Brachystethus improvisus Breddin, 1905

Barcellos, Aline & Grazia, Jocélia, 2003, Revision Of Brachystethus (Heteroptera, Pentatomidae, Edessinae), Iheringia, Sér. Zool. 93 (4), pp. 413-446: 438-440

publication ID

http://doi.org/ 10.1590/S0073-47212003000400008

DOI

http://doi.org/10.5281/zenodo.3719827

persistent identifier

http://treatment.plazi.org/id/217887A7-9914-802A-4B25-5CA9FE2D67E9

treatment provided by

Tatiana

scientific name

Brachystethus improvisus Breddin, 1905
status

 

Brachystethus improvisus Breddin, 1905  

( Figs. 12 View Figs , 22, 32 View Figs , 42 View Figs , 51 View Figs , 63 View Figs , 71 View Figs )

Brachystethus improvisus BREDDIN, 1905   :26; BERGROTH, 1908:178; KIRKALDY, 1909:152 (cat.).

Typematerial. Holotype, examined, labeled: a) Esmerala; b) B. improvisus Bredd.   / n. spec. genitalium!; c) coll. Breddin; d) Holotypus; e) DEI Eberswalde; f) 1 HT improvisus ( DEIC). Typelocality, Venezuela   .

Description. Dorsal surface dark-castaneous, with yellow marginal stripe ( fig. 12 View Figs ). Head with coarse punctures moderately distributed and conspicuous wrinkles. Outer margins of jugae with yellow stripe, broader at base. Second antennal segment about one and a halflonger than first, thirdslightly longer than second, fourth a little more than one and a half as long as third and about 3/4 as long as fifth, the longest. Fourth antennal segment cylindrical, lacking sulcus. Pronotum with fine punctures, concentrated before cicatrices, and regularly distributed on the remaining pronotum, interposed with a little coarser, sparse punctures. Scutellum with coarse punctures more frequent at basal 2/3. Corium with a yellowish callus near and entad apex of radial vein. Legs castaneous; coxae, base of trochanters and tibiae, apex of femora and tarsi reddish castaneous to yellowish, in extension variable among the specimens. Ventral surface of thorax with castaneous to black medium-sized punctures. Ostiolar rugae reaching about 2/3 the distance betweeninner margin of ostiolum and lateral margin of metapleura. Metasternal carina strongly elevated anteriorly. Connexivum castaneous to black, with subcaloused yellow stripe ocupying, at least, the outer lateral third of each segment. Punctures fine, more densely distributed entad to this stripe. Venter dark-castaneous, with yellow stripe along lateral margins. Punctures fine, inconspicuous at middle. Spiracles yellowish. Genitalia. Pygophore sub-quadrangular, slightly wider apically. Lobes of dorsal rim conspicuous, strongly projected, rounded at apex. Genital cup processes moderately visible dorsally (figs. 22, 32). Parameres with broad apex, anterolaterally directed ( fig. 51). Ventralrimopenly U-like ( fig. 42).

Measurements (n=10). Headlength 2.09 (1.92-2.32) ± 0.12, width 3.34 (3.16-3.44) ± 0.11; interoculardistance 1.76 (1.68-1.84) ± 0.07; anteocularlength 0.76 (0.72-0.80) ± 0.04; lengthof antennalsegments: I - 1.02 (0.88-1.36) ± 0.13; II - 1.54 (1.36-1.76) ± 0.15; III - 2.06 (1.68-2.48) ± 0.25; IV - 3.31 (2.96-3.60) ± 0.19; V - 4.30 (4.16-4.40) ± 0.12; pronotallength 4.93 (4.51-5.26) ± 0.21, width 11.28 (10.69-12.02) ± 0.52; scutellarlength 7.57 (7.01-8.02) ± 0.35, width 7.13 (6.68-7.68) ± 0.35; coriumlength 10.71 (10.35-11.19) ± 0.26; abdominal width 12.49 (11.36-13.19) ± 0.61; totallength 17.48 (16.37-18.37) ± 0.71.

Female genitalia. Posterior borders of gonocoxites 8 sinuate over laterotergites 9 (fig. 63); sutural borders of gonocoxites 8 parallel. Gonocoxites 9 less than three timesas wide acrossapex of armsthan long inthe middle; anterior border sinuate, little excavated medially. Arms of gonocoxites 9 a little more than 1/5 of plate width. Thickening of vaginal intima digitiform. Ductus receptaculi thin and longer after than before vesicular area. Capsula seminalis ovoid. Annular crests convergent ( fig. 71).

Measurements (n=10). Headlength 2.18 (2.00-2.36) ± 0.12, width 3.47 (3.36-3.60) ± 0.07; interoculardistance 1.82 (1.72-1.92) ± 0.06; anteocularlength 0.79 (0.68-0.88) ± 0.07; lengthof antennalsegments: I - 1.00 (0.80-1.20) ± 0.11; II - 1.67 (1.44-2.08) ± 0.19; III - 1.95

(1.68-2.24) ± 0.18; IV - 3.37 (3.20-3.52) ± 0.14; V - 4.47 (4.08-4.72) ± 0.26; pronotallength 5.19 (4.84-5.51) ± 0.25, width 11.85 (10.86-12.86) ± 0.69; scutellarlength 8.26 (7.68-9.02) ± 0.47, width 7.54 (6.85-8.18) ± 0.42; coriumlength 11.51 (10.86-12.53) ± 0.52; abdominal width 13.20 (12.19-14.20) ± 0.79; totallength 18.72 (17.54-20.21) ± 0.89.

Material examined. GUATEMALA, ( AMNH)   . COSTA RICA, Peralta ,, V.1935 ( BMNH)   ; Guanacaste: Tierras Morenas, Z. P. Tenorio ( Rio San Lorenzo , 1050m),, 10-20.II.1992 ( INBC LN 287800 View Materials , 427600)   ; Puntarenas: Monteverde ,,, 4-6.VI.1980, J.E. Wappes col. ( DARC)   ; A.C. Arenal, Monteverde ( San Luis , 1000-1350m),, I.1994, Z. Fuentes ( INBC LN 449250 View Materials , 250850, 2609)   ; (San Luis, Buen Amigo , 1000-1350m), 2, V.1994, Grace Fuentes ( INBC LN 250850 View Materials , 449250, 2927)   ; R.B. Monteverde ,, 24.VIII-15.IX.1992, F. A. Quesada ( INBC LN 250850 View Materials , 449250)   ; Coto Brus ( Est. Biol. Las Alturas , 1500m),, VIII.1991, M. Ramirez ( INBC LS 822500 View Materials , 591300)   ;, X.1991, M. A. Zumbado ( INBC LS 822500 View Materials , 591300)   ;, I.1992, M. Ramirez, G. Mora, F. Quesada ( INBC LS 822500 View Materials , 591300)   ;, 23.III-2.V.1992, F. Araya ( INBC LS 822500 View Materials , 591300)   . PANAMA, Chiriquí:,, 1898, Coll. Noualhier ( MNHN)   ; Dist. Renacimiento, Santa Clara (4000’),, 10.IX.82, R. Johnson ( AMNH)   ; Fortuna (82 o 15’W 8 o 44’N),, 3.IV.1977, Henk Wolda ( AMNH) GoogleMaps   ; (1050m),, 18.V.1978, O’Brien & Marshall ( AMNH)   ; N. Candelas (4000’),, 24.VIII.82, Stockwell ( AMNH)   ; Trail Fortuna to Soledad ,, 20.V.1978 (s-facing slope) ( AMNH)   ; Repr. La Fortuna ,, 17-21.IX.76, 3200’, D. Engleman ( DARC)   ; Cerro Azul: north of Tocumén ,, 7.VI.1958, W.J. Hanson ( DARC)   . COLOMBIA, Cundinamarca: Bogota ,, Distant Coll. ( BMNH 1911-383)   . BRAZIL, Amazonas: Tefé ( Ega ),, IV.78, I.79, M. de Mathan, Distant Coll. ( BMNH 1911-383)   . BOLIVIA, Santa Cruz: Buena Vista Prov., Tohito (400m),, 1956, Franz Steinbach ( AMNH)   . No data: 2 ( BMNH)   .

Distribution. Guatemala, Costa Rica (Guanacaste, Puntarenas), Panama (Chiriquí, Cerro Azul), Colombia (Cundinamarca), Brazil (Amazonas), Bolivia (Santa Cruz).

Comments. Brachystethus improvisus   is the sister group of B. vicinus   ( BARCELLOS & GRAZIA, 2003), sharing with this species the metasternal carina anteriorly elevated and the anterior margin of gonocoxites 9 sinuate, little excavated, besides the general color and the color pattern of legs. The two species are very similar in general appearance, but can be distinguished by male and female genitalia. B. improvisus   has the dorsal rim of pygophore with conspicuous lobes, genital cup processes moderately visible in dorsal view and parameres broad at apex; on the females, the posterior border of gonocoxites 8 is sinuate over laterotergites 9.

DEIC

Germany, Muencheberg, Deutsches Entomologisches Institut im ZALF

AMNH

USA, New York, New York, American Museum of Natural History

BMNH

United Kingdom, London, The Natural History Museum [formerly British Museum (Natural History)]

INBC

Costa Rica, Santo Domingo de Heredia, Instituto Nacional de Biodiversidad (INBio)

DARC

DARC

LS

United Kingdom, London, Linnean Society

MNHN

France, Paris, Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Pentatomidae

Genus

Brachystethus

Loc

Brachystethus improvisus Breddin, 1905

Barcellos, Aline & Grazia, Jocélia 2003
2003
Loc

Brachystethus improvisus BREDDIN, 1905

KIRKALDY 1909: 152
BERGROTH 1908: 178
BREDDIN 1905: 26
1905