Braunus prionotus 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 : 177-178

Braunus prionotus Barão & Garbelotto sp. nov.

( Figures 48–53 )

Material examined. Holotype ♀, COLOMBIA, VII.1974, Steinheil leg. ( MNHN) .

Diagnosis. Lateral margins of mandibular plates denticulate ( Fig. 48, 50 ). Anterior angle of pronotum with an obtuse process; anterolateral margins with two small tubercles; humeral angles directed anteriad, each with multiple tubercles ( Fig. 6 , 48 ). Apex of hemelytral radial vein calloused; corium reaching abdominal segment VI. Apex of scutellum reflexed laterally. Female genitalia: gonocoxites 8 wider than long; posterior margin of each gonocoxite 8 concave; posterior margin of each laterotergite 8 obtuse; posterior margin of gonocoxites 9 concave ( Figs 52–53 ).

Description. Body color dark brown ( Figs 48–49 ). Mandibular plates longer than clypeus; lateral margins denticulate ( Fig. 48 ). Proportion of antennal segments: I<II=IV<III (antennal segment V missing). Labial apex attaining abdominal sternite IV ( Fig. 49 ). Processes at anterior angles of pronotum each directed laterally, obtuse apically, not reaching posterior margins of compound eyes. Anterolateral margins of pronotum each bearing 2+2 little-produced, finger-like tubercles; humeral angles projected anteriad, each with multiple processes; each posterolateral margin sinuate; pronotal disc calloused between cicatrices ( Fig. 6 ). Scutellum reaching posterior margin of abdominal segment VI; scutellum swollen longitudinally, medially; postfrenal lobe about 1/2 of length of frenal lobe; apex of scutellum reflexed laterally. Hemelytral corium reaching abdominal segment VI; radial vein calloused apically; membrane reduced, not surpassing abdominal segment VI, veins absent. Hind wings reduced.

Female genitalia. Gonocoxites 8 wider than long; each sutural margin parallel and juxtaposed at 1/3 basal portion, widely separated and concave on the remaining 2/3; posterior margins concave ( Figs 52–53 ; gc8). Gonapophyses 8 visible, subtriangular, with median carina ( Figs 52–53 ; g8). Laterotergites 8 triangular, longer than wide, each posterior margin obtuse, surpassing tergite 8 ( Figs 52–53 ; la8). Gonocoxites 9 trapezoidal, posterior margin convex ( Figs 52–53 ; gc9). Laterotergites 9 finger-like, each strongly depressed basally; apices rounded, each barely surpassing posterior margin of tergite 8 ( Figs 52–53 ; la9). Segment X subrectangular ( Figs 52–53 ; X).

Measurements. Total length, 11.3; head length, 3.0; head width, 2.9; length of pronotum, 2.4; width of pronotum at base, 5.1; maximum width of pronotum at humeral angle, 5.8; length of scutellum, 3.6; width of scutellum, 4.0; width of abdomen across third segment, 6.8.

Etymology. prionotus , from the Greek, prionotos, meaning denticulate, serrate, in reference to the unique characteristic of the lateral margins of mandibular plates and humeral angles.

Distribution. Colombia.

Remarks. Male unknown.

Figures

FIGURES 48 – 53. Braunus prionotus Barão & Garbelotto sp. nov. 48 – 49. habitus; 48. dorsal view; 49. ventral view; 50. head, dorsal view; 51. external scent efferent system; 52 – 53. genital plates. Abbreviations: ev = evaporatorium; gc 8 = gonocoxites 8; gc 9 = gonocoxites 9; g 8 = gonapophyses 8; la 8 = laterotergites 8; la 9 = laterotergites 9; ms = mesopleura; mt = metapleura; o = ostiole; X = abdominal segment X. Scale bars: 48 – 49 = 2 mm; 50 – 53 = 1 mm.

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.