Stysiana acarinatis Grazia, Fernandes & Schwertner, 1999

Barros, Lurdiana D., Barão, Kim R. & Grazia, Jocelia, 2021, Taxonomic updates on the Mecocephala group (Hemiptera: Pentatomidae) Redescription of ‘ Hypatropis complex’, with a review of genitalic terminology and new records, Zootaxa 4981 (1), pp. 1-46 : 29

Stysiana acarinatis Grazia, Fernandes & Schwertner, 1999

Figs 4, 8, 12 , 23, 26 , 143 , 147–159 , 184

Stysiana acarinatis Grazia, Fernandes & Schwertner, 1999: 76–78 , figs 2, 5, 9, 13, 17, 21, 24, 27, 30, 34; Barão et al. 2017: 110; Coscarón, 2017: 232; Silva et al. 2018: 427 .

Type material examined. Holotype ♂, PARAGUAY, Asunción, [Asunción], 15.I.1983, E.G. Riley leg. ( USNM) <illustrated specimen >. Paratypes: PARAGUAY, 2♂ 1♀, Asunción, [Asunción], 15.I.1983, E.G. Riley leg. ( MLPA) ; ARGENTINA, ♀, Corrientes, I.1921, De Carlo leg. ( MLPA) ; ♀, Misiones , [Loreto], IX.1935, Berg leg. ( MLPA) ; ♂, ( UFRG) ; ♂, X.1935, no data. ( MLPA) .

Other material examined. BRAZIL, ♂, Paraná, Londrina , 31.XII.1997, Clarice leg. ( UFRG) <new record >; PARAGUAY, ♀, Asunción, [Asunción], 15.I.1983, E.G. Riley leg.

Diagnosis. Mesosternum slightly elevate ( Fig. 150 ). Median furrow of the peritreme short, reaching less than half of peritreme ( Figs 23, 26 ). Spiracles dark-brown.

Measurements. See Table 1 .

Male genitalia. Genital cup occupying more than half of pygophore length. Middle region of dorsal rim notched ( Figs 151–153 ). Phallus ( Figs 154–157 ): Dorsal connectives longer, surpassing the distal half of phallotheca. Dorsal processes of phallotheca wider basally. Conjunctiva with a pair of process, acute apically ( Fig. 157 ).

Female genitalia. Anterior margins of valvifers 9 straight. Posterior margins of laterotergites 8 straight ( Fig. 158 ). Proximal ductus receptaculi with greater diameter than the ductus inside vesicular area. Annular flanges convergent ( Fig. 159 ).

Distribution. Brazil (Paraná <new record>); Argentina (Corrientes, and Misiones); Paraguay (Asunción) ( Fig. 184 ).

Figures

FIGURE 184. Occurrence records of the species of Stysiana, Luridocimex and Pedinonotus.

FIGURES 1–12. Head and pronotum. 1–4: dorsal view; 5–8: detail of anterior angles of pronotum; 9–12: lateral view. 1, 5: Hypatropis inermis; 9: Hypatropis australis; 2, 6, 10: Amauromelpia ussu; 3, 7, 11: Luridocimex wygodzinskyi; 4, 8, 12: Stysiana acarinatis. Abbreviations: aap, anterior angle of pronotum. Scale bars = 0.5 mm.

FIGURES 21–26. SEM images of external scent efferent system of metasternal glands. 21–26: evaporatorium; 24–26: detail of evaporatorium. 21, 24: Hypatropis sternalis; 22, 25: Amauromelpia ussu; 23, 26: Stysiana acarinatis. Abbreviations: am, anterolateral margin; ev, evaporatorium; ms, mesopleuron; mt, metapleuron; o, ostiole; om, outer margin; per, peritreme; pod, periostiolar depression. Scale bars = 21–23: 500 μm; 24–26: 100 μm.

FIGURES 143–146. Stysiana Grazia, Fernandes & Schwertner, 1999. Holotype, habitus dorsal. 143: S. acarinatis; 144: S. meridionalis; 145: S. pardidens; 146: S. tropicalis. Scale bars = 1.0 mm.

FIGURES 147–159. Stysiana acarinatis Grazia, Fernandes & Schwertner, 1999. 147–148: Habitus dorsal and ventral. 149: Head in lateral view; 150: Pro- and mesosternum, white rectangle showing mesosternum not carinate; 151–153: Pygophore in dorsal, posterior and ventral view; 154–157: Phallus in dorsal, lateral, ventral and posterolateral view; 158: Genital plates in posteroventral view; 159: Female receptaculum seminis and aussenwand. Abbreviations: bc, bucculae; cs, capsula seminalis; pi, pars intermedialis; st, secondary thickenings of valvulae 9; va, vesicular area. Scale bars = 147–148, 151–153, 158–159: 1.0 mm; 149–150: 0.5 mm; 154–157: 0.25 mm. Ductus not preserved.