Illustrated guide to Pentatominae (Hemiptera: Pentatomidae) species associated with the four main grain crops in Rio Grande do Sul state, Brazil Author Barros, Lurdiana D. Laboratory of Systematic Entomology, Department of Zoology, Institute of Biosciences, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves 9500, CEP 91509 - 900, Porto Alegre, RS, Brazil. Author Paim, Marcelo R. 0000-0003-2387-933X Laboratory of Systematic Entomology, Department of Zoology, Institute of Biosciences, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves 9500, CEP 91509 - 900, Porto Alegre, RS, Brazil. & marceloreginatop @ gmail. com; https: // orcid. org / 0000 - 0003 - 2387 - 933 X marceloreginatop@gmail.com Author Krein, Verônica 0000-0001-8106-2411 Laboratory of Systematic Entomology, Department of Zoology, Institute of Biosciences, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves 9500, CEP 91509 - 900, Porto Alegre, RS, Brazil. & vero. krein @ hotmail. com; https: // orcid. org / 0000 - 0001 - 8106 - 2411 vero.krein@hotmail.com Author Carabajal, Victor 0000-0001-6794-1022 Laboratory of Systematic Entomology, Department of Zoology, Institute of Biosciences, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves 9500, CEP 91509 - 900, Porto Alegre, RS, Brazil. & victorqcarabajal @ gmail. com; https: // orcid. org / 0000 - 0001 - 6794 - 1022 victorqcarabajal@gmail.com Author Brandão, Marcela N. 0000-0002-2918-788X Laboratory of Systematic Entomology, Department of Zoology, Institute of Biosciences, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves 9500, CEP 91509 - 900, Porto Alegre, RS, Brazil. & marcela. n. brandao @ gmail. com; https: // orcid. org / 0000 - 0002 - 2918 - 788 X marcela.n.brandao@gmail.com Author Bernardes, Paula De O. 0000-0001-8841-335X Laboratory of Systematic Entomology, Department of Zoology, Institute of Biosciences, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves 9500, CEP 91509 - 900, Porto Alegre, RS, Brazil. & paulabernardes 1616 @ gmail. com; https: // orcid. org / 0000 - 0001 - 8841 - 335 X paulabernardes1616@gmail.com Author Lindner, Mariana F. 0000-0002-4879-8221 Laboratory of Systematic Entomology, Department of Zoology, Institute of Biosciences, Universidade Federal do Rio Grande do Sul (UFRGS). Av. Bento Gonçalves 9500, CEP 91509 - 900, Porto Alegre, RS, Brazil. & mflindner @ hotmail. com; https: // orcid. org / 0000 - 0002 - 4879 - 8221 mflindner@hotmail.com text Zootaxa 2021 2021-04-14 4958 1 430 478 journal article 7221 10.11646/zootaxa.4958.1.27 7336298c-86ce-40e7-bab5-e75b0eddfdaa 1175-5326 4692176 303D300E-C17B-407C-A63B-53F906C5D825 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. 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. 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.