Ischnopelta pellucidula 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 : 167-172

publication ID 10.11646/megataxa.6.2.3


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Ischnopelta pellucidula Rosso & Campos

sp. nov.

Ischnopelta pellucidula Rosso & Campos , sp. n. ( Figs. 3 View FIGURE 3 , 5K View FIGURE 5 , 41–43 View FIGURE 41 View FIGURE 42 View FIGURE 43 )

Etymology. Epithet proposed by Dr. H. Ruckes as registered in the manuscripts found with the specimens used in the study. He considered this species to have a semi-translucent aspect, from which the epithet is inferred. Latin: pellucidus = transparent + ula = diminutive.

Type Locality. BRAZIL, Roraima, Normandia [3.76952, -59.67135] GoogleMaps .

Holotype. Male. BRAZIL, Roraima, Normandia (Rio Ireng/Maú), 16.VIII.1911. Deposited at Museu Paraense Emilio Goeldi ( MPEG), Belém ( PA), Brazil .

Paratypes. 10 males and 13 females. VENEZUELA, Bolívar, Ciudad Bolívar (35 km SWP for Ruta 2), 1 female, 13.VII–2.VIII.1987, S. & J . Peck, [8.122222, - 63.549722], ( AMNH); San Francisco , 8 males and 7 females, 22–26.X.1966, J. & B GoogleMaps . Bechyné & E . Osuna, [7.0667, -63.6], ( MIZA); Chirima , 1 female, 12.X.1966, J. & B . Bechyné & E . Osuna , [5.05, -60.95], ( MIZA) ; BRAZIL, Roraima, Normandia (Rio Ireng / Maú ), 2 males and 4 females, 16.VIII.1911, [3.76952, -59.67135], ( UFRG) GoogleMaps .

Description. The overall somatic morphology is as described for I. scutellata , except for the following features. Two color morphs: the specimens from Roraima, Brazil, have low-contrasting punctures giving to the cuticle a light brown appearance ( Figs. 41A–B View FIGURE 41 and 42A–B View FIGURE 42 ); the specimens from Bolívar, Venezuela, high-contrasting, dark punctures giving to the cuticle a dark brown appearance ( Figs. 41C–D View FIGURE 41 and 42C–D View FIGURE 42 ). Head. Labrum inserted anteriorly to half the distance between the anterior margin of the eyes and apex of mandibular plates. Antennae: segments I to III dark yellowish, segments IV to V brown; segments ratio: I≥II<III<IV<V.

Thorax. Hemelytra: corium as long as scutellum; spot at apex of the radial vein absent. Pro-, meso- and metasternum dark yellowish and densely punctured. Evaporatorium not reaching the lateral margin of mesopleura. Setae on posterodorsal margin of protibiae as long as the others.

Abdomen. Dark spots at the lateral of urosternites narrow, subequal; urosternite VII unarmed.

Male. Apical margin of membrane of hemelytra convex; median portion of posterior margin of urosternite VII concave; urosternite VII not reaching anteriorly the imaginary line connecting the spiracles of urosternite V. Genitalia. Pygophore with dorsal rim concave ( Fig. 43A View FIGURE 43 , dr) and ventral rim shallowly concave ( Fig. 43B View FIGURE 43 , vr). Posterolateral angles 1.4 times longer than the rest of the pygophore, base perpendicular and apex oblique to the frontal plane, convergent from the base ( Fig. 43 View FIGURE 43 A−C, pla). Setae short on posterior half of ventral and lateral surfaces of pygophore and on outer surface of posterolateral angles; setae long on ventral rim, except on median excavation. Segment X as wide as long, not reaching the apex of the posterolateral angles; rounded, narrower at the base; basal and apical margins and midbasal region membranous; dorsal surface covered by setae ( Figs. 43A–C, X; 43J–K View FIGURE 43 ). Parameres falciform, flat, shorter than posterolateral angles, subparallel to the frontal plane; outer margin sinuous, distal portion strongly convex; inner margin sinuous, distal portion strongly excavated and with an aculeiform apical process, convergent and ventrolaterally directed; apical margin convex; ventral surface with sinuous longitudinal crest ( Fig. 43B and E View FIGURE 43 , vcp), setae covering the region posterior to the crest ( Figs. 43B View FIGURE 43 , pa; 43D−G). Cup-like sclerites externally visible, apices convergent ( Fig. 43B View FIGURE 43 , cls). Phallus: proximal portion of vesica convex ventrally; distal portion bent ventrally; secondary gonopore ventral and beveled ( Fig. 43 View FIGURE 43 H−I).

Female. Membrane of hemelytra not reaching the posterior margin of mediotergite VIII, posterior margin convex; median portion of posterior margin of mediotergite VIII and of urosternite VII subrectilinear, and projections urosternite VII laminate as described for I. scutellata ( Fig. 43L–M View FIGURE 43 , mpr). Genitalia. Valvifers VIII wider than long, posterior margin subrectilinear and slightly oblique to the median line; sutural margins subrectilinear and folded dorsally; setae on the distal half of sutural margins and on median half of posterior margin ( Figs. 5K View FIGURE 5 , 43L–M View FIGURE 43 , vf8). Valvifers IX almost completely covered by valvifers VIII; lateral margin convex, setae sparse on mid-basal portion of ventral surface. Laterotergites IX reaching the posterior margin of mediotergite VIII; lateral margin convex; setae on mid-basal portion of lateral and ventral surfaces ( Fig. 43L–N View FIGURE 43 , la9). Thickening of vaginal intima sub-hexagonal, wider than long; distal margin more sclerotized and slightly concave; median area subrectangular, membranous ( Fig. 43N View FIGURE 43 , vi). Vesicular area anterior to the collar 1/10 of the posterior portion; median duct with proximal widening both anterior and posterior to the collar ( Fig. 43N View FIGURE 43 , md, mdp); inner duct distended not coiled ( Fig. 43N View FIGURE 43 , id). Distal ductus receptaculi of same caliber as the proximal ( Fig. 43N View FIGURE 43 , drd, drp). Pars intermedialis cylindrical ( Fig. 43N View FIGURE 43 , pi); proximal annular crest directed to the ductus receptaculi, and about half the diameter of the distal crest, the latter perpendicular to the pars intermedialis ( Fig. 43N View FIGURE 43 , dac, pac). Capsula seminalis globose with two lateral filiform projections directed to the pars intermedialis, one twice longer than the other ( Fig. 43N View FIGURE 43 , cs, pr).

Measurements: Table 19.

Distribution. Venezuela (Bolívar), Brazil (Roraima) ( Fig. 8 View FIGURE 8 ).

Comments. See comments in I. coralinae sp. n.. Ischnopelta pellucidula sp. n. differs by the longitudinal crest on the ventral surface of parameres ( Fig. 43E View FIGURE 43 , vcp), that is oblique or transversal in the other species of the I. coralinae sp. n. group ( Figs. 18G View FIGURE 18 , vcp; 24G, vcp; 29G, vcp; 31G, vcp; 39D, vcp; 44G, vcp).


Museu Paraense Emilio Goeldi


Universidade Federal do Oeste do Pará


Department of Botany, Swedish Museum of Natural History


University of the Witwatersrand


American Museum of Natural History


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


Royal Botanic Garden Edinburgh


Museo del Instituto de Zoologia Agricola Francisco Fernandez Yepez


Instituto de Biologia













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