Brachystethus vexillum Breddin, 1903

Barcellos, Aline & Grazia, Jocélia, 2003, Revision Of Brachystethus (Heteroptera, Pentatomidae, Edessinae), Iheringia, Sér. Zool. 93 (4), pp. 413-446: 431-432

publication ID

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

DOI

http://doi.org/10.5281/zenodo.3719837

persistent identifier

http://treatment.plazi.org/id/217887A7-991F-8022-4BF8-5C0BFE906036

treatment provided by

Tatiana

scientific name

Brachystethus vexillum Breddin, 1903
status

 

Brachystethus vexillum Breddin, 1903  

( Figs. 9 View Figs , 19, 29 View Figs , 39 View Figs , 49 View Figs , 60 View Figs , 69 View Figs )

Brachystethus vexillum BREDDIN, 1903:371   ; BERGROTH, 1908:178; KIRKALDY, 1909: 152; PIRÁN, 1955:337.

Daimonocoris bolivianus KORMILEV, 1951:38   ; PIRÁN, 1955:337 (syn.).

Type material of B. vexillum   . Holotype, examined, labeled: a) Bolivia; b) Brachystethus vexillum Bredd   ; c) coll. Breddin; d) Holotypus; e) Dtsch. Entomol. Institut Berlin; f) HT vexillum   ( DEIC).   Typelocality: Bolivia.

Description. Dorsal surface black, with yellowish stripes on corium ( fig. 9 View Figs ). Head black, with well-marked wrinkles. Punctures moderately distributed, restrict to base of jugae and tylus. Antennae black; fourth antennal segment cylindrical. First antennal segment about 3/4 longer than second, third slightly longer than second, fourth almost twice longer than third and about 3/4 the length of fifth, the longest. Pronotum black, with fine punctures regularly distributed and coarse punctures sparse behind cicatrices. Before cicatrices, medium-sized punctures densely distributed. Anterolateral angles yellowish at apex. Scutellum black, with coarse punctures sparse, more frequent beside lateral margins of basal half. Corium black, without callus, with two yellow stripes: one on clavus, adjacent to claval suture and another occupying 2/3 ectad to radial vein, becoming broader apically toward clavus. Legsdark reddish-castaneous to black. Ventral surface of thorax dark reddish-castaneous to black; medium-sized punctures, concolor. Ostiolar rugae short, reaching 1/3 of distance between inner margin of ostiolum and lateral margin of metapleura. Metasternal carina with conspicuous transversal sulcus; in profile, little elevatedanteriorly. Connexivum black, inner superior angle of each segment orange, segments finely punctured. In some specimens, the orange area extends along inner lateral margin of seventhsegment. Venter red, with black spots on lateral thirds, as follows: one near lateral margin of each segment, becoming broader posterad, other small, around spiracles. On sternites III to VI, also present, entad to others, a larger spot, sub-elliptical, close to spiracle. Coarse punctures more concentrated on lateral thirds, over these spots. Spiracles black.

Male genitalia. Pygophore globose, apex and base equally wide. Lobes of dorsal rim conspicuous, strongly projected posterad, rounded at apex. Genital cup processes littlevisible dorsally ( figs. 19, 29). Parameres withacute apex, anteriorly directed ( fig. 49). Ventralrimopenly V-like ( fig. 39).

Measurements (n=3). Headlength 1.73 (1.68-1.76) ± 0.05, width 2.56 (2.52-2,60) ± 0.04; interoculardistance 1.49 (1.44-1.52) ± 0.05; anteocularlength 0.64; lengthof antennal segments: I - 0.85 (0.80-0.88) ± 0.05; II - 1.17 (1.12-1.20) ± 0.05; III - 1.44 (1.28-1.52) ± 0.14; IV - 2.59 (2.48-2.72) ± 0.12; V - 3.68; pronotallength 3.70 (3.59-3.84) ± 0.13, width 8.63 (8.52-8.85) ± 0.19; scutellarlength 5.87 (5.85-5.93) ± 0.05, width 5.29 (5.18-5.43) ± 0.13; coriumlength 8.24 (8.02-8.52) ± 0.26; abdominalwidth 10.08 (9.69-10.35) ± 0.35; total length 13.64 (13.03-14.28) ± 0.63.

Female genitalia. Sutural borders of gonocoxites 8 parallel, except on apical fifth. Posterior borders convex on outer half and sub-retilineous on inner half (fig. 60). Gonocoxites 9 almost three times wider across apex of arms than longmedially; anterior border openly U-like, moderately excavate at middle. Length of arms of gonocoxites 9 equal to 1/6 of plate width. Thickening of vaginal intima digitiform, elongated. Ductus receptaculi thin, one and a half longer before than after vesicular area. Capsula seminalis digitiform. Annular crests sub-parallel, turned toward vesicular area ( fig. 69).

Measurements (n=9). Headlength 1.93 (1.80-2.08) ± 0.08, width 2.77 (2.72-2.84) ± 0.05; interoculardistance 1.60 (1.48-1.68) ± 0.06; anteocularlength 0.69 (0.64-0.72) ± 0.04; lengthof antennalsegments: I - 0.91 (0.84-0.96) ± 0.04; II - 1.24 (0.96-1.36) ± 0.13; III - 1.56 (1.36-1.88) ± 0.16; IV - 2.75 (2.60-2.96) ± 0.13; V - 3.58 (3.44-3.68) ± 0.09; pronotallength 4.12 (3.84-4.34) ± 0.15, width 9.65 (9.27-10.02) ± 0.25; scutellarlength 6.74 (6.51-7.01) ± 0.17, width 5.97 (5.68-6.43) ± 0.21; coriumlength 9.32 (8.93-9.85) ± 0.27; abdominalwidth 11.44 (11.19-11.52) ± 0.13; totallength 15.56 (14.95-16.70) ± 0.56.

Material examined. PERU, Cuzco: Machu Picchu ,, 28.XI.1982, E.R. Ross col., California Academy of Sciences ( DARC)   ; (over ruins, 2600-2800m), 2, 4, 1.VII.1964, B. Malkin ( MZSP)   ;, 7.V.1965 (arbusto) ( MZSP)   ;, 1942, Weyrauch ( USNM)   ; Prov. Paucartambo, Pillahuata (2800m)   ,, 2, 19.XII.1952, F. Woytkowski ( USNM)   ; Marcapata ,, “Coll. I.R.Sc. N.B.” ( DARC)   . BOLIVIA, Yungas de Palmar (2000m),, R. Zischka ( USNM)   ; Cochabamba: Chapare prov., Alto Palmar (110m), 2, 2, XI.1961 ( DARC)   .

Distribution. Peru (Cuzco), Bolivia (Cochabamba).

Comments. Bra chystethus vexillum is closely related to B. tricolor   . The dorsal color pattern, with yellow stripes, and the globose pygophore distinguish this species from B. tricolor   .

DEIC

Germany, Muencheberg, Deutsches Entomologisches Institut im ZALF

DARC

DARC

MZSP

Brazil, Sao Paulo, Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

USNM

USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Pentatomidae

Genus

Brachystethus

Loc

Brachystethus vexillum Breddin, 1903

Barcellos, Aline & Grazia, Jocélia 2003
2003
Loc

Daimonocoris bolivianus KORMILEV, 1951:38

PIRÁN 1955: 337
KORMILEV 1951: 38
1951
Loc

Brachystethus vexillum BREDDIN, 1903:371

PIRÁN 1955: 337
KIRKALDY, G. W. 1909: 152
BERGROTH 1908: 178
BREDDIN 1903: 371
1903