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) Author Cunha, Eduardo Victor De Paiva 0000-0002-2386-6734 Universidade Federal do Pará, Instituto de Ciências Biológicas, Av. Augusto Correa # 1, Belém, Pará, Brazil 66075 - 110. & eduardovdpc @ gmail. com; https: // orcid. org / 0000 - 0002 - 2386 - 6734 eduardovdpc@gmail.com Author Fernandes, José Antônio Marin 0000-0001-7450-5296 Universidade Federal do Pará, Instituto de Ciências Biológicas, Av. Augusto Correa # 1, Belém, Pará, Brazil 66075 - 110. & joseamf @ ufpa. br; https: // orcid. org / 0000 - 0001 - 7450 - 5296 joseamf@ufpa.br text Zootaxa 2022 2022-07-26 5168 5 501 520 journal article 107002 10.11646/zootaxa.5168.5.1 b0039631-f341-4018-b9b6-657063012307 1175-5326 6911501 121EA9DC-F17B-46FD-8987-F879BC6DAA99 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 ). 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. 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.