Diceraeus furcatus ( Fabricius, 1775 )

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 : 449-450

Diceraeus furcatus ( Fabricius, 1775)

( Figs 50–52 )

Cimex furcatus Fabricius, 1775: 705 .

Dichelops furcatus: Berg, 1878: 308 ; Costa & Link, 1974: 398–399.

Dichelops (Neodichelops) furcatus: Grazia, 1978: 68 .

Dichelops (Diceraeus) furcatus: Grazia & Schwertner, 2008: 234 ; Bianchi et al. 2019.

Diceraeus furcatus: Barão et al. 2020: 10 (stat. rev. by Barão et al. 2020)

Material studied. Bagé : 3♀, Arroio S [an]ta Maria Chicó, 30.XI.2006, Schwertner & Cohen leg. ( UFRG) . Derrubadas : 2♂, 1♀, Parque Estadual do Turvo, 26–30.IX.1983, S. L. Bonatto leg. ( UFRG) . Guaíba : 1♀, 01.X.1998, Del Vecchio, M.C. leg., “em Joá” ( UFRG) . Passo Fundo : 02.III.1974, A. R. Panizzi leg. ( UFRG) . Porto Alegre : 1♀, Ponta Grossa, 06.III.1974, A. R. Panizzi leg. ( UFRG) . Santa Maria : 1♂, 06.III.1990, D. Link leg., “Picão Preto” ( UFRG) . São Sepé : 2♀, 13.XII.1891, E. C. Costa leg., “Feijoeiro”, J. Grazia det. 1986 ( UFRG) .

Diagnostic features. Body light castaneous, ventral surface usually lighter. Mandibular plates longer than clypeus and acute apically ( Figs 50–51 ). Humeral angles variable in development, from weakly produced to forming a spine ( Fig. 51 ). Outline of anterolateral margins of pronotum with dark punctures. Body length: 10.00–12.00 mm ( Grazia 1978; Garbelotto & Campos 2014).

Recorded host plants: Barley; canola (Marsaro Jr. et al. 2017; Bianchi et al. 2019), maize ( Roza-Gomes et al. 2011), oat ( Pereira & Salvadori 2020), rye ( Pereira & Salvadori 2020), soybean ( Costa & Link 1974; Lopes et al. 1974; Grazia 1978; Link & Grazia 1987; Panizzi et al. 2015) and wheat ( Panizzi et al. 2015).

Distribution in Rio Grande do Sul. Bagé, Bom Jesus, Butiá, Carazinho, Caxias do Sul, Derrubadas, Farroupilha, Flores da Cunha, Gramado, Guaíba, Imbé, Lajeado, Marau, Marcelino Ramos, Nova Prata, Osório, Passo Fundo, Pelotas, Porto Alegre, Quaraí, Rio Pardo, Santa Maria, Santo Augusto, São Sepé, Torres, Vacaria and Viamão ( Fig. 52 ).

New records. Bagé and Derrubadas.

Comments. Both adults and nymphs cause damage to the base of the plants, through the leaf sheath, reaching the inner leaves.

Figures

FIGURES 50–52. Diceraeus furcatus. 50: Dorsal view, scale bar = 1.0 mm. 51: Head and pronotum. 52: Distribution within Rio Grande do Sul.