Belostoma foveolatum ( Mayr, 1863 )

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 : 29-30

Belostoma foveolatum ( Mayr, 1863)

( Figs 8 ; 19B ; 24A )

Zaitha foveolata Mayr, 1863: 355 .

Zaitha foveolatum: Berg 1879: 192 .

Belostoma foveolatum: Kirkaldy & Torre-Bueno 1909: 191 .

Types.— Belostoma foveolatum was described from the female holotype [locality unknown] deposited in NHMW.

Material examined.—1 f ( NHMW): [without a more precise locality, date, and collector], A. L. Montandon det. 1909, G. Mayr det. 1863, holotype. BRAZIL. Pará — 1 f ( INPA 0020872 ): Curuauna [“near San- tarém”], X–XI.1980, ( R. C. Best), J. R. I. Ribeiro det. 1999. 1 f ( SEMC): Lago Grande , II.1939, (A. M. Olalla), D. R. Lauck det. 1959. 1 m / 2 f ( AMNH): Jacareacanga , VI.1970, (M. Alvarenga), J. R. I. Ribeiro det. 1999. Ceará — 1 f ( AMNH): [without a more precise locality and date], ([?] Manin), J. R. I. Ribeiro det. 1999. 1 f ( DZRJ 24 ): Pacatuba, Caracanga, Sítio Cajazeiras , 11. V.1986, (P. M. B. Carvalho), J. R. I. Ribeiro det. 1999. Mato Grosso do Sul — 1 m / 2 f ( DPIC 567 ): Corumbá, 17.XI.1992, ( Fabiana [?] and T. P. S. Sereno), J. R. I. Ribeiro det. 1999. Minas Gerais — 1 m ( DPIC 461 ): Belo Horizonte , [without date], (A. L. Melo), A. L. Melo det. , [reared in laboratory]. 1 m ( DPIC 1331 ): Calceolândia , II.1990, (A. L. Melo), A. L. Melo det. 1 m ( DPIC 209 ): Lagoa Santa , [without date], (A. L. Melo), A. L. Melo det. 1 m ( DPIC 409 ): same. 1 f ( DPIC 210 ): same, [reared in laboratory] . 1 m ( DPIC 1618 ): same, Olhos d’Água Lake , XII.1990, (M. H. Pereira), J. R. I. Ribeiro det. 1999. 1 m ( DPIC 1620 ): same, [without date], (M. H. Pereira ), J. R. I. Ribeiro det. 1999. 1 m ( DPIC 1606 ): same, XII.1990, (M. H. Pereira), J. R. I. Ribeiro det. 1999. 1 m ( DPIC 1607 ): same, 22.IX.1988, (M. H. Pereira), J. R. I. Ribeiro det. 1999. 1 m ( DPIC 1249 ): Januária , 23.XI.1997, (A. L. Melo), J. R. I. Ribeiro det. 1999. São Paulo — 1 f ( MZSP 70.032 ): Tietê River , VIII.1996, ([?] Bicego), J. A. de Carlo det. 1 m / 1 f ( MZSP): Ribeirão Preto, “ Fac. Medicina ”, XI.1954, ([?] Barretto), J. R. I. Ribeiro det. 1999, M. P. Barretto’s collection, 1969. 1 m ( SEMC): [without a more precise locality and date], (E. D. Tacwnsend), J. R. I. Ribeiro det. 1999. 1 f ( SEMC 326 ): same, A. L. Montandon det. 1914, D. R. Lauck det. 1959. 2 m ( MNRJ 85 ): São José dos Campos ; XII.1934, (H. S. Lopes), J. A. de Carlo det. 1 f ( MACN 39316 ): [without a more precise locality and date], [illegible collector], J. A. de Carlo det. 1 m ( MACN 39316 ): [without a more precise locality], VIII.1960, [illegible collector], J. A. de Carlo det. 1 f ( MACN 39316 ): same, I.1907, [illegible collector], J. A. de Carlo det.

Distribution.— ARGENTINA ( De Carlo 1938). BRAZIL: Ceará ( Ribeiro 2000), Mato Grosso do Sul ( Ribeiro 2000), Minas Gerais ( De Carlo 1938), Pará ( Lauck 1962), Rio de Janeiro ( De Carlo 1938), São Paulo ( De Carlo 1938). FRENCH GUYANA: Cayenne ( Mayr 1871). PARAGUAY ( De Carlo 1938).

Description.—Measurements (m / f). Total length (from apex of head to apex of hemelytra at rest) 40.25– 44.9 / 36.8–45.5; largest width of body 15.0–19.5 / 15.6–18.7; median length of pronotum 6.16–8.08 / 6.32– 8.00; greatest pronotal width 11.06–14.48 / 11.84–14.24.

General coloration nearly uniformly brown, occasionally suffused with yellowish brown. Pronotum occasionally with two yellowish longitudinal stripes parallel to lateral borders.

Body elongate and ellipsoid. Length of anteoculus 0.94–1.14 times length of interoculus; length of segment I of rostrum 1.08–1.29 times length of segment II; anterior frontogenal suture equal to or longer than posterior frontogenal suture; clypeus reaching or nearly reaching ocular line (0–0,24 mm); vertex without longitudinal median carina; posterior interocular width 1.06–1.35 times width of eye, distinctly wider than length of anteoculus (1.05–1.24 times); eyes rounded. Pronotum without longitudinal median carina; greatest pronotal width 1.73–1.89 times its length; scutellum reaching nodal line, without longitudinal median carina; prosternal keel somewhat rounded ( Fig. 8A ). Pilosity not extending along genital operculum, covering part of connexivum.

Male genitalia ( Fig. 8C–E ).—Dorsal arms slightly broader at middle, not narrowing gradually toward apex in dorsal view; ventral diverticulum with dorsal caudal protuberance in dorsal and lateral views, and with very large, distinct ventroapical protuberance in lateral and ventral views; caudal lateral margins of ventral diverticulum sinuous instead of convex in ventral view; width equal to length of ventral diverticulum in ventral view.

Variation.—I have seen two specimens from the State of São Paulo, whose total length and genitalia are relatively larger than those of other specimens examined, but which still possesses distinct protuberances. However, the dorsal arms are slightly broad basally, narrowing gradually apically in dorsal view. The caudal lateral margins of the ventral diverticulum are not sinuous but convex ( Fig. 8B, F–H ) .

Comparative notes.— Belostoma foveolatum can be distinguished from B. elongatum Montandon, 1908 by the length: width ratio of the diverticulum in ventral view, which is about 1.3 in B. elongatum and one time in B. foveolatum ( Ribeiro 2000) . Belostoma foveolatum can be distinguished from the remaining species of the B. dentatum group by the length of segment I of the rostrum and features of the male genitalia.

Figures

FIGURE 8. Belostoma foveolatum (Mayr, 1863). 8A–B, Prosternal keel (lateral view): 8A, Specimen from State of São Paulo (MACN 39316). 8B, Specimen from State of São Paulo (MNRJ 85). 8C–H, Phallus: 8C–E, Specimen from State of Minas Gerais (DPIC 461). 8F–H, Specimen from State of São Paulo (MNRJ 85). 8C and 8F, Dorsal views. 8D and 8G, Ventral views. 8E and 8H, Lateral views. Scale bar: 1.00 mm.

FIGURE 19. Dorsal habitus. 19A, Belostoma elongatum Montandon, 1908: specimen from State of Mato Grosso (MNRJ 96). 19B, B. foveolatum (Mayr, 1863): specimen from State of São Paulo (MNRJ 85). 19C, B. horvathi Montandon, 1903: specimen from State of Rio de Janeiro (DZRJ 18). 19D, B. micantulum (Stål, 1860): specimen from State of Amazonas (INPA 0021057). Scale bar: 5.00 mm.

FIGURE 24. Geographic distribution map of Belostoma species in southeastern Brazil. 24A, = B. foveolatum, = B. horvathi. 24B, = B. plebejum, = B. ribeiroi, = B. sanctulum.