Belostoma cummingsi De Carlo, 1935

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 : 22-24

Belostoma cummingsi De Carlo, 1935

( Figs 6A–L ; 17C ; 23A )

Belostoma foveolatum: De Carlo 1930: 113 , plate V ( Fig. 13 ) (not Mayr).

Belostoma cummingsi De Carlo, 1935: 203 , plate XVI ( Fig. 1 ), plate XVI ( Fig. 5 ).

Belostoma cachoeirinhensis Lanzer-de-Souza, 1996: 3 (probably).

Types.— B. cummingsi was described based on the male holotype ( Concordia , Entre Ríos Province, Argentina), and a female and other paratypes (São Paulo), and two paratypes (“Gob. [?] del Chaco ”) deposited in MACN. These specimens have not been examined .

Material examined.— ARGENTINA. *1 f ( SEMC 863): Buenos Aires, [without date and collector], M. S. Pennington det. as B. anurus, J. R. I. Ribeiro det. 1999. 1 f ( MACN 52461): same, Amilhorema [?], 1938, ([?] Viana), J. A. de Carlo det. 1 f ( MACN 39321): same, San Isidro, [without date and collector], J. A. de Carlo det. 1 f ( MACN 39321): same, VI.1936, ([?] Pereyra), J. A. de Carlo det. 1 f ( MACN 19018): Entre Ríos, [without date and collector], J. A. de Carlo det. BRAZIL. Rio Grande do Sul — * 3 m ( SEMC): Pelotas, VIII.1951, [without collector], J. R. I. Ribeiro det. 1999. 1 m / 1 f ( MACN 49963): same, X.1940, ( R. Figueiredo), J. A. de Carlo det. Santa Catarina — *7 f ( SEMC): Nova Teutônia, I.1954, (F. Plaumann), A. L. Estévez det. São Paulo — 1 f ( SEMC): [without a more precise locality], [without date], ( R. Spitz), J. R. I. Ribeiro det. 1999. *1 f ( SEMC): same, 1924, [without collector], D. W. Craik det. as B. foveolatum, J. R. I. Ribeiro det. 1999. 1 m / 1 f ( SEMC): same, 1924, [without collector], J. R. I. Ribeiro det. 1999. * 1 m ( SEMC 28322): same, 1924, [without collector], J. A. de Carlo det., [“a gift from Sweezey Kirk. remmant." [?]]. 1 m ( MACN 37791): same, VIII.1910, (A. da Serra), J. A. de Carlo det. 1 f ( MACN 50568): São Paulo, [without date], (O. Mintes), J. A. de Carlo det. 1 f ( SEMC): Ypirango sic [= Ipiranga], 30.XI.1923, ( R. Spitz), D. W. Craik det. as B. foveolatum, J. R. I. Ribeiro det. 1999. 1 m ( SEMC): same, [without date], ( R. Spitz), D. W. Craik det. as B. foveolatum, J. R. I. Ribeiro det. 1999. * 1 m ( SEMC): same, [without date], ( R. Spitz), D. W. Craik det. as B. foveolatum, J. R. I. Ribeiro det. 1999. 1 m ( SEMC 28322): same, 27.XI.1913, ( R. Spitz), H. B. Hungerford det. *1 f ( SEMC 28329): São Bernade sic [= São Bernardo do Campo], 28.II.1924, ( R. Spitz), J. A. de Carlo det. as B. foveolatum, H. B. Hungerford det. 1 m ( SEMC 28329): same, 28.II.1924, ( R. Spitz), J. A. de Carlo det. XI.1932 as B. bosci [= B. anurus ], H. B. Hungerford det., [“Europ. Trip, 1928”]. 1 f ( MNRJ 97): same, 24.VII.1955, (W. Bockermann), J. A. de Carlo det.

Distribution.— ARGENTINA: Buenos Aires ( De Carlo 1930), Chaco ( De Carlo 1930), Corrientes ( De Carlo 1930), Entre Ríos ( De Carlo 1930), Gualeguay ( De Carlo 1938). BRAZIL ( De Carlo 1930): Minas Gerais ( De Carlo 1938), Rio Grande do Sul ( Lauck 1962), Santa Catarina, São Paulo ( De Carlo 1935). PARA- GUAY ( De Carlo 1930). URUGUAY: Montevideo ( Ruffinelli & Pirán 1959), Rocha ( Ruffinelli & Pirán 1959), Treinta y Tres ( Ruffinelli & Pirán 1959).

Description.—Measurements (m / f). Total length (from apex of head to apex of hemelytra at rest) 33.3– 37.5 / 33.5–40.8; largest width of body 14.3–16.2 / 14.4–17.3; median length of pronotum 5.86–6.43 / 5.86– 6.86; greatest pronotal width 10.29–11.57 / 10.29–12.21.

General coloration brown. Pronotum usually with two lateral and longitudinal dark stripes.

Body elliptical. Length of anteoculus 0.97–1.23 times length of interoculus; length of rostral segment I 1.10–l.24 times length of segment II; anterior frontogenal suture usually longer than posterior frontogenal suture; clypeus usually reaching ocular line (0–0.17 mm); vertex without longitudinal median carina; posterior interocular width 1.15–1.31 times length of anteoculus, and 1.31–1.52 times width of eye; eyes rounded. Pronotum without longitudinal median carina; greatest pronotal width 1.74–1.90 times its length; scutellum reaching nodal line, with weakly longitudinal median carina; prosternal keel not prominent, rounded at apex ( Fig. 6A ). Pilosity extending along genital operculum, covering about two-thirds of connexivum.

Male genitalia ( Fig. 6D–F ).—Dorsal arms narrowed and curved at apex in dorsal view; ventral diverticulum without dorsal caudal protuberance in dorsal and lateral views, and with poorly developed ventroapical protuberance in lateral and ventral views; caudal lateral margins of ventral diverticulum convex, not sinuous in ventral view; width of ventral diverticulum about 1.5 times its length in ventral view.

Variation.—Forms with a prosternal keel more acute apically ( Fig. 6B–C ) are found in the states of Santa Catarina and Rio Grande do Sul. There is also variability in dorsal arms of phallotheca and shape of the ventral diverticulum. In specimens from the State of São Paulo the dorsal arms are broader at anteriorly and have a broader ventral diverticulum, whose width is about 1.7 times its length in ventral view ( Fig. 6G–L ).

Comparative notes.— Lanzer-de-Souza (1996) argued that B. cachoeirinhensis differed from B. cummingsi because of a less elliptical body, lengths of rostral segments I and II about equal, clypeus not reaching ocular line (0.20 mm), length of interoculus equal to its posterior width, and the shapes of prosternal keel and phallus. Both species differ from other known species in the B. dentatum group because the pilosity extends along the genital operculum. Nevertheless, there is considerable variation in clypeus, in length of rostral segments I and II, and in shape of prosternal keel and phallus in specimens of B. cummingsi studied here. Based on the description and figures given by Lanzer-de-Souza (1996), some specimens studied here seem not to differ from B. cachoeirinhensis in prosternal keel and phallus shape. Finally, B. cachoeirinhensis does not seem differ from B. cummingsi . Unfortunately, I could not borrow the holotype or paratypes of B. cachoeirin- hensis. Although Lanzer-de-Souza (1996) indicates that the holotype of this species is deposited in MCNZ, Dr. H. A. O. Gastal, curator at this museum, informed me that this institution does not house the B. cachoeirinhensis type. I therefore do not synonymize the species.

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 5. Belostoma costalimai De Carlo, 1938 and B. anurum (Herrich-Schäffer, 1848). B. costalimai. 5A–B, Prosternal keel (lateral view) of the specimens from Rio de Janeiro: 5A, DZRJ-a 469. 5B, DZRJ-a 470. 5C–H, Phallus: 5C–E, Specimen from Minas Gerais (MNRJ 113). 5F–H, Specimen from Rio de Janeiro (DZRJ-a 469). B. anurum. 5I–J, Prosternal keel (lateral view) of specimens from São Paulo: 5I, MZSP. 5J, DZRJ 15. 5K–P, Phallus: 5K–M, Specimen from Rio de Janeiro (DZRJ-a 497). 5N–P, Specimen from Rio de Janeiro (AMNH). 5C, 5F, 5K and 5N, Dorsal views. 5D, 5G, 5L, and 5O, Ventral views. 5E, 5H, 5M, and 5P, Lateral views. Scale bar: 1.00 mm.

FIGURE 6. Belostoma cummingsi De Carlo, 1935 and B. dallasi De Carlo, 1930. B. cummingsi. 6A–C, Prosternal keel (lateral view): 6A, Specimen from São Paulo (SEMC). 6B, Specimen from Rio Grande do Sul (SEMC). 6C, Specimen from Santa Catarina (SEMC). 6D–L, Phallus: 6D–F, Specimen from Rio Grande do Sul (SEMC). 6G–I, Specimen from Rio Grande do Sul (MACN 49963). 6J–L, Specimen from São Paulo (SEMC 28329). B. dallasi. 6M, Prosternal keel (lateral view): specimen from Ceará (DPIC). 6N–P, Phallus: Specimen from Minas Gerais (DPIC 97042). 6D, 6G, 6J, and 6M, Dorsal views. 6E, 6H, 6K, and 6N, Ventral views. 6F, 6I, 6L and 6O, Lateral views. Scale bar: 1.00 mm.

FIGURE 13. Belostoma stollii (Amyot & Serville, 1843). 13A–B, Prosternal keel (lateral view): 13A, Specimen from State of Rio de Janeiro (DZRJ-a 465), 13B, Specimen from State of Amazonas (SEMC). 13C–K, Phallus: 13C–E, Specimen from State of Rio de Janeiro (DZRJ-a 465). 13F–H, Specimen from Saracreek, Suriname (MACN). 13I–K, Specimen from State of Rio de Janeiro (DZRJ-a 466). 13C, 13F and 13I, Dorsal views. 13D, 13G, and 13J, Ventral views. 13E, 13H, and 13K, Lateral views. Scale bar: 1.00 mm.

FIGURE 17. Dorsal habitus. 17A, Belostoma candidulum Montandon, 1903: specimen from State of São Paulo (SEMC). 17B, B. costalimai De Carlo, 1938: specimen from State of Roraima (AMNH). 17C, B. cummingsi De Carlo, 1935: specimen from State of São Paulo (MACN 37791). 17D, B. dallasi De Carlo, 1930: specimen from State of Ceará (DPIC). Scale bar: 5.00 mm.

FIGURE 23. Geographic distribution map of Belostoma species in southeastern Brazil. 23A, = B. costalimai, = B. cummingsi, = B. dallasi. 23B, = B. dentatum, = B. dilatatum, = B. discretum, = B. elongatum.