Hypoxys myrtacivorus, 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 : 504-506

Hypoxys myrtacivorus sp. n.

(Figures: 1, 6F, 7C, 8D, 9D, 10A–B, 12)

Etymology. The specific epithet refers to the feeding plants of this species (family Myrtaceae ).

Holotype. PERU. Loreto: 1 ♂ Iquitos, 14.V.1992, G. Couturier Col./ Host Plant Myrciaria dubia (Myrtaceae) / Isla Mayuy INIAA/IVITA MNHN(EH) 25126 ( MNHN).

Paratypes (n=23). No data, 1 ♀ 3093, 72304 ( MZUSP); PERU. Loreto: 2 ♂ and 3 ♀ Carretera Iquitos–Nauta, Estacion El Dorado INIAA Unamurú, IX–2006, J. Vasquez B., sobre Myrciaria dubia (Myrtaceae) “camu camu” MNHN ( EH) 25130-25134 ( MNHN); same data 1 ♂ and 1 ♀ ( UFPA); 1 ♂ Cocha Supay, Jenaro Herrero, 26.X.1988, 4° 55’S 73° 40’W, G. Couturier & H. Inga col., Plante–hote: Myrciaria dubia MNHN ( EH) 25127 ( MNHN); 1 ♂ Iquitos, 27. V.1991, G. Couturier Col., Host Plant Eugenia malaccensis L. ( Myrtaceae ) MNHN ( EH) 25128 ( MNHN); BRAZIL. Pará: 1 ♂ and 1 ♀ Tucuruí, Rio Tocantins, Acamp. Bagagem, 03.VII.1984, coleta Noturna ( MPEG); 1 ♂ Belém, Bairro Umarizal, XI. 2014 ( UFPA); 1 ♀ Belém, ICB— UFPA Campus Guamá, 17.XI.2021, E. V. P. Cunha col., sobre Eugenia uniflora L., Obs.: indivíduo se alimentando no ramo ( UFPA); 1 ♀ Belém, UFPA —Campus Guamá, 09.XII.2016, E. V. P. Cunha col.; Host Plant Eugenia malaccensis L. ( Myrtaceae ) ( UFPA); 1 ♀ Santarém, E. le Moult. ( RMNH); Amazonas: 1 ♂ Igarapé Tacana, Solimões, II.1962, Cândido & Dyrce ( MNRJ); 1 ♀ Benjamin Constant, Rio Javari, II.1942, Pko. ( MNRJ); Rondônia: 2 ♀ 62 km Ariquemes, nr Fazenda Rancho Grande, 8– 20.XI.1994, J. E. Eger & L. B. & C. W. O’Brien ( JEE); SURINAME. Sipaliwini: 1 ♀ Kayser Gebergte, Exped. H. A. Beatty, 25.XI–14.XII.1960, Sergiman Moentari leg. ( FMNH); GUIANA. Georgetown: 1 ♀ Belair, Y. VII.1931, R. T. Potts ( USNM); VENEZUELA. Monagas: 1 ♀ Josepín, 50m, 27.IX.1955, F. Fernandez y C. J. Rosales ( MBUC); COLOMBIA. Meta: 1 ♀ Peralonso, Caño Pachiaquiari, 4.IX.1965, J. A. Ramos Collector ( USNM).

Measurements. Total length 11.1–15.9; total width 6.2–8.5; head length 1.9–2.3; head width 2.9–3.4; interocular distance: 1.5–1.8; length of antennomeres I: 0.7–1.0; II: 0.9–1.5; III: 1.3–1.6; IV: 2,5–3,1; V: 2.5–3.4; pronotum length 2.4–3.8; pronotum width 7.7–9.3; scutellum length 5.9–7.8; scutellum width 4.4–5.4.

Diagnosis. Antennomeres with increasing lengths progressively (I<II<III<IV<V). Anterolateral margin of pronotum unpunctured ( Fig. 10A ). Metasternal process with arms of anterior bifurcation robust and receiving all third rostral segment ( Fig. 10B ). Pseudosutures of abdomen with adjacent dark green spot ( Fig. 10B ). Trichobothria with yellow base ( Fig. 10B ). Male genitalia. Dorsal surface with dark spot occupying 1/3 of the length of the pygophore ( Fig. 1A ). Superior process of the genital cup long and narrow ( Fig. 1B ). Paramere with dorsal margin strongly concave; anterior lobe large, subrectangular, reaching dorsal rim; posterior lobe short, rectangular laterally directed ( Figs. 1B, 1D ). Proctiger strongly excavated laterally, excavation and posterior face covered by long and sparse setae; dorsal face tapering posteriorly; posterior face triangular, small, below the level of dorsal face and ventrally bent, lateral areas slightly swollen ( Fig. 1D , 8D ). Inner wall swollen area globose and close to posterolateral angles ( Fig. 8D , black arrow). Ventral rim strongly excavated; bottom of median excavation convex ( Fig. 1C ). Phallus ( Fig. 7C ). Vesica (vs) half-moon-shaped in lateral view. Phallotheca (ph) slightly curved. Female genitalia ( Figs. 1E ). Valvifers VIII with rounded excavation; booth distal angles dentiform ( Fig. 9 , red arrow); inner angles reaching valvifers IX; mediolateral crest swollen along outer lateral margin ( Fig. 9D , black arrow); mesial borders contiguous forming a spiniform projection ( Fig. 9D ). Valvulae IX (Va9) exposed and sclerotized. Pars intermedialis (pi) spherical medially ( Fig. 6F ). Capsula seminalis with three thick projections almost as long as capsula seminalis ( Fig. 6F ).

Comments. This species was collected only on Myrtaceae plants, E. malaccensis (red jambo), E. uniflora (brazilian-cherry) and M. dubia (camu-camu). This species was observed feeding on branches from E. uniflora L., but in M. dubia it was observed feeding on fruits. Hypoxys myrtacivorus sp. n. was considered pest of camu-camu, M. dubia , in Peru, causing a transparent spot with a central red dot ( Panduro et al. 2001). Hypoxys myrtacivorus sp. n. had nymphal stages and biological aspects described by Iannacone et al. (2007), identified as Edessa aff. aulacosterna Stål, 1872 , but author mentioned that the species probably was new to science. Nevertheless, H. myrtacivorus sp. n. differs from Edessa aulacosterna by several aspects, but two are very conspicuous: humeral angles acute and slightly developed with apex brown to black (not developed, rounded and concolorous in E. aulacosterna ); anterior arms of metasternal process swollen and tapering anteriorly (laterally compressed in E. aulacosterna ). The shape of the paramere of this species resembles H. curvatus sp. n., but differ because the apex of the posterior lobe is acuminate in H. myrtacivorus sp. n. (in H. curvatus sp. n. the apices of the anterior and posterior lobes are rounded).

Distribution ( Fig. 12 ). PERU: Loreto; BRAZIL: Pará, Amazonas, Rondônia; SURINAME: Sipaliwini; GUIANA: Georgetown; VENEZUELA: Monagas; COLOMBIA: Meta.

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 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 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.