Amauromelpia Fernandes & Grazia, 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 : 20-22

Amauromelpia Fernandes & Grazia, 1998

Amauromelpia Fernandes & Grazia, 1998a: 153–160 ; Frey-da-Silva et al. 2002: 181; Barão et al. 2017: 110; Silva et al. 2018: 427 .

Type species. Amauromelpia ussu Fernandes & Grazia, 1998 .

Diagnosis. Clypeus uniformly wide. Anterolateral margins of pronotum concave. Segment X ogival (rectangular with arcuate apex), with tumescent processes medially. Ductus seminis distalis extremely long. Valvifers 8 at least twice longer than laterotergites 9. Posterior margins of gonocoxites 9 emarginate.

Redescription. Body elliptical ( Figs 112–113 , 115–125 , 126–134 ). General coloration brown to dark-brown, dark-brown ventrally. Dorsal and ventral surface of body slightly convex. Dorsal surface with dense and dark punctation, ventrally concentrated and smaller on sternites. Mandibular plates equal or shorter than the clypeus; lateral margins of mandibular plates sinuous, levelled in relation to the plan of mesial margins. Clypeus uniformly wide. Proportions of antennomeres: 1> 2 <3> 4 <5 ( Figs 15 , 115 , 126 ); antennomere 3 cylindrical and dorsally convex; antennomere 4 conical, slightly flattened dorsally. Bucculae tapering toward base of head, reaching its base ( Fig. 118 ). Median labium, reaching between the metacoxae ( Figs 15 , 116 , 127 ). Proportions of labiomeres: 1 <2> 3> 4; labiomere 2 cylindrical and smaller than 3 and 4 combined. Processes of anterior angles of pronotum obtuse ( Figs 2 , 115 , 126 ). Anterolateral margins of pronotum concave and anteriorly declivent ( Figs 10 , 16 ), with outline concolour with pronotum and evenly punctate ( Figs 2, 6 , 117 ). Posterolateral margins of pronotum sinuous. Posterior margin of pronotum slightly convex. Mesosternum carinate and metasternum flat. Each ostiole of ESES elliptical; periostiolar depressions present; each peritreme reaching about 2/3 of the distance to lateral margin of evaporatorium; median furrow of the peritreme long, reaching more than half of peritreme; evaporatorium impunctate, reaching more than half of mesopleuron and metapleuron, and present in a diagonal from mesepimeron to mesepisternum. Outer margin of metapleural evaporatorium concave. Evaporatorium on mesopleuron reaching its anterior and posterior lateral angles, and the outer margin. Gyrification of evaporatorium with high wrinkles. Metathoracic spiracle wide ( Figs 22, 25 ). Callosity at apex of radial vein pale yellow. Membranal suture sub-rectilinear. Hemelytral membrane surpassing or not the abdominal apex. Connexivum exposed, angles not concolour to dorsal color ( Figs 112–113 , 115–116 , 126–127 ). Posterolateral angles of sternites obtusely produced. Spiracles circular, spiracle of abdominal sternite 2 not covered by metathorax ( Fig. 128 ). Mesial area adjacent to spiracles without callosity (inconspicuous) ( Figs 16 , 119 , 128 ). Trichobothria separated by an imaginary line tangent to the spiracles.

Male genitalia. Pygophore subquadrangular, as wide as long. Middle region of dorsal rim notched. Extension of dorsal rim obsolete. Area between layers of ventral rim depressed or excavated, not separated by a carina. Each lateral margin of superior layer of ventral rim entire, in superior view. Inferior layer of ventral rim with a pair of processes. Segment X ogival, carinate or not, with tumescent processes medially ( Figs 30–32 , 120–122 ). Phallus ( Figs 42–44 , 123–125 , 129–132 ): Dorsal connectives of articulatory apparatus shorter or longer in relation to distal margin of phallotheca. Processus capitati long, reaching phallotheca distal margin. Phallotheca shorter than wide apically; dorsal process of phallotheca of variable width in species, longer than posterodorsal projection. Conjunctiva with two pairs of processes, and three pairs of lobes, membranous. Ductus seminis distalis extremely long in relation to conjunctiva.

Female genitalia. Valvifers 8 convex, at least twice longer than laterotergites 9. Valvifers 9 swollen, with anterior margins straight and posterior margins emarginate; esclerotized lateral arms attaining the anterior margins of laterotergites 9, and each lateral margin with 1+1 processes, partially covering the laterotergites 9, forming a constriction. Posterior margins of valvifers 8 obtusely projected. Posterior margins of laterotergites 9 obtusely projected ( Figs 49 , 133 ). Ring sclerites inflated. Ectodermal ductus ( Figs 53 , 134 ): Ductus receptaculi uniform in diameter; proximal ductus receptaculi straight, extremely long, at least three times longer than vesicular area. Distal ductus receptaculi convolute, extremely long, at least five times longer than vesicular area. Anterior annular flange smaller than pars intermedialis and posterior annular flange wider in relation to capsula seminalis. Capsula seminalis globose, with or without process.

Distribution. Costa Rica (Taboga); Venezuela (Barinas <new record>); French Guyana; Brazil (Pará, and Amazonas); Peru (Loreto, and San Martín <new record>); Bolivia (Beni) ( Fig. 135 ).

Key to species of Amauromelpia Fernandes & Grazia, 1998

1 Mandibular plates as long as clypeus. Anterolateral margins of pronotum serrate. Posterolateral angles of pygophore quadrate. Genital cup occupying less than half of pygophore length. Area between layers of ventral rim depressed. Segment X carinate ( Figs 120–122 ). Dorsal processes of phallotheca wider at the base, curved ( Figs 123–125 ). Posterior margins of valvifers 9 straight. Mesial margins of laterotergites 9 convergent................................................... A. miri

- Mandibular plates shorter than clypeus. Anterolateral margins of pronotum crenulated. Posterolateral angles of pygophore rounded. Genital cup occupying more than half of pygophore length. Area between layers of ventral rim excavated. Segment X not carinate ( Figs 30–32 ). Dorsal processes of phallotheca narrower at the apex, folded up ( Figs 129–132 ). Posterior margins of valvifers 9 sinuous. Mesial margins of laterotergites 9 divergent......................................... A. ussu

Figures

FIGURE 135. Occurrence records of the species of Amauromelpia.

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 115–125. Amauromelpia miri Fernandes & Grazia, 1998. 115–116: Habitus dorsal and ventral; 117–118: Head, dorsal and lateral view; 119: Spiracles; 120–122: Pygophore in dorsal, posterior and ventral view; 123–125: Phallus in dorsal, lateral, ventral and posterolateral view. Abbreviations: prX, process of segment X. Scale bars = 115–116, 119, 120–122: 1.0 mm; 117–118: 0.5 mm; 123–125: 0.25 mm.

FIGURES 126–134. Amauromelpia ussu Fernandes & Grazia, 1998. 126–127: Habitus dorsal and ventral; 128: Spiracles; 129–132: Phallus in dorsal, lateral, ventral and posterolateral view. Abbreviations: pcj, processes of conjunctiva; pi, pars intermedialis; st, secondary thickenings of valvulae 9; va, vesicular area. Scale bars = 126–127: 1.0 mm; 129–134: 0.50 mm. Ductus not preserved.

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 21–26. SEM images of external scent efferent system of metasternal glands. 21–26: evaporatorium; 24–26: detail of evaporatorium. 21, 24: Hypatropis sternalis; 22, 25: Amauromelpia ussu; 23, 26: Stysiana acarinatis. Abbreviations: am, anterolateral margin; ev, evaporatorium; ms, mesopleuron; mt, metapleuron; o, ostiole; om, outer margin; per, peritreme; pod, periostiolar depression. Scale bars = 21–23: 500 μm; 24–26: 100 μm.

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 39–47. Generalized scheme of Phallus. 39–41: Generalized scheme of Hypatropis. 42–44: Amauromelpia ussu; 45–47: Generalized scheme of Stysiana. Abbreviations: aa, articulatory apparatus; cj, conjunctiva; dc, dorsal connectives; dpph, dorsal process of phallotheca; mlcj, median lobe of conjunctiva; pc, processus capitati; pcj, process of conjunctiva; pdpph, posterodorsal projection of phallotheca; ph, phallotheca; plppha, posterolateral projection of phallotheca; pve, process of vesicae; vbpph, ventrobasal projection of phallotheca; vlcj; ventral lobe of conjunctiva. Scale bars = 0.2 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.

FIGURES 52–54. Female receptaculum seminis and aussenwand. 52, Hypatropis inermis; 53, Amauromelpia ussu; 54, Stysiana meridionalis. Abbreviations: aaf, anterior annular flange; cs, capsula seminalis; ddr, distal ductus receptaculi; paf, posterior annular flange; pdr, proximal ductus receptaculi; pi, pars intermedialis; la9, laterotergites 9; rs, ring sclerite; tvi, thickening of vaginal intima; va, vesicular area; va9, valvulae 9; vf9, valvifers 9; X, abdominal segment X. Scale bars = 52, 54: 0.5 mm; 53, 1.0 mm.