Contributions to the knowledge of Dichelops Spinola: description of a new species of Dichelops (Diceraeus) and of the male of Dichelops (Prodichelops) divisus (Hemiptera: Heteroptera: Pentatomidae: Pentatominae: Carpocorini) Author Poock-Da-Silva, Priscila Laboratório de Entomologia Sistemática, Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, 91501 - 970, Porto Alegre, RS, Brazil pripook@terra.com.br Author Barão, Kim Ribeiro Laboratório de Entomologia Sistemática, Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, 91501 - 970, Porto Alegre, RS, Brazil & Programa de Pós-Graduação em Biologia Animal, Universidade Federal do Rio Grande do Sul kbarao@yahoo.com.br Author Grazia, Jocelia Laboratório de Entomologia Sistemática, Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, 91501 - 970, Porto Alegre, RS, Brazil & Programa de Pós-Graduação em Biologia Animal, Universidade Federal do Rio Grande do Sul jocelia@ufrgs.br text Zootaxa 2013 2013-01-25 3609 1 journal volume 43935 10.11646/zootaxa.3609.1.4 b0280184-4185-4fd0-8bc9-c062756462f6 1175-5326 223229 94717F21-0352-4EB1-9BD2-154CABA2ABB4 Dichelops ( Prodichelops ) divisus ( Walker, 1867 ) ( Figs. 2 , 16–21 ) Diceraeus divisus Walker, 1867: 250 . Dichelops divisus ; Lethierry & Severin, 1893: 129 ; Kirkaldy, 1909: 68 . Dichelops ( Prodichelops ) divisus ; Grazia, 1978: 90–91 . Type : BMNH , HEM . 1056, female , Bates col., deposited at Natural History Museum, London, United Kingdom. Examined . Type locality . “Amazon Region”; according to label information, the specimen was collected in “St. Paulo” [São Paulo de Olivença, Rio Solimões, Amazonas, Brazil]. Head. Male proportion of antennal segments: I<II=III<IV>V; female proportion of antennal segments: I<II<III<IV<V. Male genitalia. Pygophore quadrangular ( Fig. 21 ); genital cup widely open dorsoposteriorly ( Figs. 16–19 ). Dorsal rim in an open ‘U’, sinuate at base, slightly projected over segment X ( Figs.18–19 ). Superior processes of dorsal rim spine-like placed before middle of lateral margins of dorsal rim, clearly distant from paramere apices. Posterolateral angles almost truncate not projected posteriorly, with dense and convergent bristle tufts ( Figs. 16–19 ). Ventral rim bisinuated, at middle in a shallow ‘U’ ( Figs. 16–17, 20–21 ); inferior layer of ventral rim projecting ventrad in a beaklike structure, well-observed in profile and/or in posterior view of pygophore ( Figs. 16–17 ). Bristles along ventral rim, especially over folded area inside genital cup, forming 1+1 tuft adjacent to posterolateral angles, 1+1 tuft laterad to ‘U’ concavity, and one tuft at middle of ‘U’ ( Figs. 17, 21 ). Parameres long and slender, scyte like, laterad directed. Segment X almost pyriform, with 1+1 minute tubercles at middle ( Fig. 19 ). Measurements (n=1). Body length 8.96; abdominal width 5.44; head length 1.92, width 2.0; interocular distance 0.96; length of antennal segments: I—0.72, II—0.8, III—0.8, IV—1.12, V—1.6; pronotum length 2.16, width 5.6, width including spines 6.4; scutellum length 3.28, width 3.2. FIGURES 1315. Dichelops ( Diceraeus ) caatinguensis sp. nov. , female genitalia. 13–14, genital plates, ventral view; 15, laterotergites, gonocoxites, and gonapophyses of ninth segment, and ectodermical genital ducts, ventral view (aaf, anterior annular flange; ch, chitinellipsen; cs, capsula seminalis; dr, ductus receptaculi; g9, gonapophyses 9; gc9, gonocoxites 9; la9, laterotergites 9; or, orificium receptaculi; paf, posterior annular flange; pco, pars communis; pi, pars intermedialis; tvi, thickening of vaginal intima; va, vesicular area; X, tenth segment) (Scale: figs. 13–14 = 1 mm; 15 = 0.3 mm). FIGURES 1621. Dichelops ( Prodichelops ) divisus , pygophore. 16–17, posterior view; 18–19, dorsal view; 20–21, ventral view. (dr, dorsal rim; pa, paramere; spdr, superior process of dorsal rim; vr, ventral rim; X, tenth segment) (Scales = 0.5 mm). Female measurements (n=2). Body length 9.32±0.06 (9.28–9.36); abdominal width 5.68±0.11 (5.6–5.76); head length 1.8±0.06 (1.76–1.84), width 2.2±0.06 (2.16–2.24); interocular distance 1.12±0.23 (0.96–1.28); length of antennal segments: I—0.52±0.06 (0.48–0.56), II—0.76±0.06 (0.72–0.8), III—0.92±0.06 (0.88–0.96), IV—1.2, V11.6; pronotum length 1.96±0.06 (1.92–2.0), width 6.2±0.06 (6.16–6.24), width including spines 7.56±0.51 (7.2–7.92); scutellum length 3.8±0.06 (3.76–3.84), width 3.76±0.34 (3.52–4.0). Material examined. BRAZIL , Amazonas , Estirão da Preta , Rio Liberdade , 11–15.V.2011 , D. Takyia col., sweep net ( INPA ), 13 , 1♀ . COLOMBIA , Amazonas , Prefectura de Tabatinga [ Leticia ], 12.IV.1992 , A. Saenz col. ( UFRG ), 1♀ . Comments. The male genitalia of Dichelops ( Prodichelops ) divisus are similar to the species of Dichelops ( Dichelops ) by the superior process of the dorsal rim as a spine-like structure, and by the parameres’ shape, wide at the base, tapering toward the apex. Dichelops ( Prodichelops ) divisus can be distinguished from the other subgenera by the dorsal rim of the pygophore being medially bisinuated, and by the ventral rim of the pygophore being ventrally projected, forming a beaklike structure. Distribution. Western Amazonia, in Brazil and Colombia, corresponding to Emeri, Varzea and Madeira biogeographic provinces ( sensu Morrone, 2006 ).