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Anais da Sociedade Entomológica do Brasil

Print version ISSN 0301-8059

An. Soc. Entomol. Bras. vol.29 no.3 Londrina Sept. 2000

http://dx.doi.org/10.1590/S0301-80592000000300010 

SYSTEMATICS, MORPHOLOGY AND PHYSIOLOGY

 

Revision of Cataulax Spinola, with Architas Distant as a new synonymy (Heteroptera: Pentatomidae: Discocephalini)1

 

Revisão de Cataulax Spinola, com Architas Distant como nova sinonimia (Heteroptera: Pentatomidae: Discocephalini)

 

 

Jocélia GraziaI,2; Luiz A. CamposI; Miriam BeckerI,2

IDepartamento de Zoologia, Universidade Federal do Rio Grande do Sul, Av. Paulo Gama s/n, 90046-900, Porto Alegre, RS, Brasil. E-mail: jocelia@vortex.ufrgs.br

 

 


ABSTRACT

Five species are here recognized for the genus Cataulax Spinola, 1837: Cataulax eximius (Stål, 1860), Cataulax froeschneri, n. sp., Cataulax pudens (Distant 1889), Cataulax radians, n. sp. and Cataulax subtiliterconspersus, n. sp. Cataulax pudens is transferred from Architas Distant, 1889, here considered a junior synonym of Cataulax. Cataulax annulicornis Walker, 1868, Cataulax punctipes Walker, 1868 and Cataulax subvittatus Walker, 1868 are considered incertae sedis.

Key words: Insecta, Discocephalinae, new species, taxonomy.


RESUMO

Cinco espécies são reconhecidas para o gênero Cataulax Spinola, 1837: Cataulax eximius (Stål, 1860), Cataulax froeschneri, sp. n., Cataulax pudens (Distant, 1889), Cataulax radians, sp. n. e Cataulax subtiliterconspersus sp. n. Cataulax pudens é transferida de Architas Distant, 1889, aqui considerado sinônimo júnior de Cataulax. Cataulax annulicornis Walker, 1868, Cataulax punctipes Walker, 1868 e Cataulax subvittatus Walker, 1868 são consideradas incertae sedis.

Palavras-chave: Insecta, Discocephalinae, espécie nova, taxonomia.


 

 

The genus Cataulax was described by Spinola (1837). So far, the species belonging to Cataulax have been known only from the original descriptions except for Stål's (1872) comments on Cataulax eximius Walker, 1868 and Cataulax subvittatus Walker, 1868 but he did not mention the remaining species described by Walker (1868), Cataulax annulicornis and Cataulax punctipes. Lethierry & Severin (1893) listed C. eximius, C. subvittatus, C. annulicornis, C. punctipes and Cataulax decoloratus Walker, 1868 in their catalogue. Besides the species cited in Lethierry & Severin's (1893) catalogue, except C. decoloratus, Kirkaldy (1909) added Cataulax varicornis (Walker, 1867) in his catalogue.

Stål (1860) described the genus Hypata for Hypata eximia, from Rio de Janeiro, Brazil. Stål (1872) pointed out Hypata as a junior synonym of Cataulax.

The genus Architas was described by Distant (1889) for Architas pudens, from Panama. The original description remained so far the only reference to it, except for its inclusion in Kirkaldy's (1909) catalogue.

Distant (1899) considered C. decoloratus Walker, 1868 a junior synonym of Pentatoma varicornis Walker, 1867 which he transferred to Cataulax. Ruckes (manuscript) considered these species congeneric with Ablaptus Stål, 1864. A note concerning these species can be found in Becker & Grazia (1997).

The remaining species described by Walker (1868) for this genus such as C. punctipes, C. annulicornis and C. subvittatus were considered here as incertae sedis. According to the original descriptions the types of the first two species were deposited in the "National Museum at Melbourne", and the type of the third species in the "British Museum (Bates Collection)". The types of C. annulicornis and C. punctipes were not found at the Museum of Victoria (formerly National Museum of Victoria) according to the information of Ms. Catriona McPhee, Assistant Curator, Entomology. The type of C. subvittatus was not found at the National Museum, London, according to Mrs. Janet Margerison-Knight, formerly Curator of the collection. Furthermore, Walker's descriptions of these species do not permit to place them correctly.

 

Material and Methods

For the revision of the genus Cataulax the authors had the opportunity to study a fairly large sample of specimens obtained from entomological collections of Brazil and abroad, as follows: American Museum of Natural History, New York, USA (AMNH); California Academy of Sciences, San Francisco, USA (CAS); Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil (DZRS); Fundação Instituto Oswaldo Cruz, Rio de Janeiro, Brazil (IOC); Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil (INPA); Museo de Historia Natural La Salle, Caracas, Venezuela, (MHNC); Museu Nacional, Rio de Janeiro, Brazil (MNRJ); Museu Paraense Emilio Goeldi, Belém, Brazil, (MPEG); Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil (MZSP); Museu de Zoologia J. S. Moure, Universidade Federal do Paraná, Brazil (UFPR); National Museum of Natural History, Washington D.C., USA (USNM); National Museum of Natural History, London, England (BMNH).

Measurements are given in millimeters, and were obtained as in Becker & Grazia (1989). The pygophores, and females genital plates were illustrated in dry condition; phallus, and females ectodermal genital ducts were studied after boiling in KOH 10% and staining in Congo Red. The terminology of Dupuis (1970) is adopted for genital structures.

 

Results and Discussion

Cataulax Spinola, 1837

Cataulax Spinola, 1837: 339; Dallas, 1851: 16; Stål, 1867: 500; Lethierry & Severin, 1893: 85; Kirkaldy, 1909: 216.

Hypata Stål, 1860 : 15

Architas Distant, 1889: 323. NEW SYNONYMY

Type species: Cataulax eximius (Stål)

Diagnosis. Obovate; mesosternum tumid, in a median, elevated, broad calloused ridge; metasternum hexagonal, elevated into a thicket plate, apical margin emarginate; third abdominal segment with a median, flat tubercle which fits in apical emargination of the metasternum; rostrum with a minute intercalary segment between basal two segments.

Obovate; rather large, distinctly convex above, mildly so beneath; glossy to semiglossy; head and anterior portion of the pronotum distinctly declivitous. Head shorter than the median pronotal length, roundly triangular about twice wide through eyes than long, anteocular margins feebly sinuate, jugae longer than clypeus and slightly overlapping apically, the apex rounded, entire. Antennae five segmented, thin, reaching, at least, basal third of scutellum. Pronotal transversely hexagonal, anterior margin no wider than head through the eyes; anterolateral margins straight, subcarinate, and very narrowly reflected; a minute, acute, anterior apical denticle on each side. Humeral angles obtusely rounded. Scutellum quite prominent attaining, at least, the seventh abdominal tergite; frena end at middle, margins mildly sinuate there. Hemelytra reaching the end of abdomen, corium subequal to, or slightly longer than scutellum; apical margin of membrane truncate in males, veins of membrane slightly raised, subparalell or convergent posteriorly. Connexivum narrowly exposed, apical angles rectilinear to subacute and very feebly produced. Bucculae feebly elevated, uniform in height, parallel; buccular canal relatively broad and shallow. Rostrum reaching beyond metacoxae, provided with a minute intercalary segment between the basal two segments; segment II arcuate, subequal to or slightly shorter than segments III and IV combined. Mesosternum distinctly tumid, its median area elevated into a thick, posteriorly widening, calloused ridge anteriorly convex, except in C. eximius. Metasternum hexagonal, slightly elevated into a flattish calloused plate, posterior margin excavated. Mesocoxae slightly more widely separated transversely than they are from each other longitudinally. Ostiolar peritreme barely elevated, attenuating laterally into a long, thin, thread-like ruga nearly reaching lateral margin of plate. Third abdominal sternite with a median broad and flat tubercle that fits into emargination of metasternum. Median abdominal furrow broad and shallow, reaching sixth sternite; small calloused yellow tubercles next to spiracles. Legs moderate in size, tibiae planosulcate above, terminal tarsal segment subequal in length to basal two combined; femora and tibiae with numerous, widely spaced castaneous dots.

Male. Pygophore with postero-lateral angles expanded; internal borders of postero-lateral angles ending either in a lobe or in a denticle. Parameres stout, erect, simple or with branches. Proctiger opening ventrally; middle length with 1+1 process or carina convergent posteriorly. Phallus: articulatory apparatus with two pairs of dorsal connectives. Vesica with 1+1 or 2+2 dorsal basal processes. Conjunctiva present, with a 1+1 ventral, auricular process.

Female. Genital plates simple, smooth, much wider than long when taken together. Ectodermal genital ducts simple, chitinellipsen present.

Comments. Differential characters used by Distant (1889) to create the genus Architas are relatively minor, and, vary between species. Most of the characters conform to the requirements of the genus Cataulax, specially the genitalia of both sexes. The genera related to Cataulax have already been studied by the authors: Sympiezorhincus Spinola, 1837 was revised by Becker & Ruckes (1969), Ablaptus Stål, 1864 by Becker & Grazia (1989), Agaclitus Stål, 1864 by Becker & Grazia (1992) and Uncinala Ruckes, 1965 by Becker & Grazia (1995). The relationships among these genera can be found in these papers, and are extensively discussed in Becker & Grazia (1989, 1992). This is the first time that Cataulax is brought into the vicinity of these genera.

Key to the species of Cataulax

1.Scutellum uniformly finely and densely punctured ....... subtiliterconspersus n. sp.
Scutellum with punctures not uniform in size, distributed in lines or patches ........... 2

2.Posterior margin of metasternum almost twice larger than anterior margin; median mesosternal plate almost flat ..................................................... eximius (Stål)
Posterior margin of metasternum almost as wide as anterior margin; median mesosternal plate conspicuously convex anteriorly ............................................ 3

3. Parameres with lobes and spines (Figs. 3B, 4B, 5B) ................ froeschneri n. sp.
Parameres simple ........................................................................................ 4

4. Internal border of postero-lateral angles of pygophore with a lobe in a percurrent flange (Fig. 3C) ................................................................... pudens (Distant)
Internal border of postero-lateral angles of pygophore with an obsolete denticle ............................................................................................... radians n. sp.

 

 

 

 

 

 

 

 

 

 

 

Cataulax eximius (Stål, 1860)
(Figs. 1, 2A, 3A, 4A, 5A, 6A-C, 7A, 8A)

 

 

 

 

 

 

Cataulax macraspis Spinola, 1837: 339 (not Perty); Dallas, 1851: 269.

Hypata eximia Stål, 1860: 16.

Cataulax eximius: Stål, 1872: 7; Lethierry & Severin, 1893: 85; Kirkaldy, 1909: 216.

Relatively large species; three to five pale, laevigate, longitudinal lines on head, intercalated with four subparallel rows of fine piceous punctures; eight small clusters of piceous punctures on pronotum, two at each humerus and four across crest of the disc, and three, more or less parallel longitudinal lines of fine punctures on exocorium, endocorium with patches of punctures (Fig. 1).

External apical angle of corium distinctly exceeding rounded apex of scutellum, clearly attaining or barely surpassing apical margin of the seventh tergite. Rostrum almost attaining apical margin of fifth sternite. Apical margin of metasternum broadly and shallowly sinuate, median abdominal tubercle correspondingly obtuse and broad.

Male. Apical margin of membrane straight, three or four external veins of membrane subparalell, not convergent towards apical margin (Fig. 2A).

Measurements (mm). Length of head 2.29(2.13-2.46); anteocular length 1.47(1.31-1.64); width of head 4.03(3.77-4.10); interocular width 2.62(2.46-2.68); interocelar width 1.18(1.14-1.31); length of antennal segments: I 0.85(0.82-0.98), II 1.50(1.31-1.64), III 1.70(1.64-1.80), IV 2.25(2.13-2.29), V 2.29; pronotal length 3.44(3.28-3.60); pronotal width 8.29(7.70-8.69); length of scutellum 7.54(7.05-8.03); width of scutellum 5.47(5.08-5.74); abdominal width 8.33(7.87-8.69); total length 13.28(12.79-13.61).

Postero-lateral angles of pygophore somewhat extended outwards, internal border carinate ventrally, denticle obvious. Parameres erect, spatulate, with strong ridges along external borders, obliquely truncate at apex surpassing postero-lateral angles of pygophore. Proctiger with 1+1 lateral process, at mid length, anteriorly directed. (Figs. 3A, 4A, 5A). Phallus: articulatory apparatus slender, basal plates narrow, ponticulus transversalis large, expanded, membranous; processus capitati not developed. Vesica with 2+2 dorsal processes, the basal one as a mere projection, the second one forming arms embracing free portion of ductus seminis distalis (Fig. 6A-C).

Female. Measurements (mm). Length of head 2.39(2.29-2.46); anteocular length 1.50(1.47-1.64); width of head 4.03(3.93-4.01); interocular width 2.55(2.46-2.62); interocelar width 1.24(1.14-1.31); length of antennal segments: I 0.98, II 1.44(1.31-1.64), III 1.73(1.64-1.80), IV 2.32(2.29-2.46), V 2.37(2.29-2.46); pronotal length 3.57(3.44-3.77); pronotal width 8.49(8.03-8.85); length of scutellum 7.57(7.21-8.03); width of scutellum 5.57(5.08-5.74); abdominal width 8.42(8.03-8,69); total length 13.51(12.95-13.77).

Gonocoxites 8 much wider than long, sutural borders rectilinear, adjoining each other; distal border smoothly rounded. Laterotergites 9 simple not surpassing transverse band connecting laterotergites 8 dorsally. Posterior border of laterotergites 8 smoothly rounded (Fig. 7A). Esclerotized area of gonocoxites 9 thin, almost inconspicuous, limits between gonocoxites 9 and gonapophyses 9 not clear. Orificium receptaculi surrounded by a conical, simple thickening of vaginal intima, chitinellipsen at each side of its base. Capsula seminalis simple, globose (Fig. 8A).

Type. Female deposited at Natural History Museum, Stokholm.

Material Examined. Brazil: Minas Gerais: male, female, Pedra Azul, I/1971, F. M. Oliveira (AMNH); female, Cambuquira, II/1942, H. S. Lopes (IOC); Espírito Santo: male, Guarapari, XI/1961, M. Alvarenga (UFPR); female, Santa Teresa, XII/03/1964, C. Elias (UFPR); Rio de Janeiro: male, Manguinhos, Rio de Janeiro, XII/20/1913, A. Lutz (IOC); female, Rio de Janeiro, 1936 (DZRS); male, Corcovado, idem, 1954, Zajciv (MNRJ); female, idem, XI/25/1952, idem; female, idem, VIII/1965, Alvarenga & Seabra (IOC); female, Japuhyba, Angra dos Reis, IV/17/1942, H. Travassos, (MCN 1709); female, Serra de Petrópolis, II/1933 L. Travassos (DZRS); male, Tinguá, Nova Iguaçu, XII/01/1959, J. Evang. (DZRS); male, Conceição do Macabú, IX/1978, M. Alvarenga (DZRS); male, Represa Rio Grande, I/1972, M. Alvarenga & F. M. Oliveira (AMNH); male, idem [Guanabara], vii-ix/1969, F. M. Oliveira (AMNH) male, female, idem, III/02/1967, M. Oliveira (UFPR); São Paulo: female, Ilha de São Sebastião, I/1959 (DZRS); female, Ilha dos Búzios X/16-XI/4/1963, Exp. Dep. Zool. (MZSP); Paraná: female, Morretes [IAPAR], I/06/185, CIIF [light], (UFPR); female, Antonina, Reserva Sapitanduva, X/31/1986, PROFAUPAR [light] (UFPR); Santa Catarina: male, Joinville, VIII/1956, Dirings (MCN1706); female, Corupá, XII/1953, A. Maller (DZRS); female, idem, III/1956, A. Maller (UFPR); male, no data.

Comments. This species is the largest one and as C. froeschneri and C. subtiliterconspersus has lobed and spined parameres. It can be distinguished from them by the pattern of the membrane venation; in the last two species three or four external veins are convergent to a darker peg.

Cataulax froeschneri, n. sp.
(Figs. 2B, 3B, 4B, 5B)

Obovate, glossy above, semiglossy to matter beneath. Punctures fuscous to ferruginous, coarser above.

Head with punctures along 2+2 longitudinal bands, one bordering the jugae, another internal, partially covering clypeus. Pronotum with six, posteriorly divergent, bands of fuscous punctures, much as in C. radians, the two inner bands continuous with ones on head, emphasizing radiating pattern; a single row of fuscous punctures just inside the narrowly carinate anterolateral margin; many fine ferruginous punctures interspersed with coarser fuscous ones. Punctures of scutellum fuscous and irregularly distributed, not arranged in bands, along basal portion forming four darker patches. Hemelytra densely punctured with two oblique clusters of denser punctures on endocorium; punctures on exocorium arranged in three, parallel, longitudinal lines, with intervening, narrow laevigate bands, much as in C. eximius. Apex of scutellum subtriangular. Punctures of connexivum arranged in two vague longitudinal rows intercalated by a narrow laevigate band; antero-lateral angles of segments narrowly infuscated. Rostrum surpassing middle of fourth abdominal sternite. Median mesosternal plate conspicuously convex anteriorly. Posterior margin of metasternum almost as wide as anterior margin. Median abdominal furrow very shallow.

Male. Apical margin of membrane distinctly sinuate at middle, with a short transversal submarginal sulcus; four external veins convergent to a darker peg external to the sulcus (Fig. 2B).

Measurements (mm). Length of head 1.96; anteocular length 1.31; width of head 3.60; interocular width 2.29; interocelar width 1.14; length of antennal segments: I 0.65, II 1.31, III 1.31, IV 2.13, V 2,13; pronotal length 2.62; pronotal width 7.54; length of scutellum 6.72; width of scutellum 5.41; abdominal width 7.05; total length 11.97.

Lobe of internal border of postero-lateral angles of pygophore well produced. Proctiger with 1+1 carina at mid length, converging posteriorly. Parameres three branched, the external one, the smallest, acute; internal one curved over proctiger; distal one, the largest, flaplike (Figs. 3B, 4B, 5B).

Female. unknown.

Type-material. Holotype male, Brazil, Mato Grosso, Cáceres IV/03/1985, C. Elias leg. (UFPR).

Etymology. This species is dedicated to Dr. Richard C. Froeschner for his contribution to the knowledge of the Heteroptera.

Comments. By the structure of the parameres and the pattern of the membrane venation this species is similar to C. subtiliterconspersus; the presence of bands of fuscous punctures on head and pronotum and arranged in four darkest patches along basal portion of scutellum distinguish C. froeschneri from C. subtiliterconspersus in which the punctures do not form bands or patches.

Cataulax pudens (Distant, 1889)
(Figs. 2C, 3C, 4C, 5C, 6D-F, 7B, 8B)

Architas pudens Distant, 1889: 323; Lethierry & Severin, 1893: 85; Kirkaldy, 1909: 216. NEW COMBINATION

Distinctly shorter, and less densely punctured than in C. eximius, but sometimes punctuation is arranged in longitudinal lines or in patches as in that species. Apex of scutellum subtriangular. Corium hardly longer than scutellum. Rostrum clearly surpassing the middle of the fourth abdominal sternite. Posterior margin of metasternum almost as wide as anterior margin; median mesosternal plate conspicuously convex anteriorly.

Male. Apical margin of hemelytral membrane slightly truncate and feebly sinuate, veins subparalell, ending well before apical margin (Fig. 2C).

Measurements (mm). Length of head1.84(1.80-1.96); anteocular length 1.22(1.14-1.31); width of head 3.68(3.60-3.77); interocular width 2.12(1.96-2.29); interocelar width 1.06(0.98-1.14); length of antennal segments: I 0.65, II 1.26(1.14-1.31), III 1.26(1.14-1.31), IV 1.88(1.80-1.96), V 1.96; pronotal length 3.03(2.95-3.11); pronotal width 7.54(7.38-7.70); length of scutellum 6.59(6.39-6.88); width of scutellum 5.08; abdominal width 7.21(7.05-7.38); total length 11.43(11.15-12.13).

Pygophore sub-rectangular; lobe of internal border of postero-lateral angles in a percurrent flange. Parameres simple, depressed, elongate-oval in outline (Figs. 3C, 4C, 5C). Proctiger with 1+1 carina at mid length, converging posteriorly. Phallus: articulatory apparatus stout, wider than phallotheca; processus capitati slender. Vesica with 1+1 dorsal process at base, processus vesicae shallow, collar like; ductus seminis distalis totally included in vesica (Figs. 6D-F).

Female. Measurements (mm). Length of head 2.18(1.96-2.29); anteocular length 1.26(1.14-1.31); width of head 3,83(3.60-4.10); interocular width 2.36(2.29-2.46); interocelar width 1.23(1.14-1.39); length of antennal segments: I 0.65, II 1.44(1.31-1.47), III 1.27(1.14-1.31), IV 2.07(1.88-2.29), V 2.00(1.88-2.13); pronotal length 3.37(3.11-3.60); pronotal width 7.79(7.38-8.20); length of scutellum 6.75(6.39-7.05); width of scutellum 5.05(4.92-5.24); abdominal width 7.38(6.72-8.03); total length 12.59(11.80-13.61).

Gonocoxites 8 wider than long, sutural borders rectilinear, adjoining each other; distal border angulate. Laterotergites 9 simple, just surpassing transverse band connecting laterotergites 8 dorsally. Posterior borders of laterotergites 8 smoothly rounded (Fig. 7B). Anterior border of gonocoxites 9 concave, posterior border almost rectilinear; gonapophyses 9 with 1+1 thickenings near anterior limits. Orificium receptaculi surrounded by a conical, simple thickening of vaginal intima, chitinellipsen at each side of its base. Capsula seminalis simple, globose (Fig. 8B).

Type. Holotype female deposited at BMNH examined. Type locality: Volcan de Chiriqui, 2-3000ft, Panamá.

Material Examined. Panama: Canal Zone: male, female, Barro Colorado Island, V/24/1957, F. Schrader (AMNH); male, female, idem, IV/24/1962, H. Ruckes (AMNH); female, idem, VII/18/1956, C. W. & M. E. Rettenmeyer (SEM); female, idem, V/10-17/1964, WD & SS Duckworth (USNM); San Jose: male, Pearl Island, V/25/1944, Morrison JPE, collected at light (USNM); Porto Belo: female, IV/17/1912 (AMNH); Gatum Lake: male, Tres Rios Plantation, IX/04/1931, TOZschokke, E. P. Van Duzee Collection (AMNH); Venezuela: Zulia: female, Caimera, Sierra de Perija, IV/11/1960 (MHNS).

Comments. Similar to C. radians by having simple parameres and membrane with subparalell veins ending well before apical margin. In C. pudens the apical margin of hemelytral membrane is slightly truncate and feebly sinuate but in C. radians it is straight.

Cataulax radians, n. sp.
(Figs. 2D, 3D, 4D, 5D)

Obovate, glossy above, semiglossy to matter beneath; reddish fulvous; punctures fuscous to ferruginous, coarser above.

Distribution of the punctures on head, pronotum and hemelytra as in C. froeschneri. Antennae missing. Apex of scutellum narrowly rounded (not subtriangular); punctures fuscous and arranged in four vague, subparalell, longitudinal bands, which are evanescent posteriorly; central basal portion of disc obsolescently punctured. Corium hardly exceeding scutellum; membrane clear amber, with a large darker basal spot, veins brownish. Connexivum orange-ochraceous, punctures arranged in two longitudinal rows, a marginal one and a submarginal one with a narrow laevigate band between them; basal angles of segments narrowly and vaguely infuscated. Rostrum reaching middle of fourth abdominal sternite. Median mesosternal plate quite broad, conspicuously convex anteriorly. Posterior margin of metasternum almost as wide as anterior margin, obtusely sinuate, abdominal tubercle stout, obtuse. Median abdominal furrow very shallow.

Male. Apical margin of hemelytral membrane straight, veins subparalell ending well before apical margin. Apical margin of the seventh sternite shallowly and evenly arcuate across the width, less esclorotized there (Fig. 2D).

Measurements (mm). Length of head 1.64; anteocular length 1.14; width of head 3.28; interocular width 1.96; interocelar width 0,98; length of antennal segments: I 0.65, II-V missing; pronotal length 2.62; pronotal width 6.72; length of scutellum 5.74; width of scutellum 4.59; abdominal width 6.39; total length 10.66.

Cup-like part of pygophore wider than long. Postero-lateral angles directed outwards, concave along its inner surface, denticle of internal border obsolete. Proctiger with 1+1 carina at mid length, converging posteriorly. Parameres spatulate, simple, external apex notched (Figs. 3D, 4D, 5D).

Female: unknown.

Type-material. Holotype male, PERU, Rio Santiago, XI/23/1924, H. Bassler (AMNH).

Comments. Similar to C. eximius, C. pudens and C. froeschneri by the pattern of dorsal punctures forming bands and patches; it can be distinguished from them by the size, being the smallest one.

Cataulax subtiliterconspersus n. sp.
(Figs. 2E, 3E, 4E, 5E, 6G-I, 7C, 8C)

Obovate, glossy, finely and densely punctured dorsad; punctures fuscous, vaguely arranged in lines. Shorter than C. eximius.

Scutellum with apex subtriangular, punctures uniformly distributed, not arranged in patches or lines. Corium hardly exceeding scutellum; membrane clear amber, with a darker basal spot, veins a little darker. Connexivum with a vague submarginal line of punctures; antero-lateral angles with darker punctures. Rostrum apparently attaining posterior margin of fourth abdominal sternite. Median mesosternal plate conspicuously convex anteriorly. Posterior margin of metasternum almost as wide as anterior margin. Median abdominal furrow shallow.

Male. Apical margin of membrane subtruncate, very feebly sinuate, three or four external veins convergent to an inconspicuous submarginal peg (Fig. 2E).

Measurements (mm). Length of head (1.80-2.13); anteocular length 1.31; width of head (3.6-4.1); interocular width 2.29; interocelar width 1.14; length of antennal segments: I 0.65, II 1.31, III 1.31, IV 1.96, V missing; pronotal length (2.78-3.11); pronotal width (7.38-7.70); length of scutellum (6.23-7.05); width of scutellum (4.75-5.41); abdominal width (6.88-7.21); total length (11.80-12.46).

Pygophore subrectangular. Denticle of internal border of postero-lateral angles large triangular. Three branches of paramere flaplike, the distal one at right angles with the external and internal ones (Figs. 3E, 4E, 5E). Carina of proctiger inconspicuous. Phallus: articulatory apparatus robust, expanded dorsad, ponticulus transversalis large; processus capitati slender. Vesica with 1+1 dorsal process at base, processus vesicae wide, collar like; ductus seminis distalis included in vesica. (Figs. 6G-I).

Female. Measurements (mm). Length of head (2.29-2.37); anteocular length (1.14-1.39); width of head (3.77-4.10); interocular width (2.29-2.46); interocelar width (1.14-1.55); length of antennal segments: I 0.65, II (1.47-1.64), III 1.31, IV (2.13-2.29), V 2.21; pronotal length (3.28-3.44); pronotal width (7.70-8.20); length of scutellum (6.23-6.88); width of scutellum (5.08-5.41); abdominal width 6.88; total length (12.78-13.28).

Gonocoxites 8 not much wider than long, sutural borders rectilinear, adjoining each other except at base; distal border almost rectilinear. Laterotergites 9 simple, not reaching transverse band connecting laterotergites 8 dorsally. Posterior borders of laterotergites 8 smoothly rounded (Fig. 7C). Esclerotized area of gonocoxites 9 thin, almost inconspicuous, limits between gonocoxites 9 and gonapophyses 9 not clear. Orificium receptaculi surrounded by a conical, simple thickening of vaginal intima, chitinellipsen at each side of its base. Capsula seminalis simple, globose (Fig. 8C).

Type-material. Holotype male Brazil, Roraima, Rio Uraricoera, Ilha Maracá, XI/20-30/1987, J. A. Rafael, fogging (INPA). Paratypes: French Guyana: Cayenne male, E. P. Van Duzee Collection (CAS). Brazil: Pará: female, Tucuruí, Rio Trombetas, Ilha Tocantins, VII/31/1984, B. Mascarenhas (MPEG); Amazonas: female, Manaus, III-IV/1976, Montouchet & Burheim (DZRS).

Comments. This species can be distinguished from all others by the pattern of dorsal punctures.

Incertae Sedis

Cataulax annulicornis Walker, 1868

Cataulax annulicornis Walker, 1868: 564; Lethierry & Severin, 1893: 85; Kirkaldy, 1909: 216.

Cataulax punctipes Walker, 1868

Cataulax punctipes Walker, 1868: 565; Lethierry & Severin, 1893: 85; Kirkaldy, 1909: 216.

Cataulax subvittatus Walker, 1868

Cataulax subvittatus Walker, 1868: 564; Stål, 1872: 7; Lethierry & Severin, 1893: 85; Kirkaldy, 1909: 216.

 

Acknowledgments

To Drs. R. T. Schuh (AMNH), N. Penny (CAS), J. Jurberg (IOC), V. Py-Daniel (INPA), E. Osuna (MHNC), S. Harada (MPEG), U. Martins (MZSP), K. Zanol (UFPR), R. Froeschner and T. Henry (USNM) and J. Margerison-Knight (BMNH) for the loan of the types and specimens studied in this paper. Also to Dr. G. Cassis (Australian Museum) and Ms. C. McPhee (Museum of Victoria) for information concerning Walkers' types.

 

Literature Cited

Becker, M. & H. Ruckes. 1969. A review of the genus Sympiezorhinchus Spinola (Heteroptera: Pentatomidae: Discoce- phalinae). Am. Mus. Novit. 2391: 1-17.        [ Links ]

Becker, M. & J. Grazia. 1989. Novas contribuições ao gênero Ablaptus Stål, 1864. (Heteroptera: Pentatomidae: Discocephalinae). Mems Inst. O. Cruz 84: 57-68.        [ Links ]

Becker, M. & J. Grazia. 1992. Revisão do gênero Agaclitus Stål (Heteroptera, Pentatomidae, Discocephalinae). Rev. Bras. Entomol. 36: 831-842.        [ Links ]

Becker, M. & J. Grazia. 1995. The bug genus Uncinala Ruckes, 1965 (Heteroptera, Pentatomidae, Discocephalinae). Rev. Bras. Entomol. 39: 709-716.        [ Links ]

Becker, M. & J. Grazia. 1997. A new combination and a new synonymy in Discocephalini (Heteroptera: Pentato- midae). Rev. Bras. Zool. 14: 319-321.        [ Links ]

Dallas, W.S. 1851. List of the specimens of hemipterous insects in the collection of the British Museum. London, 368 p.        [ Links ]

Distant, W.L. 1889. Insecta, Rhynchota l, xx + 462p. In: F.C. Godman & O. Salvin (eds.), Biologia Centrali Americana. London.        [ Links ]

Distant, W.L. 1899. Rhynchotal Notes III. Heteroptera: Discocephalinae and Pentatominae (part). Ann. Mag. Nat. Hist. 4: 421-445.        [ Links ]

Dupuis, C. 1970. Heteroptera, p. 190-208. In S.L. Tuxen (ed.), Taxonomist's Glossary of Genitalia of Insects. Copenhagen, Munskgaard, 359p.        [ Links ]

Kirkaldy, G.W. 1909. Catalogue of the Hemiptera (Heteroptera) 1. Cimicidae. Berlim, Felix L. Dames, 392 p.        [ Links ]

Lethierry, L. & G. Severin. 1893. Catalogue Général des Hémiptères Pentatomidae. Bruxelles, v. 1, x + 286p.        [ Links ]

Spinola, M., 1837. Essai sur les genres d'insectes appartenants à l'ordre des Hémiptères, Lin. ou Rhyngotes, Fab. et à la section des Hétéroptères Dufour. Genova, 383p.        [ Links ]

Stål, C. 1860. Bidrag till Rio de Janeiro traktens Hemipterfauna. K. svenska VetenskAkad Handl. 2: 1-84.        [ Links ]

Stål, C. 1867. Bidrag till Hemipterernas Systematik. Ofvers. K. VetenskAkad Forh. 24: 491-560.        [ Links ]

Stål, C. 1872. Enumeratio Hemipterorum. K. svenska VetenskAkad Handl. 10: 1-159.        [ Links ]

Walker, F. 1867. Catalogue of the specimens of heteropterous Hemiptera in the collection of the British Museum. Part 2. London, British Museum, p. 237-417.        [ Links ]

Walker, F. 1868. Catalogue of the specimens of heteropterous Hemiptera in the collection of the British Museum. Part 3. London, British Museum, p. 418-599.        [ Links ]

 

 

Accepted 30/V/2000.

 

 

1 Contribution # 357 of the Departamento de Zoologia, UFRGS.
2 CNPq fellowship