Paramecocephala uruguayensis ( Pirán, 1970 )

de Barros, Lurdiana Dayse, Barão, Kim Ribeiro & Grazia, Jocelia, 2022, Taxonomic updates on the Mecocephala group (Hemiptera: Pentatomidae): redescription of Mecocephala Dallas and Paramecocephala Benvegnú, Journal of Natural History (J. Nat. Hist.) 55 (43 - 44), pp. 2691-2747 : 2742-2743

Paramecocephala uruguayensis ( Pirán, 1970)

( Figures 11h , 12h , 13m , 23 , 27j–l , 28f , 29 ; Table 2)

Mecocephala uruguayensis Pirán, 1970: 124 , I am. II, figs 1, 2.

Paramecocephala uruguayensis Schwertner et al. 2002: 183 ; Frey-da-Silva et al. 2002a: 223– 224, figs 1, 10, 17, 24, 31, 38, 42, 46, 50, 58, 63; Coscarón 2017: 230.

Type material examined. URUGUAY: MONTEVIDEO: Holotype, m*, Santiago Vásquez, Parque Lecoq ., 15 March 1960, C.S. Morey leg. // Coll. Pirán ( MACN), <photo examined> . Paratypes, ARGENTINA: BUENOS AIRES: m*, Zelaria, November 1962, J.B. Daguerre leg. ( UFRG), <illustrated specimen> . URUGUAY, MONTEVIDEO: f*, Santiago Vásquez, 21 Octuber 1960 // en Caraguatá ( UFRG), <illustrated specimen> .

No data: f* ( UFRG).

Diagnosis. Body colour brown to greyish-dark brown. Apex of mandibular plates convex. Clypeus wider apically ( Figure 11h ). Anterolateral margins of pronotum straight; outline crenulate, not punctate ( Figure 11h ). Each peritreme of ESES reaching about half of the distance to lateral margin of evaporatorium, median furrow of each peritreme short, reaching less than half of peritreme; outer margins of metapleural evaporatorium straight; evaporatorium on mesopleuron not reaching the posterolateral angles and outer margin; gyrification of evaporatorium with low wrinkles ( Figure 13m ). Foveae smaller than the diameter of a compound eye ( Figure 23a ). Legs concolourous with body ventral colour ( Figure 23b ). Hemelytra surpassing apex of body ( Figure 23a ). Trichobothria lateral to the imaginary longitudinal line tangent to the spiracles.

Male genitalia. Pygophore trapezoidal, posterolateral angles rounded ( Figure 23d–f ). Genital cup broad, occupying more than half the length of pygophore. Median region of dorsal rim entire, and extension of dorsal rim obsolete ( Figure 23d ). Area between layers of ventral rim excavated. Superior layer of ventral rim covering parameres, with two pairs of processes ( Figure 23e ). Inferior layer of ventral rim with a pair of tiny processes processes ( Figure 23f ). Phallus ( Figure 27j–l ): Dorsal connectives long, surpassing the distal half of phallotheca. Processus capitati long, surpassing the phallotheca distal margin. Conjunctiva with two pairs of processes, each acute apically, and three pairs of lobes, lateral and ventral membranous, and median sclerotised.

Female genitalia. Posterior margins of valvifers 8 sinuous. Posterior margins of laterotergites 8 straight, and with a process on each anterior angle. Anterior margins of valvifers 9 straight and posterior margins convex ( Figure 23g –h ). Laterotergites 9 surpassing the abdominal tergite 8. Diameter of proximal ductus receptaculi larger in relation to diameter of the inner wall of vesicular area. Annular flanges convergent related to each other. Capsula seminalis smaller than the pars intermedialis ( Figure 28f ).

Measurements. See Table 2.

Distribution. Argentina (Buenos Aires, and Corrientes) and Uruguay (Artigas, Montevideo, and Canelones) ( Figure 29 ).

Figures

Figure 11. Head and pronotum of Paramecocephala in dorsal view. (a) Paramecocephala australis; (b) Paramecocephala bachmanni; (c) Paramecocephala bergrothi; (d) Paramecocephala foveata; (e) Paramecocephala fusca; (f) Paramecocephala guianensis; (g) Paramecocephala subsolana; (h) Paramecocephala uruguayensis; (i) Paramecocephala helenae sp. nov. Scale bars = 0.5 mm.

Figure 12. Head and prothorax of Paramecocephala in lateral view. (a) Paramecocephala australis; (b) Paramecocephala bachmanni; (c) Paramecocephala bergrothi; (d) Paramecocephala foveata; (e) Paramecocephala fusca; (f) Paramecocephala guianensis; (g) Paramecocephala subsolana; (h) Paramecocephala uruguayensis; (i) Paramecocephala helenae sp. nov. Scale bars = 0.5 mm.

Figure 13. Thoracic external scent efferent system (ESES) of metasternal glands of Paramecocephala. (a–d) Paramecocephala australis; (e) Paramecocephala bachmanni; (f) Paramecocephala bergrothi; (g) Paramecocephala foveata; (h–j) Paramecocephala fusca; (k) Paramecocephala guianensis; (l) Paramecocephala subsolana; (m) Paramecocephala uruguayensis; (n) Paramecocephala helenae sp. nov. (a, e–g, k–n) meso- and metapleural in ventral view; (b–d, h–j) scanning electron microscopy images of characters of ESES of metasternal glands. Abbreviations: cx2 – mesocoxae; cx3 – metacoxae; ev – evaporatorium; ms – mesopleuron; mt – metapleuron; mts – metathoracic spiracle; o – ostiole; om – outer margin; pod – periostiolar depression. Scale bars: a, e–g, k–n = 0.5 mm; b, h = 500 µm; c–d, i–j = 200 µm.

Figure 23. Paramecocephala uruguayensis (Pirán, 1970). (a–c) Habitus in dorsal, ventral and lateral view; (d–f) pygophore in dorsal, posterior and ventral view; (g–h) genital plates in posteroventral and lateral view.Abbreviations: alvr – area between layers of ventral rim; ilvr – inferior layer of ventral rim of pygophore; mpdr – marginal process of dorsal rim of pygophore; slvr – superior layer of ventral rim of pygophore. Scale bars: a–c = 2.0 mm; d–f = 1.0 mm; g–h = 0.5 mm.

Figure 27. Phallus of Paramecocephala species in dorsal (left column), lateral (center column) and ventral (right column) view. Conjunctiva with two pairs of processes. (a–f) Paramecocephala bergrothi: (a–c) reddish variation; (d–f) melanic variation; (g–i) Paramecocephala fusca; (j–l) Paramecocephala uruguayensis. Abbreviations: aa – articulatory apparatus; cj – conjunctiva; dc – dorsal connective; dpph – dorsal process of phallotheca; dsd – ductus seminis distalis; mlcj – median lobe of conjunctiva; pcj – process of conjunctiva; pdpph – posterodorsal projection of phallotheca; ph – phallotheca; plpph – posterolateral projection of phallotheca; pve – process of vesica; vbpph – ventrobasal projection of phallotheca; vlcj – ventral lobe of conjunctiva. Scale bars = 1.0 mm.

Figure 28. Female receptaculum seminis and aussenwand of Paramecocephala species. (a) Paramecocephala australis; (b) Paramecocephala bergrothi; (c) Paramecocephala foveata; (d) Paramecocephala fusca; (e) Paramecocephala subsolana; (f) Paramecocephala uruguayensis. Abbreviations: aaf – anterior annular flanges; cs – capsula seminalis; ddr – distal ductus receptaculi; paf – posterior annular flange; pdr – proximal ductus receptaculi; pi – pars intermedialis; rs – ring sclerites; tvi – thickening of vaginal intima; va – vesicular area. Scale bars = 1.0 mm.

Figure 29. Map showing the geographical distribution of Mecocephala and Paramecocephala species. Yellow star = new record of P. subsolana.