Belostoma bosqi De Carlo, 1932

Ribeiro, Josė Ricardo Inacio, 2007, A review of the species of Belostoma Latreille, 1807 (Hemiptera: Heteroptera: Belostomatidae) from the four southeastern Brazilian states, Zootaxa 1477 (1), pp. 1-70 : 17-18

Belostoma bosqi De Carlo, 1932

( Figs 4I–P ; 16D ; 22B )

Belostoma bosqi De Carlo, 1932: 125 , plate V ( Fig. 1 ).

Belostoma bergi: De Carlo 1930: 117 , plate V ( Fig. 4 ) (not Montandon).

Belostoma bosci: Schnack 1976: 17 .

Types.— Belostoma bosqi was described from a male holotype (Chaco Province, Argentina) deposited in MACN and five paratypes also in MACN (Misiones Province, Argentina), MLPA (from [?], Paraguay), and in Pellerano’s collection (Corumbá, Mato Grosso do Sul ). According to Lauck (1964), there are two females (Santo Tomé, Corrientes Province, Argentina) deposited in SEMC, labelled, and determined as paratypes by De Carlo. These specimens have not been examined .

Material examined.— BRAZIL. Amazonas — *1 f ( INPA 0020983 ): [without a more precise locality], 16. V.1976, (I. S. Gorayeb), J. R. I. Ribeiro det. 1999, [at light]. *1 f ( INPA 0020941 ): Manaus , 25. VI.1976, ([?] Nilce), J. R. I. Ribeiro det. 1999. 2 m ( MNRJ 167 ): same, Negro River , 08–24.VII.1941, (Parko [?]), J. C. M. Carvalho det. 1952. Mato Grosso — 1 m ( MZSP): S. [?] Domingo , XI.1949, ([?] Werner), J. R. I. Ribeiro det. 1999. Mato Grosso do Sul — * 2 m / 1 f ( DZRJ 25 ): Corumbá, Popular Nova , 06.II.1997, (J. R. I. Ribeiro), J. R. I. Ribeiro det. 1999. * 2 m / 4 f ( SEMC): Salobra , I.1955, (C. A. Camargo), J. R. I. Ribeiro det. 1999, [“exch. P. F. S. Pereira ”]. Minas Gerais — * 2 m / 1 f ( DPIC): Paracatu [point II], 04. VI.1991, (A. C. Faria), J. R. I. Ribeiro det. 1999. * 1 m ( DPIC): same, 03. VI.1991, (A. C. Faria), J. R. I. Ribeiro det. 1999. * 1 m ( DPIC 3232 ): Sete Lagoas , 18.XI.1960, (M. A. R. Oliveira), J. R. I. Ribeiro det. 1999. Rondônia — * 1 m ( INPA 0020940 ): Porto Velho , 30.IV.1979, (J. Campbell), J. R. I. Ribeiro det. 1999. São Paulo — 1 m ( AMNH): Cosmópolis , 25.I.1974, (J. G. Rozen, F. C. Thompson, and J. S. Moure), J. R. I. Ribeiro det. 1999.

Distribution.— ARGENTINA: Chaco ( De Carlo 1930), Corrientes ( Lauck 1964), Misiones ( De Carlo 1932). BOLIVIA: Pando ( Lauck 1964) [as “Chiquitos”], Santa Cruz ( Lauck 1964). PARAGUAY ( De Carlo 1930): Central ( Lauck 1964). BRAZIL: Amazonas ( Nieser 1975), Goiás ( Menke & Lauck 1962), Mato Grosso ( Lauck 1964), Mato Grosso do Sul ( De Carlo 1930), Minas Gerais (new record in southeastern Brazil), Rondônia (new record), São Paulo (new record in southeastern Brazil), Tocantins ( Lauck 1964) [as Goiás-Ilha do Bananal]. PERU: Huánuco ( Lauck 1964), Ucayali ( Lauck 1964) [as “Aguaytía]. SURINAM: Marowijne ( Nieser 1975), Moengo Rio Cottica ( Lauck 1964). VENEZUELA: Portuguesa ( Lauck 1964).

Description.—Measurements (m / f). Total length (from apex of head to apex of hemelytra at rest) 20.4– 25.3 / 19.2–24.4; largest width of body 9.5–12.5 / 9.0–11.5; median length of pronotum 2.65–3.42 / 2.65– 3.33; greatest pronotal width 6.00–7.58 / 5.60–7.08.

General coloration yellowish brown. Longitudinal median yellowish or whitish stripe on pronotum and scutellum; two lateral stripes on pronotum only.

Body flattened and strongly elliptical, lateral borders of thorax aligned to anterior borders of abdomen. Length of anteoculus 0.83–1.00 time length of interoculus; length of rostral segment I 1.11–1.27 times length of segment II; anterior frontogenal suture equal to longer than posterior frontogenal suture; clypeus reaching or not reaching ocular line (0–0.17 mm); vertex without longitudinal median carina; posterior interocular width 1.20–1.44 times length of anteoculus, and 1.36–1.57 times width of eye; eyes triangular. Pronotum without longitudinal median carina; pronotum at widest point width 2.07–2.36 times its length; scutellum not reaching nodal line (0.40–1.40 mm), with weakly longitudinal median carina; prosternal keel prominent, slightly acute and anteriorly projected at apex ( Fig. 4I ). Pilosity not extending along genital operculum, covering about one-third of connexivum.

Male genitalia ( Fig. 4K–M ).—Dorsal arms weakly convergent, strongly acute at apex in dorsal view; ventral diverticulum without dorsal caudal protuberance in dorsal and lateral views, and without ventroapical protuberance in lateral and ventral views; caudal lateral margins of ventral diverticulum with some sinuosity in ventral view; width of ventral diverticulum equal to its length in ventral view.

Variation.—In a specimen from the State of Minas Gerais the prosternal keel is sinuous and truncated at its apex ( Fig. 4J ). Another specimen has the anterior portion of the phallus slightly broader and with dorsal arms shorter and larger in dorsal view, surpassing the dorsal caudal margin of the ventral diverticulum ( Fig. 4N–P ).

Comparative notes.—As suggested above, it seems certain that the longitudinal median carina on the vertex of B. bergi and B. bosqi is a case of intraspecific variation. However, Schnack (1973, 1976) did not mention the presence of a longitudinal median carina on the vertex of B. bosqi , although this was mentioned by De Carlo (1930, 1932, 1938) and Nieser (1975).

Figures

FIGURE 1. External morphology of Belostoma Latreille, 1807 showing the major morphological features referred to in the taxonomic descriptions. 1A, Dorsal aspect of head, pronotum, and part of abdomen of Belostoma. 1B, Dorsal aspect of head. 1C, Lateral aspect of head. (CLY) clypeus; (LAN) length of anteoculus; (LAF) length of anterior frontogenal suture; (LEY) length of eye; (LIN) length of interoculus; (LPF) length of posterior frontogenal suture; (LPR) length of pronotum; (LR1) length of rostral segment I; (LR2) length of rostral segment II; (LWP) greatest pronotal width; (NLI) nodal line; (OLI) ocular line; (PIW) posterior interocular width; (PKE) prosternal keel; (WEY) width of an eye.

FIGURE 4. Belostoma bergi (Montandon, 1899) and B. bosqi De Carlo, 1932. B. bergi. 4A–B, Prosternal keel (lateral view): 4A, Specimen from São Paulo (MNRJ 165); 4B, Specimen from Corrientes, Argentina (MNRJ 166). 4C–H, Phallus: 4C–E, Specimen from Corrientes, Argentina (MNRJ 166). 4F–H, Specimen from São Paulo (MNRJ 164). B. bosqi. 4I–J, Prosternal keel (lateral view) of the specimens from Minas Gerais (DPIC). 4K–P, Phallus: 4K–M, Specimen from Minas Gerais (DPIC). 4N–P, Specimen from Mato Grosso (SEMC). 4C, 4F, 4K, and 4N, Dorsal views. 4D, 4G, 4L, and 4O, Ventral views. 4E, 4H, 4M, and 4P, Lateral views. Scale bar: 1.00 mm.

FIGURE 16. Dorsal habitus. 16A, Belostoma anurum (Herrich-Schäffer, 1848): specimen from State of Minas Gerais (MZSP). 16B, B. aurivillianum (Montandon, 1899): specimen from State of Roraima (INPA 0020902). 16C, B. bergi (Montandon, 1899): specimen from Rio Grande [?] (MNHN, lectotype). 16D, B. bosqi De Carlo, 1932: specimen from State of Rondônia (INPA 0020940). Scale bar: 10.00 mm.

FIGURE 22. Geographic distribution map of Belostoma species in southeastern Brazil. 22A, = B. anurum, = B. aurivillianum. 22B, = B. bergi, = B. bosqi; = B. candidulum.