Ischnopelta crassula 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 : 131-135

publication ID 10.11646/megataxa.6.2.3


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scientific name

Ischnopelta crassula Rosso & Campos

sp. nov.

Ischnopelta crassula Rosso & Campos , sp. n. ( Figs. 5P View FIGURE 5 , 22–23 View FIGURE 22 View FIGURE 23 )

Etymology. Epithet proposed by Dr. H. Ruckes as registered in the manuscripts found with the specimens used in the study.He considered that this species has thicker and more irregular punctures, from which the epithet is inferred. Latin crassus = thick + ula = diminutive.

Type locality. PARAGUAY, C entral, San Bernardino [-25.2667, -57.3167] GoogleMaps .

Holotype. Male. PARAGUAY, C entral, San Bernardino (2 km S. San Bernardino), 6.II.1968, L. & C. W. O’Brien. Deposited at the National Museum of Natural History ( USNM), Washington D.C., USA.

Paratypes. 7 males and 13 females. BRAZIL, Mato Grosso do Sul, Corumbá , 1 male and 1 female, 16.X.1956, C. R. Gonçalves, [-19.0167, -57.65], ( MNRJ, Coleção Campos Seabra ); GoogleMaps PARAGUAY, Concepcion, Vallemi , 1 male and 2 females, 4. II.1976, Delloach, [-22.1333, - 57.9667], ( USNM); Central , Asunción, 2 males and 3 females, B. Podtiaguin. [-25.2939, -57.6111], ( AMNH); San Bernardino , 2 females, 14. I.1939, Dernier Coll., [- 25.2667, -57.3167], ( MLPA); 1 male and 1 female, Fiebrig, [-25.2667, -57.3167], ( UFRG); San Bernadino ( Ypacaraí lake ), 1 female, 11.X.1968, L. & C. W. O’Brien, [-25.2667, -57.3167], ( J. E. Eger, Private Collection ); Areguá , 1 male and 1 female, 7. V.2006, C. Aguilar, [-25.3125, -57.3847], ( J. E. Eger, Private Collection ); Lambaré , 1 female, 9.X.1989, G. Arriagada , [-25.3125, -57.3847], ( J. E. Eger, Private Collection); ARGENTINA, Misiones , 1 male and 1 female, [-27.3671, -55.8961], ( MLPA) GoogleMaps .

Description. The overall somatic morphology is as described for I. scutellata , except for the following features.Head.Labruminsertedanteriortohalfthedistance between the anterior margin of the eyes and the apex of mandibular plates. Antennae dark yellowish, segment III brownish; antennal segment ratio: I>II<III<IV<V.

Thorax. Scutellum reaching the apical angles of urosternite VI. Hemelytra: conspicuous spot at apex of radial vein. Evaporatorium not reaching the lateral margin of mesopleura. Setae on posterodorsal margin of protibiae as long as the others.

Abdomen. Some specimens present extensive reddish blotches on the median region of urosternites.

Male. Apical margin of membrane of hemelytra convex. Median portion of posterior margin of urosternite VII subrectilinear; urosternite VII not reaching anteriorly the imaginary line connecting the spiracles of sternite V. Genitalia. Pygophore with dorsal and ventral rim concave ( Figs. 22C View FIGURE 22 , dr; 22D, vr). Posterolateral angles 1.8 times longer than the rest of the pygophore, perpendicular to the frontal plane and convergent from the base, dorsal margin folded to the interior of pygophore ( Fig. 22C–E View FIGURE 22 , pla). Setae short and sparse on posterior half of ventral and lateral surface of the pygophore, and on outer surface of posterolateral angles; setae long on ventral rim, and apex and ventral margin of posterolateral angles. Segment X longer than wide, surpassing the apex of parameres, but not reaching the apex of posterolateral angles; subrectangular, and strongly emarginated apically; lateral margins sclerotized and covered by long setae; midlongitudinal area membranous and with short and sparse setae ( Figs. 22C; 22L–M, X View FIGURE 22 ). Parameres claviform, perpendicular to the frontal plane; outer and inner surfaces sinuous, distal portion of inner surface slightly concave, with differentiated texture formed by transversal lines; acute and convergent apical process; ventral surface sinuous; dorsal surface narrow, distal half strongly convex distally; setae covering apical portions of ventral and outer surfaces, and posterior margin ( Fig. 22F–I View FIGURE 22 ). Cup-like sclerites visible externally and with rounded and subparallel apices ( Fig. 22D View FIGURE 22 , cls). Phallus: proximal half of vesica as wide as distal margin of phallotheca, dorsally flat and ventrally convex, gradually narrowing until curving ventrally; distal half sinuous and curved ventrally; secondary gonopore beveled ( Fig. 22J–K View FIGURE 22 ).

Female. Hemelytral membrane not reaching the posterior margin of mediotergite VIII, posterior margin convex; median portion of posterior margin of mediotergite VIII subrectilinear; median portion of posterior margin of urosternite VII concave; projections of urosternite VII ( Fig. 23C View FIGURE 23 , mpr) as described for I. scutellata . Genitalia. Valvifers VIII wider than long; posterior margin strongly sinuous, sutural margin slightly convex and oblique in relation to the median line, lateral portion sinuous, partially subparallel to the sutural rim; sutural margins subrectilinear and dorsally folded; surface dark yellowish with brown punctures; setae on sutural margins and on median half of posterior margin; longitudinal grooves narrow and shallow ( Figs. 5P View FIGURE 5 ; 23C View FIGURE 23 , vf8). Valvifers IX covered by valvifers VIII; lateral margin subrectilinear; setae on mid-basal portion of ventral surface ( Fig. 23D View FIGURE 23 , vf9). Laterotergites IX not reaching the posterior margin of mediotergite VIII; lateral margin convex; setae on median portion of lateral margin and mid-basal portion of ventral surface ( Fig. 23C–D View FIGURE 23 , la9). Thickening of vaginal intima subcircular, wider than long; proximal margin sinuous and wider than the distal one, distal margin weakly emarginated; median area with small membranous subtriangular cone, and sinuous longitudinal ventral crests ( Fig. 23D View FIGURE 23 , vi). Vesicular area: anterior portion to the collar with slight proximal widening ( Fig. 23D View FIGURE 23 , mdp), median duct posterior to the collar with proximal and distal widening ( Fig. 23D View FIGURE 23 , md), inner duct coiled in the proximal widening ( Fig.23D View FIGURE 23 , id).Distal ductus receptaculi 0.5 the length of the vesicular area posterior to the collar ( Fig. 23D View FIGURE 23 , drd, drp). Pars intermedialis broader distally ( Fig. 23D View FIGURE 23 , pi); annular crests perpendicular to the pars intermedialis, the proximal slightly smaller than the distal one ( Fig. 23D View FIGURE 23 , dac, pac). Capsula seminalis globose, with a long and sinuous laterobasal filiform projection directed to the pars intermedialis, and a minute lateral projection ( Fig. 23D View FIGURE 23 , cs, pr).

Measurements: Table 8.

Distribution. Brazil (Mato Grosso do Sul), Paraguay (Concepcion, Central, Itapuá), Argentina (Misiones) ( Fig. 7 View FIGURE 7 ).

Comments. See observations in I. alalonga sp.n..


University of Copenhagen


Department of Botany, Swedish Museum of Natural History


Nationaal Herbarium Nederland, Leiden University branch


Naturhistorisches Museum Wien


Smithsonian Institution, National Museum of Natural History


Departamento de Geologia, Universidad de Chile


Museu Nacional/Universidade Federal de Rio de Janeiro


Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet


American Museum of Natural History


&quot;Alexandru Ioan Cuza&quot; University


Instituto de Biologia


University of the Witwatersrand


Royal Botanic Garden Edinburgh


Royal British Columbia Museum - Herbarium


Conservatoire et Jardin botaniques de la Ville de Genève













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