Braunus machadoi Barão & Garbelotto, 2016

Barão, Kim Ribeiro, Garbelotto, Thereza De Almeida, Campos, Luiz Alexandre & Grazia, Jocelia, 2016, Unusual looking pentatomids: reassessing the taxonomy of Braunus Distant and Lojus McDonald (Hemiptera: Heteroptera: Pentatomidae), Zootaxa 4078 (1), pp. 168-186 : 174-175

Braunus machadoi Barão & Garbelotto sp. nov.

( Figures 4 , 36–43 , 78, 80 )

Material examined. Holotype ♂, PERU, Cuzco, Wayqecha Research Center , 2921 m, 13°10’21”S 71°34’53”W, 1.XII.2011, C. Weirauch leg., P11L32 sweep/beat ( AMNH) .

Diagnosis. Head light castaneous dorsally; outline of each mandibular plate black. Each anterior angle of pronotum with a stout, spine-like tubercle, barely surpassing lateral margin of each compound eye; each anterolateral margin with stout tubercles; each humeral angle bilobed apically, with two processes anteriorly and one process posteriorly; each posterolateral margin sinuated, with a median tubercle; posterior margin weakly concave ( Fig. 4 ). Apex of hemelytral radial vein calloused; corium reaching abdominal segment VII. Male genitalia: posterolateral angles of pygophore quadrate; inferior layer of ventral rim strongly emarginated, with bilobed projection medially; parameres rounded apically ( Figs 38–43 ).

Description. Body color mottled dark brown and yellowish, predominantly yellowish dorsally and dark brown ventrally; head yellowish, outline of each mandibular plate black dorsally; labial apex brown; anterior and posterior margins of each connexival segment black, yellow medially; legs yellowish with brown spots ( Figs 36–37 ). Mandibular plates longer than clypeus. Proportion of antennal segments: I=II<III=IV<V. Labial apex attaining posterior margin of metasternum. Spiny projection at each anterior angle of pronotum directed anterolaterad, barely exceeding lateral limit of each compound eye. Anterolateral margins of pronotum each bearing 2+2 well-produced, finger-like tubercles; each humeral angle bilobed apically, with two processes anteriorly and one process posteriorly; posterolateral margins sinuate, each with a median tubercle; pronotal disc calloused between cicatrices; cicatrices swollen ( Fig. 4 ). Scutellum reaching posterior margin of abdominal segment VI; lateral margins of scutellum each with shallow excavation; scutellum swollen longitudinally, medially; postfrenal lobe about 1/3 of length of frenal lobe. Corium longer than scutellum, reaching anterior margin of abdominal segment VII; hemelytral membrane surpassing apex of abdomen; veins coarse, reticulate. Hind wings reduced. Mesosternum with median carina slightly elevated. Metasternum with shallow median furrow.

Male genitalia. Dorsal rim concave with 1+1 flap-like projections laterally to segment X ( Figs 38–39 ; dr). Each posterolateral angle quadrate bearing tufts of setae ( Figs 38–39 ; pa). Inferior layer of ventral rim projected posteriorly, bilobed apically ( Figs 42–43 ; vr); superior layer of ventral rim depressed medially ( Figs 38–41 ; sl). Segment X rectangular ( Figs 38–41 ; X). Parameres F-shaped; paramere head blade-like, rounded apically; in lateral view, with a rounded, median process ( Fig. 41 ; par).

Measurements. Total length, 7.8; head length, 2.1; head width, 1.4; length of pronotum, 1.6; width of pronotum at base, 4.0; maximum width of pronotum at humeral angle, 5.2; length of scutellum, 2.7; width of scutellum, 2.7; width of abdomen across third segment, 5.1.

Etymology. machadoi , genitive singular; named after Angelo B. M. Machado on the occasion of his 80th birthday.

Distribution. Peru (Cuzco) ( Figs 78, 80 ).

Remarks. Female unknown.

Figures

FIGURES 1 – 11. Schematic drawings of pronotum of Braunus Distant, 1899 in dorsal view. 1 – 3. B. sciocorinus (Walker, 1867); 4. B. machadoi Barão & Garbelotto sp. nov.; 5. B. gibbus Garbelotto & Barão sp. nov.; 6. B. prionotus Barão & Garbelotto sp. nov.; 7. B. asperus (McDonald, 1982) comb. nov.; 8. B. ateuchus (Brailovski & Rolston, 1986) comb. nov.; 9. B. bordoni (Thomas, 1997) comb. nov.; 10. B. brettlizorum (Thomas, 1997) comb. nov.; 11. B. ocellatus (Thomas, 2001) comb. nov. Scale bars = 1 mm.

FIGURES 36 – 43. Braunus machadoi Barão & Garbelotto sp. nov. 36 – 37. habitus; 36. dorsal view; 37. ventral view; 38 – 43. pygophore; 38 – 39. dorsal view; 40 – 41. posterior view; 42 – 43. ventral view. Abbreviations: dr = dorsal rim; pa = posterolateral angle; par = paramere; sl = mid depression of superior layer of ventral rim; vr = ventral rim; X = abdominal segment X. Scale bars: 35 – 36 = 2 mm; 37 – 42 = 0.5 mm.

FIGURES 78 – 82. Distribution of species of Braunus Distant, 1899 and localities of some collection events. 78. map of localities; 79. a collection locality of B. sciocorinus (Walker, 1867) and B. ocellatus (Thomas, 2001) comb. nov. (ECUADOR, Napo, Yanayacu Biological Station; photo by D. Forero); 80. type locality of B. machadoi Barão & Garbelotto sp. nov. (PERU, Cuzco, Wayqecha Research Center; photo by C. Weirauch); 81 – 82. a collection locality of B. ocellatus (Thomas, 2001) comb. nov. (ECUADOR, Napo, 1.3 km SW of Baeza; photos by J. Skuhrovec).