Ischnopelta ruckesi 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 : 172-175

publication ID

https://doi.org/ 10.11646/megataxa.6.2.3

publication LSID

lsid:zoobank.org:pub:0A8F7E38-8D11-44EE-8840-F8DE241306D0

DOI

https://doi.org/10.5281/zenodo.5753231

persistent identifier

https://treatment.plazi.org/id/03828787-2C71-FFD4-FF77-FB36FAEC065D

treatment provided by

Plazi

scientific name

Ischnopelta ruckesi Rosso & Campos
status

sp. n.

Ischnopelta ruckesi Rosso & Campos , sp. n. ( Figs. 5J View FIGURE 5 , 44–45 View FIGURE 44 View FIGURE 45 )

Etymology. The epithet is in honor of Dr. Herbert Ruckes, who worked at the American Museum of Natural History (AMNH) and started, without concluding, the revision of Ischnopelta . He suggested in his manuscript four epithets used here to name the new species.

Type Locality. BRAZIL, Minas Gerais, Carmo do Rio Claro [-20.9746, -46.1134] GoogleMaps .

Holotype. Male. BRAZIL, Minas Gerais, Carmo do Rio Claro, I.1958, Carvalho & Becker. Deposited at the Museu de Zoologia da Universidade de São Paulo ( MZSP), São Paulo (SP), Brazil.

Paratypes. 3 males and 7 females. BRAZIL, São Paulo, Batatais , 2females, XII.1943, [-20.8922, -47.5901], ( MCZN, Coleção Padre Pio ) GoogleMaps ; 1 male and 1 female, 3. I .1967, J . Moure, [-20.8922, -47.5901], ( DZUP); Minas Gerais, São Sebastião do Paraíso GoogleMaps , 1 male and 1 female, II .1945, Araújo, [-20.9165, -46.9861], ( MZSP) GoogleMaps ; 1 male, 23. II .1945, O . Monte, [-20.9165, -46.9861], ( MCNZ) GoogleMaps ; 1 female, 23. II .1945, O . Monte, [-20.9165, -46.9861], ( MZSP); Carmo do Rio Claro GoogleMaps , 1 female, I .1958, Carvalho & Becker, [-20.9746, -46.1134], ( MZSP); São Paulo, Iperó, George Oeterer GoogleMaps , 1 female, 15.XI.1961, Werner Col., [-23.4464, -47.5167], ( UFRG) GoogleMaps .

Description. The overall somatic morphology is as described for I. scutellata , except for the following features. Body densely punctured, brownish. 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 darker ventrally and with minute punctures on segments II and II; 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. Evaporatorium not reaching the lateral margin of mesopleura. Setae on posterodorsal margin of protibiae as long as the others.

Abdomen. 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 and strongly sclerotized ( Fig. 44C View FIGURE 44 , dr); ventral rim subrectilinear with wide and shallow median depression ( Fig. 44D View FIGURE 44 , 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. 44C–E View FIGURE 44 , pla). Setae short and sparse on posterior half of ventral and lateral surfaces of pygopbore, and on outer surface of posterolateral angles; setae long on ventral and apical margins of posterolateral angles and ventral rim, except on the median depression. Segment X as wide as long, not reaching the apex of posterolateral angles and parameres; rounded; apical margin flat and membranous, lateral margins convex, basal margin narrow and membranous; surface sclerotized and covered by setae, denser on basal half of lateral margins ( Figs. 44C–E, X; 44L–M View FIGURE 44 ). Parameres falciform, flat, as long as the posterolateral angles; subparallel to the frontal plane; outer margin sinuous; apical margin subrectilinear; inner margin sinuous, distal portion strongly excavated and with apical aculeiform process, convergent and ventrolaterally directed ( Fig. 44D, F and G View FIGURE 44 , amp); ventral surface with an oblique crest delimiting a small apical area ( Fig. 44D and G View FIGURE 44 , vcp), covered by setae ( Figs. 44D View FIGURE 44 , pa; 44F–I). Cup-like sclerites externally visible and with convergent apices ( Fig. 44D View FIGURE 44 , cls). Phallus: proximal 2/3 of vesica ventroposteriorly directed, base as wide as the apical margin of phalloteca, ventrally expanded and gradually narrowing; distal 1/3 sinuous, ventrally directed; secondary gonopore ventral and beveled ( Fig. 44J–K View FIGURE 44 ).

Female. Membrane of hemelytra 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 as described for I. scutellata (Fig. 745C, mpr). Genitalia. Valvifers VIII wider than long; posterior margin slightly sinuous and transversal to the median line, with small projection on the lateral angle; sutural margins subrectilinear and folded dorsally; surface dark yellowish with punctures and brown blotches, and narrow and shallow longitudinal grooves; setae on the distal portion of the sutural margins and inner portion of posterior margin Legend: tl, total length; mw, maximum width (at the sternite III level); hl, head length; cl, clypeus length; hw, head width; iod, interocellar distance; ied, interocular distance; pl, pronotum length; haw, pronotum width at the level of humeral angles; aaw, pronotum width at the level of anterolateral angles; sl, scutellum length; fll, frenal lobe length; pfl, post-frenal lobe length; bsw, basal scutellum width; fcw; scutellum width at the level of frenal constriction; I, II, III, IV and V, antennal and labium segments length.

( Figs. 5J View FIGURE 5 ; 45C View FIGURE 45 , vf8). Valvifers IX covered; lateral margin convex, setae on mid-basal portion of ventral surface ( Fig. 45D View FIGURE 45 , vf9). Laterotergites IX not reaching the posterior margin of mediotergite VIII; lateral margin subrectilinear; setae on mid-basal portion of lateral margin and ventral surface ( Fig. 45C–D View FIGURE 45 , la9). Thickening of vaginal intima sub hexagonal, slightly wider than long; distal margin sinuous and more sclerotized; mid-basal subquadrangular area membranous ( Fig. 45D View FIGURE 45 , vi). Vesicular area anterior to the collar 1/10 of the posterior portion; median duct anterior to the collar with slight proximal widening ( Fig. 45D View FIGURE 45 , mdp), median duct posterior to the collar with proximal and distal widening ( Fig. 45D View FIGURE 45 , md), inner duct not coiled ( Fig. 45D View FIGURE 45 , id). Distal ductus receptaculi of same caliber as the proximal ( Fig. 45D View FIGURE 45 , drd, drp). Pars wider distally ( Fig. 45D View FIGURE 45 , pi); proximal annular crest perpendicular to the pars intermedialis, twice the diameter of the distal crest, this directed to the pars intermedialis ( Fig. 45D View FIGURE 45 , dac, pac). Capsula seminalis globose and with a latero-basal filiform projection directed to the pars intermedialis ( Fig. 45D View FIGURE 45 , cs, pr).

Measurements: Table 20.

Distribution. Brazil (São Paulo, Minas Gerais) ( Fig. 8 View FIGURE 8 ).

Comments. See comments in I. coralinae sp. n.. Ischnopelta ruckesi sp. n. is the only species in the I. coralinae group whose distal portion of the outer margin of the parameres is subrectilinear ( Fig. 44F–G View FIGURE 44 , amp).

MZSP

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

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

I

&quot;Alexandru Ioan Cuza&quot; University

J

University of the Witwatersrand

DZUP

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

O

Botanical Museum - University of Oslo

MCNZ

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

UFRG

Instituto de Biologia

Kingdom

Metazoa

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Pentatomidae

Genus

Ischnopelta