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 Agroecus griseus Dallas, 1851 ( Figs 16–19 ) Agroecus griseus Dallas, 1851: 199 ; Walker, 1867: 243 ; Stål, 1872b: 23 ; Distant, 1880: 329 ; Lethierry & Severin, 1893: 126 ; Kirkaldy, 1909: 63 ; Jensen-Haarup, 1937: 171 ; Buckup, 1957: 8 ; Buckup, 1961: 9 ; Rider & Rolston, 1987: 437–438 . Agroecus tenebricosus Buckup, 1957: 8 . Material studied. Barra do Ribeiro: 1♂ , Boa Vista farm, 30°27’25.4”S 51°16’23.8”W , 16.XII.2003 , Probio Team leg. ( MCNZ ) . Itaúba : 1♀ , 06.IV.1978 , H. Bischoff leg. ( MCNZ ) ; 1♂ , 1♀ , 18.IV.1978 , M. H. Galileo leg. ( MCNZ ) ; 1♂ , 1♀ , 06.IV.1978 , E. H. Buckup leg. ( MCNZ ) ; 2♀ , 06.IX.1978 , E. H. Buckup leg. ( MCNZ ) . Palmares do Sul : 1♀ , 1♂ , Capivari Lake isthmus, 30°15’08.2”S 50°32’01.1”W , 20.V.2004 , Probio Team leg. ( MCNZ ) . Porto Alegre: 1♂ , Agronomia , 24.X.1985 , Fernandes leg. ( UFRG ) ; 1♂ , Vila Assunção , 21.IV.1985 , A. Mohr leg. ( UFRG ) ; 1♂ , 26.XI.1991 , J. A. M. Fernandes leg. ( UFRG ) ; 1♀ , 24.IX.1952 ( MCNZ ) ; 1♀ , 23.IX.1952 ( MCNZ ) ; 1♀ , 09.V.1951 ( MCNZ ) ; 1♀ , 23.XII.1952 ( MCNZ ) ; 1♀ , 08.IX.1948 ( MCNZ ) ; 1♀ , 18.II.1953 ( MCNZ ) ; 1♂ , 13.V.1953 ( MCNZ ) ; 1♂ , 03.X.1951 ( MCNZ ) , 1♂ , 18.VIII.1954 ( MCNZ ) ; 1♂ , 24.X.1956 ( MCNZ ) ; 1♂ , 27.VI.1953 ( MCNZ ) ; 1♂ , 20.IX.1954 ( MCNZ ) ; 1♂ , 05.X.1949 ( MCNZ ) . São Leopoldo: 1♀ , ( MCNZ ) . Triunfo : 1♂ , Parque Braskem , main trail, 16.IX.2009 , A. Barcellos & D. Casagrande leg. ( MCNZ ) ; 1♂ , Parque Copesul , Mirante do Umbu trail, 29.IV.2003 , ( MCNZ ) ; 1♂ , Parque Copesul , portico trail, 29.IV.2003 , ( MCNZ ) ; 1♂ , Parque Copesul , 19.XI.2002 , ( MCNZ ) . Tupandi : 1♀ , V.2009 , R. V. Dalbem leg. ( UFRG ) . FIGURES 16–19. Agroecus griseus . 16: Dorsal view, scale bar = 1.0 mm. 17: Corium, with unpunctured bands. 18: Fore and mid femora bearing small tubercles. 19: Distribution within Rio Grande do Sul. Diagnostic features. Body grayish. Head wider than long; mandibular plates and clypeus subequal in length. Anterolateral margins of pronotum straight or sub rectilinear and crenulated ( Rider & Rolston 1987 ); humeral angles weakly produced and obtuse; trans-humeral band with callosities but without punctures ( Fig. 16 ). Scutellum with a prominent Y-shaped tubercle ( Fig. 16 ). Corium bands without punctures ( Fig. 17 , red arrow) and minute teeth on lateral margins ( Fig. 17 ). All femora with two rows of small tubercles bearing setae ( Fig. 18 ). Body length: 7.00– 8.50 mm . Recorded host plants. Maize ( Gassen 1996 ; Fávaro et al . 2012 ). Distribution in Rio Grande do Sul . Barra do Ribeiro, Itaúba, Palmares do Sul, Porto Alegre, Santa Maria, São Leopoldo, Triunfo and Tupandi ( Fig. 19 ). New records. Barra do Ribeiro, Itaúba, Palmares do Sul, Porto Alegre, São Leopoldo, Triunfo and Tupandi. Comments. This species feeds at the base of plants, affecting tissue formation during growth ( Gassen 1996 ).