrow, 0.5x longer than posterior portion, distinctly expanded; with submarginal macrosetae extending anteriorly along ventral margin; apex narrowly round.

Distribution. Argentina ( Young 1977): Jujuy, Córdoba, Misiones ( Remes Lenicov et al. 1999), Tucumán ( Luft Albarracín et al. 2009), Entre Ríos ( Dellapé et al. 2016), Santa Fé, Buenos Aires ( Paradell et al. 2014a). New records: Formosa (Laguna Oca), Salta (Los Sauces, Orán, Quebrada Río Las Conchas, Tartagal), Tucumán (Río Punco, Trancas), Santiago del Estero (Loreto), Chaco (Chilecito, Colonia Brandsen, Makallé, Presidencia de la Plaza, Resistencia, Roque Saenz Peña), Corrientes (Bella Vista), Catamarca (Andalgalá, Belén, El Rodeo, San Antonio), La Rioja (Anillaco, Famatina, Sañogasta ), San Luis (Concarán, Santa Rosa), San Juan (San Juan), Mendoza (San Martín).

Associated Plants. Citrus sinensis Osb. ( Remes Lenicov et al. 1999) , Vitis vinifera L. ( Ringenberg 2008), Prunus domestica L. ( Hickel et al. 2001), Coffea sp. (Garita Cambronero et al. 2008), Vernonia condensata (Baker) , Duranta repens L. ( Marucci et al. 2003), Zea mays L. ( Luft Albarracin et al. 2009), Brassica napus L. var. oleifera ( Paris et al. 2012) . New records on Allium cepa L. ( Amaryllidaceae ), Olea europaea L. var Arauco (Oleaceae) , Solanum tuberosum L. ( Solanaceae ), Tecoma stans (L.) ( Bignoniaceae ), Gossypium sp. (Malvaceae) , Baccharis sp. (Asteraceae) .

Biological data. Faunistic studies done by Remes Lenicov et al. (1999) and Dellapé et al. (2016), on citrus agroecosystems located in northeastern Argentina, showed that B. xanthophis is a predominant species throughout the year that not only occurs on citrus plants but also take refuge on weeds.

Phytosanitary importance. This species is a confirmed vector of the bacterium Xylella fastidiosa subsp. pauca in Brazil, where it is considered the most important vector in relation to its transmission capacity ( Fundecitrus 1999). B. xanthophis is also referred as a potential vector in coffee by Leite & Nunes (2003). In Argentina, screening tests on specimens collected from citrus orchards in Misiones and Entre Ríos provinces were positive for the bacterium ( de Coll et al. 2000; Dellapé et al. 2016).

Figures

FIGURE 1. Dorsal habitus Cicadellini species associated with citrus orchards in Argentina. A. Borogonalia impresscifrons, B. Bucepahlogonia xanthophis, C. Diedrocephala bimaculata, D. Dilobopterus costalimai, E. Erhythrogonia. dottaga, F. Fonsecaiulus sciotus, G. Macugonalia cavifrons, H. M. leucomelas, I. M. sobrina, J. Scopogonalia osteiphera, K. S. penicula, L. S. subolivacea, M. Sonesimia grossa, N. Scoposcartula limitata. Scales= 2mm.

FIGURE 2. Female genitalia of Bucephalogonia xanthophis. A. Sternite VII, ventral view, B. Pygofer, lateral view, C. Valvifer I, lateral view, D. Valvifer II, lateral view, E–F. Valvula I, lateral view: E. General aspect, F. Dorsal Sculptured Area (DSA), in detail, G. Ventral surface of basal portion, in detail, H. Apex. I–K. Valvula II, lateral view: I. General aspect, J. Tooth, K. Apex, L. Gonoplac, general aspect. Scales=0,5 mm: A, B, E, I, L; 0,3 mm: C, D.

FIGURE 3. Female genitalia of Dilobopterus costalimai. A. Sternite VII, ventral view, B. Sternite VIII, caudal view, C. Pygofer, lateral view, D. Valvifer I, lateral view, E. Valvifer II, lateral view, F–H.Valvula I, lateral view: F. General aspect, G. apex, H. ventral fold, in detail, I–K. Valvula II, lateral view: I. General aspect, J. Tooth, K. apex, L. Gonoplac, general aspect. Scales=0,5 mm.