Hypatropis sternalis (Stål, 1869)

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 : 18-20

Hypatropis sternalis (Stål, 1869)

Figs 21, 24 , 59 , 99–110 , 111

Melpia sternalis Stål, 1869 : 229; 1872: 31; Berg, 1879: 49; Lethierry & Severin, 1893: 146.

Hypatropis sternalis: Kirkaldy, 1909: 91 ; Pirán, 1996: 87; Barão et al. 2017: 110, fig. 3G; Coscarón, 2017: 227; Barão et al. 2020: figs 10, 69; Barros et al. 2020b: 18 S.

Type material examined: Holotype ♂, ARGENTINA, [Buenos Aires], La Plata, <Photo examined> ( NHRS).

Other material examined. BRAZIL, ♀, [Rio Grande do Sul], Pelotas , 20.X.1975, Glória, ( UFRG) <illustrated specimen >.

Diagnosis. Mandibular plates longer than clypeus ( Figs 99–101 ); mesial margins of mandibular plates contiguous in relation to clypeus, and apically convergent ( Fig. 101 ). Proportions of antennomeres: 1> 2 <3> 4 <5. Posterior margins of bucculae reaching base of head ( Fig. 102 ). Labium short, ending between pro- and mesocoxae ( Fig. 100 ). Proportions of labiomeres: 1 <2 ~ 3> 4. Each peritreme of ESES reaching about 1/3 of the distance to lateral margin of evaporatorium. Median furrow of the peritreme short, reaching less than half of peritreme. Evaporatorium of mesopleuron reaching more than half of the segment, and present in a diagonal from mesepimeron to mesepisternum. Gyrification of evaporatorium with low wrinkles. Metathoracic spiracle narrow ( Figs 21, 24 ). Hemelytra not surpassing the abdominal apex ( Fig. 99 ). Connexivum exposed, angles concolour to dorsal color. Spiracles elliptical, spiracle of abdominal sternite 2 not covered by metathorax. Mesial area adjacent to spiracles without callosity.

Measurements. See Table 1 .

Male genitalia. Posterolateral angles of pygophore rounded ( Figs 103–105 ). Genital cup occupying less than half of pygophore length. Extension of dorsal rim well-developed over segment X ( Fig. 103 ). Layers of ventral rim separated by a carina; area between layers depressed ( Fig. 104 ). Inferior layer of ventral rim with two processes. Segment X rectangular. Phallus ( Figs 106–108 ): Processus capitati shorter, reaching the middle phallotheca. Dorsal processes of phallotheca uniformly wide, shorter than posterodorsal projection.

Female genitalia. Valvifers 8 flat, posterior margins straight. Valvifers 9 flat, with anterior margins concave and posterior margins straight, sclerotized lateral arms not attaining anterior margins of laterotergites 9 ( Fig. 109 ). Proximal ductus receptaculi convoluted, extremely long, at least three times longer than vesicular area. Distal ductus receptaculi convoluted, extremely long, at least five times longer than vesicular area. Annular flanges convergent ( Fig. 110 ).

Distribution. Brazil (Santa Catarina, and Rio Grande do Sul); Argentina (Buenos Aires, and Entre Rios) ( Fig. 111 ).

Figures

FIGURE 111. Occurrence records of the species of Hypatropis.

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 55–59. Hypatropis Bergroth, 1891. Holotype, habitus dorsal. 55: H. australis; 56: H. inermis; 57: H. rolstoni; 58: H. similis; 59: H. sternalis. Scale bars = 1.0 mm.

FIGURES 99–110. Hypatropis sternalis (Stål, 1869). 99–100: Habitus dorsal and ventral. 101–102: Head, dorsal and lateral view; 103–105: Pygophore in dorsal, posterior and ventral view; 106–108: Phallus in dorsal, lateral, ventral and posterolateral view; 109: Genital plates in posteroventral view; 110: Female receptaculum seminis and aussenwand. Abbreviations: ddr, distal ductus receptaculi; pdr, proximal ductus receptaculi; va, vesicular area. Scale bars = 99–100: 1.0 mm; 101–102, 109–110: 0.5 mm; 103–105: 1.0 mm; 106–108: 0.25 mm.