Prolatucoris, Barros & Brugnera & Barão & Grazia, 2020

Barros, Lurdiana Dayse de, Brugnera, Ricardo, Barão, Kim Ribeiro & Grazia, Jocelia, 2020, The genus Parahypatropis Grazia & amp; Fernandes, with description of two new species and description of a new similar monotypic genus (Hemiptera: Pentatomidae), Journal of Natural History (J. Nat. Hist.) 54 (15 - 16), pp. 1045-1071 : 1062-1064

Prolatucoris gen. nov. Barros, Brugnera and Grazia

( Figures 9 (a ‒ c), 10(a ‒ f), 11(a ‒ c), 12(e ‒ h), 18)

Type species. Prolatucoris mandibulatus sp. nov., here designated.

Diagnosis. Body elongated and flat dorsally. Anteocular process developed. Mandibular plates longer than clypeus. Labium short, not reaching mesocoxae. Hemelytral membrane not reaching apex of abdominal segment VII.

Description. Body elongated ( Figure 13 (a ‒ b)). Head. Wider than long, rounded apically ( Figure 13 (a)). Mandibular plates longer than clypeus, obtuse apically; lateral margins of mandibular plates sinuous and elevated, in relation to mesial margin. Clypeus obtuse apically, lower than mandibular plates in lateral view;clypeal suture beginning before an imaginary line crossing anterior margin of eyes.Anteocular process present.Antenniferous tubercles visible in dorsal view, with an obtuse process laterally. Antennomere I not reaching apex of head; antennomere II smaller than I, visible; antennomere III cylindrical, convex dorsally; antennomere IV conical, slightly flattened dorsally. Bucculae tapering towards base of head, not reaching its base. Labium short, not reaching mesocoxae. Labial segments entirely cylindrical; first labial segment between bucculae. Thorax. Pronotum trapezoidal ( Figure 13 (a)). Anterolateral margins of pronotum explanate, punctuated, slightly reflected and serrated. Posterior margin of pronotum slightly convex.Scutellum longer than wide ( Figure 13 (a)). Basal angles of scutellum foveate, foveae smaller than diameter of eyes. Wings. Hemelytral corium longer than scutellum, not surpassing apex of abdominal segment V. Apex of radial vein punctuated, with inconspicuous callosity. Membranal veins linear ( Figure 13 (a)). Mesosternal carina slightly elevated, smooth. Metasternal furrow shallow. Legs. Legs not concolorous to pleurites and sternites,with dark spots. Distance between the procoxae and mesocoxae twice the distance between mesocoxae and metacoxae. Length of femora and tibiae subequal. Femora unarmed. Tarsi 3-segmented. External scent efferent system: ostiole elliptical, opening lateroposteriorly. Periostiolar depression present. Peritreme bean-shaped. Median furrow of peritreme long,occupying more than half of peritreme.Evaporatorium punctuated,occupying more than half of meso and metapleuron. Metathoracic spiracle wide. Anterolateral margin of evaporatorium rounded. Extension of evaporatorium on mesopleuron surpassing anterior limit of mesocoxal suture, and reaching anterior and posterior lateral angles and the outer margin of metapleuron. Abdomen. Connexivum exposed, punctuated; posterolateral angles protruding from sternite edge ( Figure 13 (a)). Surface of abdominal sternites not grooved medially, sternites with an imaginary line tangential to the spiracles separating the trichobothria, one internal and another external to the line. Male genitalia. Genital cup broad, open dorsally. Ventral rim forming two layers, the inferior and superior layers of ventral rim, not separated by a carina; area between layers depressed. Superior layer of ventral rim projected towards genital cup, developed laterally to segment X, not covering parameres. Segment X carinated, with processes. Parameres reduced ( Figure 14 (a ‒ b)). Female genitalia. Gonocoxites VIII flat. Mesial margins of gonocoxites VIII juxtaposed. Gonapophyses VIII not visible. Laterotergites VIII lacking spiracles. Laterotergites IX surpassing tergite VIII ( Figure 16 (a ‒ b)).

Etymology. prolatus, from Latin: referring to the elongated spherical body along its main axis; oblong + coris: meaning true bug; gender is masculine.

Distribution. Rio Grande do Sul, Brazil.

Comments. Prolatucoris shares characters with the Mecocephala group, mainly antennomere II smaller than antennomere I, ventral rim of pygophore composed of two layers, reduced parameres, phallotheca with one pair of processes and three pairs of projections, ductus seminis distalis long, mesial margins of gonocoxites VIII juxtaposed; and, shared exclusively with Parahypatopis, the arcuate posterior portion of thickening of vaginal intima with equal length related to round anterior portion.

It resembles Parahypatropis , Hypatropis and Pedinonotus in the elongated body and dorsal facies. With Hypatropis and Pedinonotus , it shares the mandibular plates longer than clypeus; with Parahypatropis and Pedinonotus , it shares the reduced parameres, which are absent in Hypatropis . The configuration of the male genitalia is very similar to that of Parahypatropis , sharing the genital cup open dorsally, and the female genitalia are similar to those of Pedinonotus . However, Prolatucoris can be distinguished from the other genera by its short labium, not reaching the mesocoxae.