Dichelops (Prodichelops) divisus ( Walker, 1867 )

Poock-Da-Silva, Priscila, Barão, Kim Ribeiro & Grazia, Jocelia, 2013, 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), Zootaxa 3609 (1) : -

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.

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).

Figures

FIGURES 1 – 2. Dorsal view: 1, Dichelops (Diceraeus) caatinguensis sp. nov.; 2, Dichelops (Prodichelops) divisus (Scales = 1 mm).

FIGURES 16 – 21. 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).