Ischnopelta impunctata Rosso & Campos

Rosso, Pedro & Campos, Luiz Alexandre, 2021, Revision of Ischnopelta Stål, 1868 with the description of twenty new species (Hemiptera: Pentatomidae: Discocephalinae), Megataxa 6 (2), pp. 96-184 : 145-148

publication ID 10.11646/megataxa.6.2.3


persistent identifier

treatment provided by


scientific name

Ischnopelta impunctata Rosso & Campos

sp. nov.

Ischnopelta impunctata Rosso & Campos , sp. n. ( Figs. 5F View FIGURE 5 , 29–30 View FIGURE29 View FIGURE 30 )

Etymology. The epithet refers to the absence of punctures in large areas of the median region of the abdomen. Latin: im- = not, without + punctum = small point, punctures.

Type Locality. BRAZIL, Piauí, Piripiri [-4.0989, - 41.0981] GoogleMaps .

Holotype. Male. BRAZIL, Piauí, Piripiri (Parque Nacional Sete Cidades), 31.I.2007, I.S. Carvalho. Deposited at the collection of Universidade Federal of Pará ( UFPA), Belém (PA), Brazil.

Paratypes. 9 males and 9 females. BRAZIL, Maranhão, SãoLuiz , 1female, 13. III .1984,A.BrisolaCol., [-2.5325. -44.2963], (UNIFESP); 1 female, 22. V .1984, A. Brisola Col., [-2.5325. -44.2963], (UNIFESP); 1 male and 2 females, 08.VII.1987, A. Brisola Col., [-2.5325. - 44.2963], (UNIFESP); Piauí, Piripiri ( Parque Nacional Sete Cidades ) , 1 male, 12.XII.2006, I.S. Carvalho, [- 4.1256, -41.7093], ( UFPA) GoogleMaps ; 5 males and 2 females, 31.I.2007, I.S. Carvalho, [-4.0989, -41.0981], ( UFPA) GoogleMaps ; 1 female, 23. VI .2007, I.S. Carvalho, [-4.0989, -41.0981], ( UFPA); Maranhão, Mirador (Parque Estadual Mirador, Posto Avançado do Mel ) GoogleMaps , 1 female, 18–25. III .2012, F. Limeira de Oliveira & D. W. A. Marques, [-6.730556, -44.983056], ( CZMA / UEMA); Paraíba, Juazeirinho GoogleMaps , 1 male and 1 female, 26. VI .1956, A. G. A. Silva, [- 6.730556, -44.983056], ( MCNZ, Coleção Campos Seabra); Piauí, Uruçuí ( Estrada Estadual de Uruçuí ) GoogleMaps , 1 male, 2–26. V .1984, R . Gonçalves, [-7.2316, -44.5564], ( DZUP) GoogleMaps .

Description. The overall somatic morphology is as described for I. scutellata , except for the following features. Head. Labrum inserted anteriorly to half the distance between the anterior margin of the eyes and the apex of mandibular plates. Antennae dark yellowish, slightly brown ventrally; segments ratio: I=II<III<IV<V.

Thorax. Hemelytra: corium as long as scutellum, conspicuous spot at apex of the radial vein. Pro-, meso-and metapleura dark yellowish, densely punctured on the laterals. Setae on posterodorsal margin of protibiae as long as the others.

Abdomen. Urosternites with the anterior lateral blotch slightly longer than the posterior one, both wide; median region of urosternites weakly punctured.

Male. Apical margin of membrane of hemelytra subrectilinear. Median portion of posterior margin of urosterniteVII concave; urosternite VII not reaching anteriorly the imaginary line connecting the spiracles of urosterniteV. Genitalia.Pygophorewithdorsalrimconcave ( Fig. 29C View FIGURE29 , dr), ventral rim subrectilinear with a slight median depression extending to the ventral surface of the pygophore ( Fig. 29C View FIGURE29 , vr). Posterolateral angles 1.6 times longer than the rest of the pygophore, base perpendicular and apex oblique to the frontal plane, convergent from the base ( Fig. 29C–E View FIGURE29 , pla). Setae short and sparse on posterior half of ventral and lateral surfaces of the genital capsule and on the outer surface of the posterolateral angles; setae long on ventral rim and on ventral and apical margins of posterolateral angles. Segment X slightly longer than wide, oval, reaching the apex of posterolateral angles and surpassing the apex of parameres; proximal portion and apical margin membranous; lateral margins strongly convex; surface sclerotized and covered with setae, with 1 + 1 lateroproximal tufts ( Figs. 29C and E, X; 29L–M View FIGURE29 ). Parameres falciform, flat, shorter than the posterolateral angles, subparallel to the frontal plane; basal portion of outer margin convex, apical portion strongly convex; inner margin sinuous, distal portion strongly excavated and with an apical aculeiform process, convergent and ventrolaterally directed; apical margin convex; ventral surface with an oblique crest ( Fig. 47B and E View FIGURE 47 , vcp); setae covering the crest and the posterior region ( Figs. 29D View FIGURE29 , pa; 29F–I). Cup-like sclerites externally visible and with convergent apices ( Fig. 29D View FIGURE29 , cls). Phallus: proximal 2/3 of vesica directed ventroposteriorly, base as wide as apical margin of the phallotheca and gradually narrowing, with a ventral subtriangular expansion; distal portion directed ventrally; secondary gonopore ventral and beveled ( Fig. 29J–K View FIGURE29 ).

Female. Membrane of hemelytra surpassing the posterior margin of mediotergite VIII, posterior margin convex; posterior margin of mediotergite VIII and of urosternite VII, and projections of urosternite VII laminate as described for I. scutellata ( Fig. 30C View FIGURE 30 , mpr). Genitalia. Valvifers VIII wider than long; posterior margin slightly sinuous, weakly folded dorsally, with small projection on the lateral angle; sutural margins subrectilinear and folded dorsally; surface dark yellowish, with punctures and brown blotches; setae on distal portion of sutural margins and on median half of posterior margin; longitudinal grooves narrow and shallow on basal portion ( Figs. 5F View FIGURE 5 ; 30C View FIGURE 30 , vf8). Apices of valvifers IX externally visible; lateral margin convex; setae on mid-basal portion of ventral surface ( Fig. 30C–D View FIGURE 30 , vf9). Laterotergites IX not reaching the posterior margin of mediotergite VIII; lateral margin convex; setae on mid-basal portion of lateral margin and ventral surface ( Fig. 30C–D View FIGURE 30 , la9). Thickening of vaginal intima hexagonal, slightly wider than long; distal portion more sclerotized; mid-basal subquadrangular area membranous ( Fig. 30D View FIGURE 30 , vi). Vesicular area anterior to the collar 1/10 of the posterior portion; median duct with slight proximal widening both anterior and posterior to the collar ( Fig. 30D View FIGURE 30 , md, mdp); inner duct not coiled ( Fig. 30D View FIGURE 30 , id). Distal ductus receptaculi of same caliber as the proximal one ( Fig. 30D View FIGURE 30 , drd, drp). Pars intermedialis uniformelly wide ( Fig. 30D View FIGURE 30 , pi); proximal annular crest perpendicular to the pars intermedialis, the distal one directed to the pars intermedialis and twice the diameter of the proximal crest ( Fig. 30D View FIGURE 30 , dac, pac). Capsula seminalis globose and with a laterobasal projection filiform directed to the pars intermedialis ( Fig. 30D View FIGURE 30 , cs, pr).

Measurements: Table 12.

Distribution. Brazil (Maranhão, Piauí, Ceará, Paraíba) ( Fig 7 View FIGURE 7 ).

Comments. Among the species grouped with I. coralinae sp. n. (see comments for the latter), Ischnopelta impunctata sp. n. is the only one having wide blotches on the laterals of the urosternites, and armed urosternite VII ( Figs. 29B View FIGURE29 , dt; 30B). In relation to the females of the group, I. impunctata sp. n. differs by the membrane of hemelytra surpassing the posterior margin of mediotergite VIII, and the median abdominal region weakly punctured ( Fig. 30A– B View FIGURE 30 ). Among males, I. impunctata sp. n. and I. parvula sp. n. are the only species with subrectilinear margin of the hemelytral membrane ( Figs. 29A–B View FIGURE29 ; 39A–B View FIGURE 39 ).




Royal British Columbia Museum - Herbarium


Mykotektet, National Veterinary Institute


Porto Alegre, Museu de Ciencias Naturais da Fundacao Zoo-Botanica do Rio Grande do Sul


Departamento de Geologia, Universidad de Chile


Universidade Federal do Parana, Colecao de Entomologia Pe. Jesus Santiago Moure













GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF