Hypoxys oxyacanthus Nunes & Campos & Mendonca & Cunha & Fernandes 2020

Group H. oxyacanthus

(Figs. 12–16 A–E; 19 K–L, 20 A–H; 23)

Diagnosis. Pronotum and scutellum with brown punctures of the same size, uniformly distributed, and never on dark spots (Figs. 19K, 20A, C, E, G). Spots on pronotum usually restricted to narrow, short, transverse spots close to each humeral angle, these spots can become incomplete stripes, or complete smoky brown stripes in H. oxyacanthus (Fig. 19K), or complete solid black stripes in H. infulatus (Fig. 20C). Connexivum without large black spots that extend ventrally as in H. quadriden s group (Fig. 18A); usually green with yellow median spot; green part can turn brown or yellow in specimens not well preserved. Body lighter ventrally than dorsally, transversally striped in green and yellow, sometimes green stripes turn light brown (maybe a preservation problem) (Fig. 20B,D,F). Metasternal process with anterior arms more tumid than in H. quadriden s group species. Pygophore with superior process of genital cup subtriangular, deeply excavated black, close to proctiger, and a little further from dorsal rim than in H. quadriden s group. Margin of diaphragm, at base of proctiger, with row of setae. Paramere with head pyramidal; shaft with carina on inner side that splits distally in an arch uniting anterior and posterior apex (Fig. 12B); anterior lobe somewhat elongated and rounded; posterior lobe laterally directed. Ventral rim central excavation shallowly excavated; expansions surpassing level of posterolateral angles in ventral view (Figs. 12–16C). Females with genital plates very similar and are hard to separate, except H. infulatus (Fig. 14D). Gonocoxites 8 typically with posterior margin straight or slightly sinuous and slanting; and sutural border divergent on distal half; inner angle rounded and overlapping base of gonocoxites 9.

Head. Mandibular plates with apex concolorous; lateral margin without spot. Antennae yellow to brown with setae more densely distributed on antennomeres IV and V; second antennomere longer than third (Figs. 19K, 20A,C,E,G).

Thorax. Apex of humeral angle with margin black and slightly curved posteriorly (Fig. 20C). Cicatrices with concolorous punctures delimiting anterior sulci. Scutellum with apex not punctured. Black spot of costal margin reaching approximately 1/4 of corial margin. Propleura with a green stripe on anterolateral margin; punctures concolorous or brown. Evaporatorium rugulose, concolorous to whitish (Fig. 20B). Metasternal process (Fig. 19F) with anterior bifurcation receiving fourth and half of the third rostral segment.

Abdomen. Connexivum with punctures concentrated in two excavated areas separated by median yellow callous (Fig. 20A, C, E, G). One trichobothrium positioned in line with spiracles and the other located laterad of this line.

The group H. oxyacanthus is composed of Hypoxys oxyacanthus, H. brachyacanthus, H. infulatus, H. leptacanthus, H. tragelaphus, and a few new species.