Hypanthracos, Grazia & Campos, 1996

BARROs, Lurdiana D., Barão, Kim R. & Grazia, Jocélia, 2020, Systematics of the Mecocephala group (Hemiptera: Heteroptera: Pentatomidae) based on a phylogenetic perspective: Inclusion of Hypanthracos, description of three new genera, and redescription of Ogmocoris, Arthropod Systematics & Phylogeny 78 (2), pp. 321-360 : 331-334

Hypanthracos meridionalis Grazia & Campos, 1996

Figs. 4 A– C, 5A– K, 17, 18A, Fi, H

Hypanthracos meridionalis Grazia & Campos, 1996: 15‒16, figs 1, 3, 5 – 8, 13– 15, 19, 21; RUSCHEL et al. (2013: 552).

Diagnosis. Clypeal suture beginning before an imaginary line crossing anterior margin of compound eyes. Bucculae sub-rectilinear. Outline of anterolateral margins of prono-tum flat. Humeral angles strongly developed into spinous processes. Basal angles of scutellum foveate, foveae smaller than the diameter of a compound eye. The outer margin of each metapleural evaporatorium is straight; gyrification of evaporatorium with low wrinkles. Sublat-eral margins of sternites concolourous with abdominal venter. Spiracles concolourous with sublateral margins of abdominal sternites. Genital cup narrow, open dorsally, occupying less than half the length of pygophore. Dorsal rim of pygophore with 1 + 1 dorsal processes; extension of dorsal rim well-developed over the segment X. Supe-rior layer of ventral rim without processes; lateral margin of each projection of superior layer of ventral rim entire. Inferior layer of ventral rim without process. Segment X quadrangular, without process. Parameres absent. Phal-lotheca destitute of dorsal processes and rounded postero-lateral projections. Conjunctiva with three pairs of lobes, apically sclerotized.

Redescription. Measurements: Table 4. Colouration: General colouration castaneous dorsally and dark cas-taneous to black ventrally. Dorsal and ventral surface of body with dense and dark-castaneous to black punctures. Head dark castaneous, brown punctate on basal half, con-colourous apex. Antennomeres uniformly dark castane-ous, black on distal half of antennomere 4 ( Figs. 4 A– B, 18Fi). Labium castaneous, apical labiomeres dark cas-taneous. Outline of anterolateral margins of pronotum black; dark castaneous punctate. Pro-, meso-, metaster-num including evaporatorium dark castaneous to black. Legs castaneous, distal half of femora dark castaneous to black ( Fig. 4B ). Head ( Figs. 4A , 18A ): Head longer than wide, apex rounded; mandibular plates obtuse and con-vex apically; clypeal apex obtuse, clypeal suture begin-ning before an imaginary line crossing anterior margin of compound eyes; anteocular processes absent; antennifer-ous tubercles visible in dorsal view, each with an obtuse process laterally. Proportions of antennomeres: 1> 2 <3> 4, 5 missing. Bucculae subrectilinear. Thorax: Pro-notum trapezoidal ( Figs. 4A , 18A ); anterior angles pro-duced; outline of anterolateral margins concave, smooth, flat, not reflexed, impunctate; humeral angles strongly developed, into spinous processes, directed anteriorly; posterior margin rectilinear. Mesosternal carina elevat-ed, smooth; metasternal furrow shallow. Each ostiole of ESES elliptical, opening posterolaterally; periostiolar de-pressions present; each peritrema spout-shaped, occupy-ing about 2/3 of the distance to lateral margin of evapo-ratorium; medial furrow of the each ostiolar peritreme relatively long, occupying more than half of the length of peritreme; evaporatorium punctate, each occupying less than half of meso- and metapleuron; gyrification of evap-oratorium with low wrinkles; anterolateral margin of each evaporatorium tapered; outer margin of each metapleural evaporatorium straight; evaporatorium on mesopleuron not reaching its anterior and posterior lateral angles, and the outer margins, as well as the anterior limits of me-socoxal sutures ( Fig. 18H ). Metathoracic spiracle wide. Length of femora and tibiae subequal; femora unarmed; tarsi 3-segmented. Scutellum longer than wide ( Fig. 4A ). Basal angles of scutellum foveate; foveae smaller than the diameter of a compound eye. Corium longer than scutellum, surpassing apices of abdominal tergite 5; apex of each radial vein punctate (inconspicuous callosity). Membrane with veins linear. Hemelytra surpassing apex of abdomen. Abdomen: Connexivum exposed; poste-rolateral angles of each connexivum obtusely produced ( Fig. 4A ). Male terminalia: Pygophore trapezoidal ( Fig. 5 A– F); posterolateral angles rounded. Genital cup nar-row, open dorsally, occupying less than half the length of pygophore; dorsal rim medially entire with 1 + 1 dorsal processes; extension of dorsal rim well-developed over segment X; ventral rim forming two layers, inferior and superior layers of ventral rim, not separated by a carina; area between layers excavated. Superior layer of ventral rim projecting toward genital cup, developed laterally to segment X, without processes and lateral margin of each projection of superior layer of ventral rim entire ( Fig. 5B, E ). Inferior layer of ventral rim without processes ( Fig. 5C ). Segment Xquadrangular, not carinate, without pro-cesses. Parameres absent. Male genitalia: Phallus ( Fig. 5G – I ): Dorsal connectives of articulatory apparatus long, in relation to distal half of phallotheca. Processus capitati long, reaching phallotheca distal margin. Phal-lotheca piriform, longer than wide apically, without a pair of dorsal processes, and with two pairs of projec-tions: 1 + 1 on posterodorsal margin and 1 + 1 ventroba-sal. Conjunctiva with two pairs of processes and three pairs of lobes: lateral, median, and ventral lobes, apically sclerotized. Process of vesica long. Ductus seminis dista-lis extremely long, at least four times longer than the con-junctiva, convolute. Female terminalia ( Fig. 5J ): Valvifers 8 convex, subequal in length to laterotergites 9, partially covering valvifers 9; mesial margins juxta-posed, posterior margins sinuous; valvulae 8 not visible in ventral view. Laterotergites 8 with posterior margins acutely projected; spiracles absent. Valvifers 9 swollen, leveled, relative to the position of segment X, with ante-rior margins straight and posterior margins concave. Lat-erotergites 9 triangular, obtusely projected apically, not surpassing tergite 8. Female genitalia: Valvulae 9 with 1 + 1 medially sclerotized areas. Ring sclerite elliptical. Ectodermal ductus ( Fig. 5K ): proximal ductus receptacu-li convoluted, long in relation to length of vesicular area, at least two times longer; equal diameter. Median wall of vesicular area enlarged subproximally. Distal ductus re-ceptaculi convoluted, long, at least two times longer than vesicular area, with diameter equal to median wall of ve-sicular area diameter. Annular flanges divergent. Capsula seminalis wider than posterior annular flange, globose, equal in relation to the length of pars intermedialis. Pars intermedialis enlarged.

Type material: Holotype ♀, ‘ URUGUAY, | Artigas, 17.xi.1955, F H C leg.’ ( MACN). – Paratypes: ♀, ‘ BRAZIL, Rio Grande do Sul, Osório, Capão Alto , 13.ii.1965, L Buckup leg.’ | ‘2854’ ( MCNZ) <illustrated specimen>. ♂, ‘ URUGUAY, Artigas, Potrero Sucio-Arroyo Tres Cruces , 17.ii.1955, F H Y C leg.’ ( UFRG) <il-lustrated specimen> .

Comments. Adetailed description of the external scent efferent system, an update of the terminology of male genitalia, photographs of paratypes and of terminalia and genitalia for both sexes, and a distribution map for H. meridionalis are provided.

In addition to this species, H. ditarsus is also known, not examined here for lack of material. H. ditarsus can be distinguished mainly by the morphology of the geni-talia of both sexes and by tarsi 2-segmented. ( GRAZIA

& CAMPOS 1996). H. ditarsus holotype is deposited in the MZUSP ( GRAZIA & CAMPOS 1996; CARRENHO et al. 2020).

Distribution. Brazil: Rio Grande do Sul and Uruguay: Artigas ( Fig. 17 ).

Figures

Fig. 4. Hypanthracos meridionalis Grazia & Campos, 1996: A: dorsal; B: ventral; C: lateral. Scale bars = 2.0 mm.

← Fig. 18. Representation and comparison of head and thoracic characters. A–C: head, dorsal view; D–E: head and prothorax, lateral view (antennomeres not showing due to edition of photo); F: schematic drawing showing the antennomeres; G–S: external scent efferent system; G–N: meso- and metapleura, ventral view; G: schematic drawing showing the parts of eses; O–S: SEM images of characters of eses of mestasternal glands. — (A, Fi, H): Hypanthracos meridionalis; (B, N): Mecocephala magna; (C): Paramecocephala foveata; (D, M): Tibraca limbativentris; (E, S): Hypatropis inermis; (Fii, I): Chimerocoris luridus; (Fiii, J): Ogmocoris hypomelas; (Fiv, K): Liscocephala fumosa; (Fv, L): Triunfus carvalhoi; (O): Glyphepomis adroguensis; (P): Paramecocephala fusca; (Q): Pedinonotus catarinensis; (R): Glyphepomis setigera; Scale bars: A–E, H–N = 0.5 mm; O–S = 100 μm.

→ Fig. 5. Hypanthracos meridionalis Grazia & Campos, 1996: A–F: male terminalia: A–D: dorsal; B–E: posterior: C–F: ventral; G–I: male genitalia: G: dorsal; H: lateral; I: ventral; J: female terminalia; K: female receptaculum seminis and ausenwand. Scale bars: A–F = 1.0 mm; G –I: 0.01 mm; J–K = 0.5 mm.

Fig. 17. Map of geographical distribution. — Colors: yellow – Chimerocoris luridus sp.n.; purple – Hypanthracos meridionalis; red – Liscocephala fumosa sp.n.; green – Ogmocoris Mayr, 1864; blue – Triunfus gen. n.