Hypoxys nigroantennatus, Mendonca & Nunes & Fernandes, 2021

Mendonca, Maria Thayane S., Nunes, Benedito M. & Fernandes, Jose Antonio M., 2021, Description of fifteen new species of the Hypoxys balteatus species group (Hemiptera: Heteroptera: Pentatomidae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 61 (1), pp. 289-318 : 308

Hypoxys nigroantennatus sp. nov.

( Figs 4C–D , 16A–F , 21B )

Material examined. Hඈඅඈඍඒඉൾ:J, FRENCH GUIANA: Roura / i.1986 / G.Tavakilian ( MNHN).Pൺඋൺඍඒඉൾඌ: FRENCH GUIANA: ♀, 1984 / G. Tavakilian Rec. ( MNHN); ♀, 22.vii.1984 / G. Tavakilian Rec.( MNHN); ♀, 5 – 7.vi.2005 / J. E. Eger and M. T. Messenger col. // 04º32.214’ N 052º07.420’ W // ( JEE); ♀, 2.ii.1984 / G. Tavakilian Rec. ( UFRGS).

Diagnosis. Antennae black ( Figs 4C,D ). Antennomere II longer than III. Apex of mandibular plates with black stripe ( Figs 4C,D ). Pronotum with smoky stripe reaching posterior margin. Thoracic and abdominal pleurites and sternites with black spots ( Figs 16F , 4D ). Anterior excavation of metasternal process harboring fourth, third and part of second rostral segment ( Fig. 16F ). Male genitalia. Pygophore ( Figs 16A–D ). Posterolateral angles developed, straight, acuminate ( Fig. 16A ). Superior process of genital cup parallel to dorsal rim, elongated, almost reaching posterolateral angles, concave medially; inner (proximal) part truncate, ventral angle with large dentiform process; outer (distal) part tongue-like and enlarged ( Figs 16C,D ). Paramere with two lobes; anterior lobe square, large, and directed to base of proctiger; lateral lobe large and rounded ( Figs 16C,D ). Proctiger with posterior face triangular ( Figs 16C,D ). Ventral rim with expansions developed, distally acuminate, ventrolateral side with broad striated excavation, dorsal side with light brown spot; clearly surpassing level of posterolateral angles ( Figs 16B,C ). Female genitalia. Genital plates ( Fig. 16E ). Valvifers 8 posterior margin with posterolateral angles dentiform and posteriorly directed, inner angle not visible; imaginary line tangent to posterolateral angles not reaching distal margin of valvifers 9; excavation V-shaped. Valvulae 8 visible. Apices of laterotergites 8 clearly above level of apices of abdominal segment VII. Laterotergites 9 surpassing band connecting laterotergites 8; apices slightly below imaginary line tangent to apices of abdominal segment VII.

Measurements (n = 5; mm). Total length 18.4 – 19.6; head length 1.8 – 2.3; head width 3.8 – 4.3; pronotum width 10.2 – 11.8; abdomen width 8.7 – 9.8; length of antennomeres: I – 1.0 – 1.2; II – 2.0 – 2.3; III – 1.3 – 1.5; IV – 4.7 – 7.5; V: missing; scutellum length 7.6 – 8.7; scutellum width 5.8 – 7.0; pronotum length 3.4 – 4.1.

Differential diagnosis. Hypoxys nigroantennatus sp. nov. differs from the other species of the H. balteatus species group because the antennae and margin of the mandibular plates are black; valvifers 8 excavation is also unique in the group. Also see differential diagnosis of H. hyalinofasciatus sp. nov. for more details.

Etymology. Named for the black coloration of the antennae (Latin niger = black, antennatus = bearing antennae); adjective.

Distribution ( Fig. 21B ). French Guiana: Roura.

Remark. All setae from proctiger were removed when cleaning the pygophore.

Figures

Figs 4A–F. Dorsal and ventral surface.A–B – Hypoxys immaculatus sp. nov.; C–D – Hypoxys nigroantennatus sp. nov.; E–F – Hypoxys santarensis sp. nov. Scale bars = 5 mm.

Figs 16A–F. Hypoxys nigroantennatus sp. nov. A–D – pygophore in dorsal, ventral, posterior and posterolateral view, respectively; E – genital plates; F – metasternal process. Scale bars = 1 mm.

Figs 21A–B. Occurrence maps of the sixteen new species of the Hypoxys balteatus species group.