Hypoxys curvatus, 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 : 509

Hypoxys curvatus sp. n.

(Figures: 4, 8E, 9E, 11A–B, 12)

Etymology. The specific epithet refers to the humeral angle curved backwards.

Holotype. BOLIVIA. Cercado: 1 ♂ Rio Cristal Mavu 50 mi NE Cochabamba, VIII– II.1944, L. Pena Collector ( USNM).

Paratypes (n=5). PERU. Loreto: 1 ♂ Iquitos, Amazon River , 4.II.1927, H. Bassler Coll. ( USNM) ; Huanuco Department : 1 ♂ Puente Cinchavito , 25 km S Tíngo Maria, 3400’, 11–17. IV .1987, J. E. Eger Coll. ( JEE) ; BOLIVIA. Santa Cruz: 1 ♀ Prov. Ichilo 3–5 km SSE of Buena Vista, ± 400m; 5–12.II.2000, 17°29’96”S 63°39’13”W, W. B. Warner ( JEE) ; BRAZIL. Acre: 1 ♂ Triunfo , X. 9.1977, D. Dominick Coll. ( INPA) .

Measurements. Total length 13.1–14.5; total width 6.9–7.9; head length 2.9–3.2; head width 2.9–3.2; interocular distance: 1.6–1.7; length of antennal articles I: 0.6–0,9; II: 0.9–1.0; III: 1.2–1.5; IV: 2.5–2.9; V: 2.8–3.0; pronotum length 2.5–3.0; pronotum width 9.2–10.1; scutellum length 6.0–6.7; scutellum width 4.5–5,3.

Diagnosis. Antennomeres with increasing lengths progressively (I<II<III<IV≤V). Anterolateral margin of pronotum unpunctured ( Fig. 11A ). Humeral angles posteriorly curved, longer than eyes width ( Fig. 11A ). Corium reddish brown ( Fig. 11A ). Metasternal process with arms of anterior bifurcation receiving 2/3 of third rostral segment ( Fig. 11B ). Pseudosutures of abdomen with adjacent dark green spot ( Fig. 11B ). Male genitalia. Dorsal surface with spot restricted to coarse area of the pygophore ( Fig. 4A ). Dorsal rim less excavated than other species ( Fig.4A ); lateral expansion slightly surpassing level of posterolateral angles ( Fig. 4C ). Superior process of the genital cup elliptic, long and narrow ( Fig. 4B ). Paramere head with distal margin strongly concave; anterior and posterior lobes subrectangular, apices rounded; anterior lobe large, reaching the superior process of the genital cup; posterior lobe short and laterally curved ( Fig. 4D ). Proctiger moderately excavated laterally, excavation covered by short sparse setae; posterior face triangular ( Fig. 4B ). Inner wall with slight swollen, narrow area contiguous to posterolateral angles ( Fig. 8E , black arrow). Ventral rim excavated, V-shaped; expansions little developed, rounded and curved dorsally ( Fig. 4C ). Female genitalia ( Fig. 4E ). Valvifers VIII distal and outer lateral margins almost straight and sloping; outer angle of the posterior margin forming a spine overlapping valvifers IX base ( Fig. 9E , red arrow); mediolateral crest swollen globose ( Fig. 9E , black arrow); mesial borders with deep U-shaped excavation. Valvulae IX exposed, with median keel, and somewhat sclerotized.

Distribution ( Fig. 12 ). PERU: Loreto, Huanuco Department; BOLIVIA: Cercado, Santa Cruz; Brazil: Acre.

Comments. The female genitalia of H. curvatus sp. n., H. myrtacivorus sp. n., H. ocanensis sp. n., and H. triangularis show the outer angle forming a spine, but in H. curvatus sp. n. and H. ocanensis sp. n. this spine is dislocated to the middle of the valvifers IX base (in H. myrtacivorus sp. n. ( Fig. 1E ) and H. triangularis the outer angle spine is lateral). Hypoxys curvatus sp. n. can be separated from H. ocanensis sp. n. by mesial borders of valvifers VIII deeply excavated and U-shaped (less excavated and V-shaped in H. ocanensis sp. n.). The spinose outer angle separates these four species from the others of H. triangularis group.

Figures

FIGURE 1. Hypoxys myrtacivorus sp. n. Male (pygophore): A—dorsal view, B —posterior view, C—ventral view, D— posterolateral view. Female: E—genital plates. Acronyms: Dr—dorsal rim; Pc—superior process of the genital cup; Pa— parameres; Proc—proctiger; Vr—ventral rim; Vf8—valvifers VIII; Vf9—valvifers IX; Lat 8—laterotergites VIII; Lat 9— laterotergites IX; Va9—valvulae IX; X—tenth segment. Scale bars = 1 mm.

FIGURE 4. Hypoxys curvatus 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 11. Dorsal and ventral view. A–B H. curvatus sp. n.; C–D Hypoxys ocanensis sp. n. Scale bars = 5mm.

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