Xenogenus picturatum Berg 1883

Diez, Fernando & Coscarón, María Del Carmen, 2015, Contribution to the knowledge of Patagonia, Argentina: redescription of the genus Xenogenus Berg 1883 (Hemiptera: Heteroptera: Rhopalidae) and description of immature stages of Xenogenus gracilis Reed, 1899, Zootaxa 3919 (3), pp. 573-582 : 579-580

Xenogenus picturatum Berg 1883

( Fig. 1 C) ( Figs. 4 A–E)

http:// heteroptera .myspecies.info/taxonomy/term/2160

1893 Xenogenus extensum Distant , 1: 461.

1893 Darmistidus maculatus Uhler , 707. Synonymized by Torre-Bueno (1941).

Distribution in Argentina. Buenos Aires: José C. Paz, ( Pall & Coscarón 2012), Sierras Tandilenses ( Dellapé & Carpintero 2012); Catamarca: Belén; San Juan: Villa Aberastein ( Pall & Coscarón 2012); La Rioja ( Pennington 1922); Salta: General Güemes; Santiago del Estero: Quimilí ( Pall & Coscarón 2012).

Distribution outside Argentina. Uruguay: Banda Oriental ( Berg 1883). Bolivia ( Pennington 1922). Central America, North America and South America (Göllner Scheiding 1983). Cuba; Mexico; Nicaragua; Puerto Rico; USA (Maes & Göllner Scheiding 1993).

Material examined. Argentina: Catamarca: Belén (1♂, MLP) Torres-Ferreyra col. 9/III/62; Santiago del Estero: Quimilí (1♂, MLP) Biraben-Bezzi col. 9/XII/1939; Jujuy: Pampa Blanca (1♂, MLP) Biraben-Scott col. 13/ II/1939; Chubut: Esquel (1♂) Col. Diez-Coscarón-Pall-Quirán 22/II/2013, altitude 562 meters, time: 18:00 hr; Neuquén: near Junín de los Andes (1♂) Col. Diez-Coscarón-Ruiz Spindola, altitude 902 meters, time: 18:00 hr.

New record. Argentina: Chubut: Esquel.

Observation. The species currently assigned to the taxon is listed in Coscarón et al. (2014).

Remarks. Pall (et al. 2013) due to that great similarity of this two species made a mis identifications. The distributions we cited from Pall et al. (2013) were corroborated.

Overall color light brown, with propleuron, thoracic pleura, femora, tibiae, corium and ventral surface of abdomen a few red to dark brown dots ( Fig. 1 C). Body covered with abundant whitish pilosity. Head 1.58 times longer than head width, one irregular spot in the middle ( Fig. 1 C). Total length of head 2.04 times longer than anteocular region. Labium reaching the posterior margin of the metasternum. First segment not surpassing the posterior margin of the eye. Ratio of labial segment lengths: 1: 0.92: 0.61: 0.65. Ratio of antennal segment: 1: 2.16: 2.33: 2.66. First antennal segment length 0.47 times as short as head length. Lateral surface of first antennal segment brown. Second and third labial segments totally light brown. Pronotum 2.15 times wider than pronotum length. Anterior and posterior lobes clearly separated, anterior lobe with two depressions, posterior lobe coarsely punctate, posterior margin softly convex. Median longitudinal keel conspicuous, more conspicuous on the anterior lobe. Whitish setae on lateral margins of the scutellum and posterior process rounded. Posterior femora longer than fore and middle femora, 1.86 times as long as fore femora, and 1.72 times as long as middle femora. Posterior tibiae very long, 1.41times longer than fore tibiae and 1.48 times longer than middle tibiae. First tarsi and hind tibiae black distally, third tarsi black. Hemelytra: clavus dark brown, corium hyaline, red dots on veins of corium; membrane hyaline, in some specimens with red dots and surpassing apex of abdomen. Abdomen, with red spots on ventral surface, most densely towards lateral margins.

Male genitalia ( Figs. 4 A–E): pygophore with lateral lobes subtriangular, contracted in base ( Figs. 4 A–C); paralateral lobes slender, triangular and apex acute ( Fig. 4 B); paramere a little curved and protruding (the apex of the lateral lobes reaching 2/3 of the paramere) ( Figs. 4 A–B): Paramer with internal margin not inwards, apex quadrangular and blunt ( Fig. 4 E).

Figures

FIGURE 1. General aspect. X. gracilis ♂, dorsal view (A – B); X. picturatum ♂, dorsal view (C); X. gracilis ♀ dorsal view (D – E).

FIGURE 4. Male genitalia. X. picturatum. Genital capsule in situ (A), genital capsule (B), pygophore (C), male phallus (D), paramere (E). L lo: lateral lobe; M lo: medial lobe; Pa: paramere; Pa lo: Paralateral lobes.