Euschistus (Lycipta) picticornis Stål, 1872

Barros, Lurdiana D., Paim, Marcelo R., Krein, Verônica, Carabajal, Victor, Brandão, Marcela N., Bernardes, Paula De O. & Lindner, Mariana F., 2021, Illustrated guide to Pentatominae (Hemiptera: Pentatomidae) species associated with the four main grain crops in Rio Grande do Sul state, Brazil, Zootaxa 4958 (1), pp. 430-478 : 452-453

Euschistus (Lycipta) picticornis Stål, 1872

( Figs 59–62 )

Euschistus (Lycipta) picticornis Stål, 1872b: 23 ; Rolston, 1982: 291–293.

Euschistus picticornis: Berg, 1879: 280 ; Berg, 1883: 206; Kirkaldy, 1909: 65; Pennington, 1920: 8; Pirán, 1948: 11.

Material studied. Caçapava do sul: 1♀, mata ciliar, campo, 15.VI.2003, varredura, Bunde & Silva leg. ( UFRG) ; Rio Grande : 1♂, 4♀, Estação Ecológica do Taim, BR 47 Km 96, 04–05.XII.2010, B. B. R. J, Fürstenau & R. J. Fürstenau leg. ( UFRG) . São Francisco de Paula : 1♀, Floresta Nacional de São Francisco de Paula, 13.I.2007, C. F., Schwertner leg. ( UFRG) .

Diagnostic features. Body dorsal and ventral surfaces dark castaneous, with wrinkled appearance ( Fig. 59 ). Mandibular plates subequal to clypeus, rounded apically ( Fig. 61 ). Anterolateral margins of pronotum concave and with spaced denticles. Humeral angles dark castaneous to reddish castaneous, strongly developed, rounded apically and directed anterolaterally ( Fig. 61 ). Pronotum, scutellum and corium with pale spots, impunctate. Apex of scutellum with a large pale yellow callosity ( Fig. 59 ). Legs with dark castaneous spots. Veins of the membranous portion of hemelytra reticulate ( Fig. 60 , black arrow). Connexivum dark castaneous to greenish castaneous with dark spot on angles, posterior angle produced ( Fig. 59 ). Body length: 10.00 mm.

Recorded host plants. Canola (Marsaro Jr. et al. 2017; Bianchi et al. 2019), rice ( Grazia 1977; Link & Grazia 1987) and soybean ( Lopes et al. 1974; Link & Grazia 1987).

Distribution in Rio Grande do Sul. Caçapava do Sul, Passo Fundo, Rio Grande, Santa Maria, São Francisco de Paula and Sobradinho ( Fig. 62 ).

New records. Caçapava do Sul.

Figures

FIGURES 59–62. Euschistus (Lycipta) picticornis. 59: Dorsal view, scale bar = 1.0 mm. 60: Membranous portion of hemelytra, with reticulated veins (arrow). 61: Head and pronotum. 62: Distribution within Rio Grande do Sul.