Aridocoris Miranda, López & Schwertner gen. nov.

(Figs. 2–3)

Type Species. Aridocoris guidonae Miranda, López & Schwertner sp. nov., here designated.

Etymology. The generic name refers to the climate regime of the type-locality, which presents an extended dry period during the year. The name is composed of the prefix Arid -, from the Latin adjective aridus (arid, dry), and the ending - coris, from the Greek noun koris (bug); the gender is masculine.

Diagnosis. Aridocoris gen. nov. can be recognized by the following combination of characters: medium sized, body color above dark-brown with castaneous spots, bearing sparse, small, and thin setae along the whole body; clypeus clavate, forked and concave at apex; apices of mandibular plates acuminate and convergent, not contiguous with clypeus, curved downwards; posterior margin of bucculae lobate; presence of a pair of preocular spines; anterolateral margins of pronotum with up to six robust spines; humeral angles bifurcated; connexiva exposed.

Head (Figs. 2A–B, 3A). Subquadrate, wider than long; eyes dark brown, globose, subpedunculate; interommatidial sensillae present; spiny preocular projections (ps) present, smaller than half width of the eyes; ocelli closer to eyes than to each other; clypeus (cl) rounded, bifurcated and concave at the apex, slightly longer than the mandibular plates (mp); mandibular plates convergent, lateral margins sinuous and apex acuminated; apex of mandibular plates not contiguous with the clypeus, convergent and curved downwards. Antennal segments proportions IV> V> II> III> I, segment I not surpassing apex of mandibular plates; segments IV and V bicolor, apically dark brown and basally pale. Segment I of labium shorter than bucculae (buc), apex of labium surpassing metacoxae, reaching base of urosternite III; bucculae elevated, truncated anteriorly and rounded posteriorly, with an acute anterior projection.

Thorax. Pronotum trapezoidal, declivent anteriorly, with many deep punctures; anterolateral angles rounded; anterolateral margins toothed, with 5–6 acute spines; humeral angles distinctly forked with a converging apex; posterolateral margins of pronotum sub-rectilinear. Scutellum triangular, longer than wide, reaching connexival segment VI; scutellar fovea present, a small calli adjacent to each fovea. Peritreme spout and short, not reaching middle width of evaporatoria; evaporatoria subrectangular, reaching the posterior half of mesopleura and the lateral half of metapleura, elevated in relation to the rest of the metapleura. Mesosternum longitudinally carinate; metasternum slightly depressed.

Hemelytra. Coria castaneous to dark brown with sparse dark punctures. Lateral margins of coria convex, yellowish, with few dark punctures. Apex of radial vein smooth, without punctures. Membranes short, not reaching apex of abdomen; membrane veins parallel.

Legs. Light brown with dark brown punctures on the femora and tibiae. Femora unarmed; relative length of the femora: meta-> meso-> profemora. Tibiae dorsally sulcate and ventrally bearing stout setae. Tarsi 3-segmented, segments I and III subequal, II smaller.

Abdomen. Connexiva exposed,medially light brown,with anterior and posterior portions dark brown.Urosternites predominantly light brown, punctures sparser than on dorsum; spiracles black, darker than urosternites.

External female genitalia (Figs. 3C–D). Laterotergites VIII (lt8) rhomboid, acute at apex. Laterotergites IX (lt9) elongate and acute at the apex, surpassing mediotergites VIII but not reaching apex of laterotergites VIII.

Remarks. Here we tentatively classify Aridocoris in the Carpocorini tribe mainly by the absence of an abdominal spine and the spout-like peritreme, characteristics found in most of the New World genera included in the tribe (Rider et al. 2018). Both the serrated aspect of the anterolateral margin of pronotum and the hemelytra not surpassing the abdominal posterior limit in Aridocoris are shared with the Euschistus group (Barão et al. 2020). Aridocoris also shares some morphological aspects with Braunus Distant and Pentatomiana Grazia & Becker, such as the dorsal surface of the body strongly rugose, the head subquadrate and the eyes subpedunculate (Grazia & Barcellos 2004; Barão et al. 2016). However, any conclusions about the generic classification can only be taken after a robust phylogenetic analysis including all these genera.