Hypoxys triangularis (Dallas, 1851), 2020

Cunha, Eduardo Victor De Paiva & Fernandes, José Antônio Marin, 2022, New species of the Hypoxys triangularis group and the first contribution on the morphology of the internal genitalia of Hypoxys Amyot & Serville, 1843 (Hemiptera: Pentatomidae: Edessinae), Zootaxa 5168 (5), pp. 501-520 : 511-513

Hypoxys triangularis (Dallas, 1851)

( Fig. 9 , 19E–F, 22— Nunes et al. (2020); 6D, 7A, 8A, 9A, 12)

Edessa triangularis Dallas, 1851: 320 (original description).

Edessa triangularis Walker, 1868: 425 ; Stål, 1872: 60; Lethierry & Severin, 1893: 195 (catalog); Kirkaldy, 1909: 165 (catalog)

Edessa scabriventris Stål, 1859: 231 ; Stål, 1860: 28; Walker, 1868: 429; Stål, 1872: 56; Lethierry & Severin, 1893: 194 (catalog); Kirkaldy, 1909: 164 (catalog); Silva et al. 2018: 424 (checklist)

Edessa leprosula Breddin, 1904a: 144 ; Bergroth, 1908: 179; Kirkaldy, 1909: 159 (catalog)

Hypoxys triangularis (Dallas, 1851) Nunes et al. (2020) : 420 (diagnosis and distribution).

Diagnosis. See Nunes et al. (2020). Characteristic added here: Male genitalia. Dorsal surface with spot extending about ¼ of the length of the pygophore (9A— Nunes et al. (2020)). Inner wall with well-swollen area attached to dorsal rim ( Fig. 8A , black arrow). Phallus ( Fig. 7A ). Vesica tapering dorsally in lateral view. Phallotheca curved. Female genitalia. Pars intermedialis subcylindrical medially ( Fig. 6D ). Capsula seminalis with three thick projections: one projection half the length of the others, the other two projections with half of the length of pars intermedialis ( Fig. 6D ).

Distribution ( Fig. 12 ): FRENCH GUIANA; BRAZIL: Pernambuco, Bahia, Alagoas, Espírito Santo, Rio de Janeiro, Paraná, Santa Catarina, Rio Grande do Sul.

Comments. The H. triangularis can be separated from the other species of the H. triangularis group by posterior stripe of pronotum reddish brown and body ventrally with large number of small yellow calli.

Figures

FIGURE 6. Internal female genitalia: A—Hypoxys trabeculus (Breddin, 1907) (H. quadridens group); B—H. oxyacanthus (Breddin, 1904) (H. oxyacanthus group); C—H. aspilogaster Mendonça et al., 2021 (H. balteatus group); D—H. triangularis (H. triangularis group); E—H. subrastratus (H. triangularis group); F—H. myrtacivorus sp. n. (H. triangularis group). Acronyms: aac—anterior annular crest; ch—chitinellipsen; cs—capsula seminalis; de—ductus receptaculi; vf9—valvifers 9; la9—laterotergite 9; pac—posterior annular crest; pi—pars intermedialis; tvi—thickening of vaginal intima; x—abdominal segment X. Scale bars = 1mm.

FIGURE 7. Phallus A—H. triangularis; B—H. subrastratus; C—Hypoxys myrtacivorus sp. n. Acronyms: ph—phallotheca; vs—vesica. Scale bars = 1mm.

FIGURE 8. Male genital capsule in posterolateral view, swollen area on inner wall of the pygophore indicated by the arrow: A—Hypoxys triangularis; B—H. capito; C—H. subrastratus; D—H. myrtacivorus sp. n.; E—H. curvatus sp. n.; F—H. striatus sp. n. Scale bars = 1mm.

FIGURE 9. Female genital plates in oblique view, mediolateral crest swollen on valvifers VIII indicated by the arrow: A— Hypoxys triangularis; B—H. capito; C—H. subrastratus; D—H. myrtacivorus sp. n.; E—H. curvatus sp. n.; F—H. striatus sp. n. Scale bars = 1mm.

FIGURE 12. Distributional map of the species H. triangularis group.