Lineostethus auritus Garbelotto & Kochenborger, 2018

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 : 21

Lineostethus auritus Garbelotto & Kochenborger , sp. nov.

http://zoobank.org/ 2715A9D8-BB2E-4DA3-81DE-1988FAB542C9

Figs 8, 70–78

Diagnosis. Males of L. auritus sp. nov. are distinguished by the long and narrow foliaceous expansions of dorsal rim truncate at apex, leaving the posterolateral angles of pygophore visible dorsally. The females have broad gonocoxites VIII with the posterior margin uniformly convex; the shape of the thickening of the gonapophyses IX and of the thickening of vaginal intima are also diagnostic.

Description. Antennae usually brown, with lateral lines ivory, sometimes antennae variegated. Anterolateral margins of pronotum and proximal portion of lateral margin of corium punctured. Anterior margin of scutellum with two to four brown spots, and at least one ivory spot medially; post-frenal lobe sometimes with lateral brown maculae. Connexival segments with lines of black punctures on anterior and posterior margin of each segment. Unpunctured area laterad to the apex of radial vein of coria at least equivalent to half of eye width. Hemelytral membrane slightly surpassing the apex of abdomen, with 9 veins. Ventrally, punctures concentrated on lateral margins of abdomen. Femora with sparse brown circular spots on distal half.

Male genitalia. Foliaceous expansions of dorsal rim subrectangular, elongated, longer than wide; lateral margins of expansions slightly concave; apex truncate, slightly wider than the median width, surpassing the posterior limit of ventral rim by half of the expansion length; not hiding the posterolateral angles ( Fig. 70: fdr, pa). Basal impression of the foliaceous expansions sinuous, cutting of dorsal rim subrectangular ( Fig. 70: bi, dr). Posterolateral angles acute, ventrally covered by setae ( Figs 70–71: pa). Margin of the superior layer of ventral rim open V-shaped, median excavation drop-shaped ( Fig. 71: vr). Margin of the inferior layer of ventral rim with two lines of short bristles: one posterior, subrectilinear and not associated with punctures; and another anterior, concave and associated with punctures ( Figs 71–72: b). Segment X with dorsal setae on apex ( Fig. 70: X). Projections of the superior layer of ventral rim forming a right angle with the posterolateral angles, covered by setae; dorsal and ventral margins subrectilinear, apex spatulate ( Fig. 72: psl, pa). Parameres parallel to segment X, surpassing the foliaceous expansions of dorsal rim; head subtriangular ( Figs 72–74: par, X, fdr). Ventral surface of phallotheca concave ( Fig. 75: ph, ap). Vesica apex rounded; apical margin convex, extending to mid of ductus seminis distalis ( Fig. 75: v, av, ds). Distal portion of ductus seminis distalis subequal to vesica in length ( Fig. 75: ds).

Female genitalia. Posterior margin of urosternite VII uniformly concave ( Fig. 76: VII). Gonocoxites VIII subquadrangular, broad; posterior margin uniformly convex ( Fig. 76: gcVIII). Posterior margin of laterotergites VIII subrectilinear; limit between laterotergites VII and tergite VIII indistinguishable ( Fig. 76: la8). Gonocoxites IX small, posterior margin subrectilinear ( Fig. 76: gcIX). Laterotergites IX digitiform, tumescent and rounded at apex ( Fig. 76: la9). Posterior margin of segment X concave ( Fig. 76: X). Thickening of gonapophyses IX subcilindrical slightly expanded on base, surpassing the lateral margin of the thickening of vaginal intima ( Fig. 77: gpIX, tgIX). Thickening of vaginal intima subtriangular ( Fig. 77: vi). Distal portion of ductus receptaculi apically enlarged and more sclerotized ( Fig. 77: ddr); anterior and posterior annular crests perpendicular to pars intermedialis; pars intermedialis membranous at apex, subequal to capsula seminalis ( Fig. 77: pi, cs). Capsula seminalis shallowly constricted near base ( Fig. 77: cs).

Measurements. Male (n = 2): head length, 1.78 ± 0.25 (1.60–1.96); width, 3.13 ± 0.21 (2.98–3.28); length of antennal segments: I, 0.46 ± 0.06 (0.42–0.50); II, 0.74; III, 0.52; IV, 0.78; V, 1.00; length of labial segments: I, 0.71 ± 0.10 (0.64–0.78); II, 1.50 ± 0.14 (1.40–1.60); III, 0.70 ± 0.03 (0.68–0.72); IV, 0.49 ± 0.07 (0.44–0.54); pronotum length, 1.8 ± 0.20 (1.66–1.94); width, 4.11 ± 0.43 (3.80–4.41); scutellum length, 3.38 ± 0.31 (3.16–3.60); width, 2.71 ± 0.29 (2.50–2.91); total length, 7.72 ± 1.68 (6.53–8.90); abdominal width, 4.53 ± 0.53 (4.15–4.90).

Female (n = 2): head length, 1.95 ± 0.04 (1.92–1.98); width, 3.49 ± 0.07 (3.44–3.54); length of antennal segments: I, 0.67 ± 0.18 (0.54–0.8); II, 0.89 ± 0.16 (0.78–1.00); III, 0.53 ± 0.04 (0.50–0.56); IV, 1.05 ± 0.04 (1.02–1.08); V, 1.25 ± 0.07 (1.20–1.30); length of labial segments: I, 0.74 ± 0.08 (0.68–0.80); II, 1.62 ± 0.03 (1.60–1.64); III, 0.77 ± 0.10 (0.70–0.84); IV, 0.54 ± 0.04 (0.51–0.56); pronotum length, 2.03 ± 0.07 (1.98–2.08); width, 4.78 ± 0.11 (4.70–4.85); scutellum length, 3.88 ± 0.11 (3.08–3.95); width, 2.92 ± 0.09 (2.85–2.98); total length, 9.40; abdominal width, 5.36.

Type material. Holotype (male): MEXICO, Oaxaca: (9 mi N Oaxaca), 31-V-1983, C.W. & L.O’Brien & Marshall leg. (deposited in: AMNH) . Paratypes: MEXICO, Oaxaca: (5mi S Candelaria Loxicha ), 1 male, 18-19-VII-1974, Clar Marray Ashe & Shaffner leg. ( DARC); (9mi N Oaxaca), 2 females, 31-V-1983, C.W. & L.O’Brien & Marshall leg. (1 female AMNH; 1 female DARC) .

Distribution ( Fig. 78). Mexico: Oaxaca.

Etymology. The epithet refers to the shape of the foliaceous expansions of dorsal rim of pygophore; Latin adjective, auritus (-a, -um) = eared.