Hypoxys striatus, Cunha & Fernandes, 2022

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 : 506

Hypoxys striatus sp. n.

(Figures: 2, 8F, 9F, 10C–D, 12)

Etymology. The specific epithet refers to the paramere posterior face striated.

Holotype. BRAZIL. Pará : 1 ♂ Óbidos, VIII.1978, A. C. Domingos Coll. ( MNRJ).

Paratypes (n=3). BRAZIL. Pará: 1 ♀ Óbidos , XII.1963, Dirings Coll. ( MZUSP) ; 1 ♀ e 1 ♂ Santarém, VI .1919, S. M. Klages Coll. ( CMNH) .

Measurements. Total length 14.3–14.8; total width 7.7–8.0; head length 1.4–1.5; head width 3.2–3,4; interocular distance: 1.6–1.8; length of antenomeres I: 0.9–1.0; II: 1.0–1.1; III: 1.5; IV: 3.1–3.2; V: 3.6; pronotum length 2.7– 3.0; pronotum width 8.9–9.2; scutellum length 6.5–6.7; scutellum width 5.0–5.3.

Diagnose. Antennomeres with increasing lengths progressively (I<II<III<IV<V). Anterolateral margin of pronotum not punctured ( Fig. 10C ). Corium reddish brown ( Fig. 10C ). Metasternal process with arms of anterior bifurcation receiving 2/3 of third rostral segment ( Fig. 10D ). Pseudosutures of abdomen with adjacent dark green spot ( Fig. 10D ). Male genitalia. Dorsal surface with spot restricted to coarse area of the pygophore ( Fig. 2A ). Dorsal rim sinuous ( Fig. 2A ); lateral expansions slightly globose and almost level with posterolateral angles ( Fig. 2C ). Superior process of the genital cup subtriangular, small and swollen ( Fig. 2B ). Paramere with head slightly concave; anterior and posterior lobe subtriangular; anterior lobe large with external face striated and reaching superior process of the genital cup; posterior lobe smaller than the anterior lobe and laterally directed ( Fig. 2D ). Proctiger shallowly excavated laterally, excavation covered by long and dense setae; posterior face elliptical ( Fig. 2B ). Inner wall with small swollen area contiguous to posterolateral angles ( Fig. 8F , black arrow). Ventral rim in widely opened V-shaped with expansions hardly visible ( Fig. 2C ). Female genitalia ( Fig. 2E ). Valvifers VIII with distal margin slightly arched; outer and inner angles of the posterior margin rounded; mediolateral crest slightly swollen ( Fig. 9F , black arrow); mesial borders with excavation narrow, deep and U-shaped. Valvulae IX clearly exposed.

Distribution ( Fig. 12 ). BRAZIL: Pará.

Comments. The superior process of the genital cup of H. triangularis and H. striatus sp. n. are the smallest processes in the group, but in H. triangularis it is rounded and concave and in H. striatus sp. n. it is subtriangular and swollen. This species is the only one with expansions of the ventral rim hardly visible. The mesial borders of the valvifers VIII of H. curvatus sp. n., H. capito and H. subrastratus have the excavation forming a “U”. However, H. striatus sp. n. can be separated from the other two species by the more deeply excavated mesial borders.

Figures

FIGURE 2. Hypoxys striatus sp. n. Male (pygophore):A—dorsal view, B —posterior view, C—ventral view, D—posterolateral view. Female: E—genital plates. Scale bars = 1 mm.

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 10. Dorsal and ventral view. A–B Hypoxys myrtacivorus sp. n.; C–D H. striatus sp. n.; E–F H. saltensis sp. n. Scale bars = 5mm.

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