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 Chinavia nigridorsata (Breddin, 1901) ( Figs 41–43 ) Nezara nigridorsata Breddin, 1901: 123 . Acrosternum armigera : Costa & Link, 1974: 398 . Acrosternum (Chinavia) bellum Rolston, 1983: 110 ; Link & Grazia, 1987: 117 . Acrosternum bellum : Panizzi et al ., 2000 Chinavia nigridorsata : Schwertner & Grazia, 2007: 430 ; Fürstenau et al . 2013: 74–78 (key); Bianchi et al . 2019 ; Servino & Schwertner, 2020 (electronic key). Material studied. Cruz Alta : 1♀ 1♂ , 19.X.1981 , Link & Costa leg., “Colza” ( UFRG ) . Guaíba : 1♀ , Estação Experimental Agronômica , XII.1982 , G. Moreira leg. ( UFRG ) ; 1♀ , 01.X.1985 , Joá , Del Vecchio leg. ( UFRG ) . Rio Grande : 1♂ , Estação Ecológica do Taim , 01.IV.1981 , J. Grazia leg. ( UFRG ) . Diagnostic features. Body green to light green ( Fig. 41 ), lateral margins of mandibular plates, pronotum, hemelytra and connexivum reddish ( Fig. 41 ). Cicatrices of pronotum and basal angles of scutellum immaculate ( Fig. 42 ). Posterolateral angles of connexivum maculate ( Fig. 41 ). Spiracles black surrounded by a yellow callus. Humeral angles produced into a spine ( Figs 41–42 ). Body length: 11.00–13.00 mm ( Schwertner & Grazia 2007 ; Garbelotto & Campos 2014 ). Recorded host plants. Soybean and wheat ( Lopes et al . 1974 ; Link & Grazia 1987 ), and Canola ( Bianchi et al. 2019 ). Distribution in Rio Grande do Sul . Cruz Alta, Guaíba, Rio Grande, Santa Maria and Passo Fundo ( Fig. 43 ). Comments. This species is similar to C. armigera , being differentiated by having the mandibular plates narrower and margins of body reddish instead of yellowish. New records. Cruz Alta and Guaíba.