Luridocimex Grazia, Fernandes & Schwertner, 1998

Barros, Lurdiana D., Barão, Kim R. & Grazia, Jocelia, 2021, Taxonomic updates on the Mecocephala group (Hemiptera: Pentatomidae) Redescription of ‘ Hypatropis complex’, with a review of genitalic terminology and new records, Zootaxa 4981 (1), pp. 1-46 : 23

Luridocimex Grazia, Fernandes & Schwertner, 1998

Luridocimex Grazia, Fernandes & Schwertner, 1998: 161–166 ; Frey-da-Silva et al. 2002: 181.

Type species. Luridocimex wygodzinskyi Grazia, Fernandes & Schwertner, 1998 by monotypy.

Diagnosis. Antennomere 4 cylindrical and convex dorsally. Mesosternum grooved. Inferior layer of ventral rim of pygophore with a process. Valvifers 9 depressed. Posterior margins of laterotergites 8 acutely projected. Laterotergites 9 convergent.

Redescription. Body oblong ( Figs 114 , 136–137 ). General coloration yellowish-brown. Dorsal surface of body flattened dorsoventrally ( Fig. 18 ). Dorsal body surface with dense and ferruginous punctuation, ventrally, in more numbers. Mandibular plates longer than clypeus; lateral margins of mandibular plates sinuous; mesial margins of mandibular plates contiguous in relation to the clypeus, apically convergent ( Fig. 3 ). Clypeus wider basally. Antennomere 2 smaller than 1; antennomere 3 cylindrical and dorsally convex; antennomere 4 cylindrical, convex dorsally. Bucculae tapering toward base of head, not reaching its base. Labiomere 2 cylindrical and smaller than 3 and 4 combined in length ( Fig. 7 ). Anterolateral margins of pronotum convex, with outline concolour to pronotum and evenly punctate. Posterolateral margins of pronotum sinuous. Posterior margin of pronotum slightly convex ( Figs 3 , 114 , 136 ). Mesosternum with longitudinal groove. Each ostiole of ESES guttiform; periostiolar depressions present ( Fig. 138 ). Callosity at apex of radial vein pale yellow, small or faint ( Figs 137, 139 ). Membranal suture sub-rectilinear. Connexivum exposed, angles brown. Spiracles circular, black ( Figs 18 , 137, 139 ). Trichobothria laterally to the imaginary line tangent to the spiracles.

Male genitalia. Pygophore subquadrangular, as wide as long. Segment X “pear-shaped”, with tumescent processes basally ( Figs 33–35 , 140–142 ).

Female genitalia. Valvifers 8 convex. Each lateral margins of valvifers 9 with process, partially covering the laterotergites 9, forming a constriction. Laterotergites 9 surpassing abdominal tergite 8 ( Fig. 50 ).

Distribution. Brazil (Rio de Janeiro) ( Fig. 184 ).

Figures

FIGURE 184. Occurrence records of the species of Stysiana, Luridocimex and Pedinonotus.

FIGURES 112–114. Amauromelpia Fernandes & Grazia, 1998 and Luridocimex Grazia, Fernandes & Schwertner, 1998. Holotype, habitus dorsal. 112: A. miri; 113: A. ussu; 114: L. wygodzinskyi. Scale bars = 1.0 mm.

FIGURES 136–142. Luridocimex Grazia, Fernandes & Schwertner, 1998. 136–137: Habitus dorsal and ventral; 138: Evaporatorium; 139: Spiracles; 140–142: Pygophore in dorsal, posterior and ventral view. Abbreviations: ev, evaporatorium. Scale bars = 136–137: 1.0 mm; 139: 0.5 mm; 140–142: 0.25 mm.

FIGURES 13–20. Head and pronotum in ventral view and habitus lateral. 13: Hypatropis inermis; 14: Hypatropis rolstoni; 15–16: Amauromelpia ussu; 17–18: Luridocimex wygodzinskyi; 19–20: Stysiana pardidens. Scale bars = 0.5 mm.

FIGURES 1–12. Head and pronotum. 1–4: dorsal view; 5–8: detail of anterior angles of pronotum; 9–12: lateral view. 1, 5: Hypatropis inermis; 9: Hypatropis australis; 2, 6, 10: Amauromelpia ussu; 3, 7, 11: Luridocimex wygodzinskyi; 4, 8, 12: Stysiana acarinatis. Abbreviations: aap, anterior angle of pronotum. Scale bars = 0.5 mm.

FIGURES 27–38. Male genitalia. Pygophore in dorsal, posterior and ventral view, respectively. 27–29: Hypatropis inermis; 30–32: Amauromelpia ussu; 33–35: Luridocimex wygodzinskyi: 36-38: Stysiana pardidens. Abbreviations: dr, dorsal rim; ilvr, inferior layer of ventral rim; slvr, superior layer of ventral rim; spp, superior process of pygophore; vr, ventral rim. Scale bars = 0.5 mm.

FIGURES 48–51. Female genitalia. Genital plates in posteroventral view. 48: Hypatropis australis; 49: Amauromelpia miri; 50: Luridocimex wygodzinskyi: 51: Stysiana pardidens. Abbreviations: la8, laterotergites 8; la9, laterotergites 9; vf8, valvifers 8; vf9, valvifers 9. Scale bars = 0.5 mm.