Lineostethus graziae Hildebrand & Becker, 1982

Garbelotto, Thereza de Almeida, Kochenborger, Ana Paula Leite & Campos, Luiz Alexandre, 2018, Revision of Lineostethus (Heteroptera: Pentatomidae: Discocephalini), Zoologia (e 21232) 35, pp. 1-24 : 12-14

Lineostethus graziae Hildebrand & Becker, 1982

Figs 4, 37–44, 78

Lineostethus graziae Hildebrand & Becker, 1982: 775–778 .

Diagnosis. The males of L. graziae differ from other species by the subtriangular foliaceous expansions of the dorsal rim, the subquadrangular cutting of the dorsal rim, the acute posterolateral angles ( Fig. 37: fdr, dr, pa), the projections of the superior layer of ventral rim rounded at apex ( Fig. 39: psl), and the ductus seminis distalis enlarged at apex ( Fig. 42: ds). Subtriangular foliaceous expansions of the dorsal rim are also seen in L. sinuosus sp. nov., but the cutting of the dorsal rim, the posterolateral angles, and the projections of the ventral rim are different, as well as the phallus ( Figs 37–39, 42, 45–47, 50: fdr, dr, pa). The females are distinguished by the subquadrangular gonocoxites VIII, the posterior margin of gonocoxites IX slightly concave ( Fig. 43: gcVIII, gcIX), the enlarged distal portion of the ductus receptaculi, and the median constriction in the capsula seminalis ( Fig. 44: ddr, cs). In the original description of L. graziae, Hildebrand and Becker (1982) described the connexival margins with large black strips, made of two lines of black punctures.However, the two specimens we found have thin strips, made of one line of black punctures.

Redescription. Antennal segments I–IV with longitudinal brown lines. Anterolateral margins of pronotum and proximal portion of lateral margin of corium without punctures. Unpunctured area laterad to the apex of radial vein of coria smaller than the width of one eye. Hemelytral membrane surpassing the apex do abdomen, with 7 veins. Anterior and posterior margins of connexival segments with one or two lines of black punctures ( Fig. 4). Ventrally, punctures sparse and concentrated laterally or gradually dispersed toward the midline. Femora with sparse brown circular spots on distal half.

Male genitalia. Foliaceous expansions of dorsal rim subtriangular; apex of expansions not surpassing the posterior limit of ventral rim; posterolateral angles visible dorsally ( Fig. 37: fdr, pa). Basal impression of the foliaceous expansions sinuous, cutting of dorsal rim subquadrangular, housing the apex of parameres ( Fig. 37: bi, dr, par). Posterolateral angles with subtriangular apex ( Figs 37–38: pa). Margin of the superior layer of ventral rim slightly concave, median excavation U-shaped ( Fig. 38: vr). Margin of the inferior layer of ventral rim with one arc of short bristles ( Fig. 38–39: b). Projections of the superior layer of ventral rim forming an acute angle with the posterolateral angles; projections with base and median portion enlarged and tapering to apex, covered by setae; apex rounded ( Fig. 39: psl, pa). Parameres tangent to segment X, reaching the foliaceous expansions of dorsal rim; head lozenge ( Figs 39–41: par, X; dr, fdr). Ventral surface of phallotheca concave ( Fig. 44: ph, ap). Vesica with rounded apex, apical margin rounded and placed along ductus seminis distalis almost to its apex ( Fig. 42: v, av, ds). Distal portion of ductus seminis distalis subequal to vesica in length, enlarged at apex ( Fig. 42: ds).

Female genitalia. Posterior margin of urosternite VII concave ( Fig. 43: VII). Gonocoxites VIII subquadrangular; apex slightly divergent; posterior margin convex ( Fig. 43: gcVIII). Posterior margin of laterotergites VIII convex; limit between laterotergites VIII and tergite VIII visible ( Fig. 43: la8). Posterior margin of gonocoxites IX convex ( Fig. 43: gcIX). Laterotergites IX digitiform, mesial margins divergent ( Fig. 43: la9). Posterior margin of segment X subrectilinear ( Fig. 43: X). Thickening of gonapophyses IX sinuous, not surpassing the lateral margin of the thickening of vaginal intima ( Fig.44: gpIX, tgIX). Thickening of vaginal intima subtriangular, flat ( Fig. 44: vi). Distal ductus recepitaculi sclerotized and enlarged; annular crests perpendicular to pars intermedialis; middle third of pars intermedialis less sclerotized ( Fig. 44: ddr, pi, cs). Capsula seminalis subequal to pars intermedialis in length, bearing median constriction ( Fig. 44: cs).

Measurements. Male (n = 1): head length, 1.60; width, 3.20; length of antennal segments: I, 0.44; II–V, missing; length of labial segments: I, 0.72; II, 1.56; III, 0.68; IV, 0.46; pronotum length, 1.72; width, 4.26; scutellum length, 3.56; width, 2.79; total length, 7.10; abdominal width, 4.50.

Female (n = 1): head length, 1.70; width, 3.40; length of antennal segments: I, 0.42; II, 0.78; III, 0.80; IV, 0.88; V, 0.98; length of labial segments: I, 0.78; II, 1.40; III, 0.70; IV, 0.58; pronotum length, 1.96; width, 3.56; scutellum length, 3.88; width, 3.80; total length, 8.70; abdominal width, 4.98.

Material examined. Holotype (female): MEXICO, Oaxaca: Totolapan (19 mi NW), 28-VII-1963, Collr: W. A. Foster leg. – California Academy of Sciences Type No. 15923 ( CAS) . Paratypes: MEXICO, Morelos: Cuernavaca (10mi E), 1 female, 31-VII-1963, W. A. Foster leg., CIS ( EMEC – photographs examined) ; Oaxaca: Totolapan (19 mi NW), 2 males and 1 female, 28-VII-1963, W. A. Foster leg., CIS ( EMEC – photographs examined) . Other specimens: GUATEMALA, Sacatepequez: Capetillo (5000 ft), 1 male, 21-VIII-1947, F.Johnson Donor, Cols. C. & P.Vaurie leg. ( AMNH) ; Antigua (1500-1600 mi), 1 female, June 1981, N.L.H. Krauss leg. ( AMNH) .

Distribution ( Fig. 78). Mexico: Morelos, Puebla, Oaxaca ( Hildebrand and Becker 1982). Guatemala: Sacatepequez (new record).

Remarks. Hildebrand and Becker (1982) indicated the Essig Museum of Entomology in the University of California Berkeley (EMEC) as deposit collection for the female holotype of L. graziae , but it is in the California Academy of Sciences under the type number 15923 and was examined by T.A.G.