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 Thyanta (Argosoma) humilis Bergroth, 1891 ( Figs 104–106 ) Pentatoma patruelis Stål, 1859: 226 . Preoccupied. Thyanta patruelis Berg, 1878: 23 ; Torre-Bueno 1915: 161 . Thyanta ( Argosoma ) humilis Bergroth, 1891: 225 . Thyanta ( Argosoma ) patruelis Rider & Chapin, 1991: 37 . Material studied. Maquiné: 1♀ , Garapiá-varredura , 21.XII. 2006 , R. C. Bins-Neto & L. M. Weiler , LES–926; 1♀ , Trilha 5, guarda-chuva, 03.IV.2006 , J. L. C. Bernardes leg., LES –925, J. Grazia det. 2006 ( UFRG ) ; 1♀ , Trilha 4, 02.IV.2006 , J. L. C. Bernardes leg., LES–922, J. Grazia det. 2006 ( UFRG ) . Santa Maria: 1♀ , 26.IV.1987 , D. Link leg., “Erva de bicho” ( UFRG ) . FIGURES 104–106. Thyanta (Argosoma) humilis . 104: Dorsal view, scale bar = 1.0 mm. 105: Head and pronotum. 106: Distribution within Rio Grande do Sul. Diagnostic features. Body dorsal and ventral surfaces green to castaneous. Red macule on dorsal median area of head and apex of scutellum ( Fig. 104 ). Mandibular plates subequal to clypeus and rounded apically ( Fig. 105 ). Pronotum with a red to purple transumeral band ( Fig. 104 ). Anterolateral margins of pronotum straight to slightly concave ( Figs 104–105 ). Humeral angles slightly developed, rounded apically ( Fig. 105 ). Body length: 7.50–9.50 mm ( Garbelotto & Campos 2014 ). Recorded host plants. Canola (Marsaro Jr. et al . 2017; Bianchi et al . 2019 ). Distribution in Rio Grande do Sul . Maquiné, Passo Fundo and Santa Maria ( Fig. 106 ). New records. Maquiné and Santa Maria.