Paramecocephala guianensis Frey-da-Silva and Grazia, 2002

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 : 2738-2741

Paramecocephala guianensis Frey-da-Silva and Grazia, 2002

( Figures 11f , 12f , 13k , 21 , 29 ; Table 2)

Paramecocephala guianensis Frey-da-Silva, Grazia and Fernandes, 2002a: 222–223 , figs 1, 8, 15, 22, 29, 36, 56.

Table 2. Morphometric parameters of Paramecocephala species, in millimetres.

Measurements Antenna Species HL HW HLE CL IOD A1 A2 A3 A4 A5 Paramecocephala australis 2.94 ± 0.12 (2.70–3.21) 38 2.49 ± 0.09 (2.40–2.85) 38 1.75 ± 0.07 (1.60–1.90) 35 1.81 ± 0.10 (1.59–2.01) 38 1.46 ± 0.07 (1.26–1.62) 38 0.71 ± 0.04 (0.60–0.81) 38 0.59 ± 0.04 (0.51–0.66) 38 1.27 ± 0.06 (1.17–1.41) 38 1.10 ± 0.04 (1.05–1.20) 21 1.38 ± 0.04 (1.35–1.44) 13 Paramecocephala bachmanni 2.70 1 2.55 1 1.56 1 1.59 1 1.50 1 0.66 1 0.54 1 1.20 1 1.02 1 1.41 1 Paramecocephala bergrothi 3.59 ± 0.19 (3.30–4.18) 19 2.96 ± 0.15 (2.70–3.42) 18 2.20 ± 0.11 (2.09–2.46) 19 2.22 ± 0.13 (2.01–2.58) 19 1.77 ± 0.12 (1.59–2.09) 19 0.80 ± 0.07 (0.69–0.90) 19 0.58 ± 0.04 (0.51–0.66) 16 1.63 ± 0.09 (1.50–1.74) 16 1.36 ± 0.08 (1.20–1.50) 10 1.76 ± 0.07 (1.65–1.86) 7 Paramecocephala foveata 2.80 2 2.54 2 1.95 1 0.96 1 1.67 2 0.73 2 0.44 2 1.65 2 1.13 1 1.22 1 Paramecocephala fusca 2.54 ± 0.07 (2.46–2.61) 5 2.09 ± 0.08 (2.01–2.19) 5 1.63 ± 0.09 (1.50–1.74) 5 1.64 ± 0.05 (1.56–1.68) 5 1.26 ± 0.06 (1.20–1.35) 5 0.62 ± 0.04 (0.60–0.69) 5 0.45 ± 0.04 (0.39–0.48) 5 1.09 ± 0.09 (0.96–1.20) 5 0.95 ± 0.05 (0.90–0.99) 3 1.20 2 Paramecocephala guianensis 2.68 2 2.17 2 1.74 1 1.80 1 1.28 2 0.62 2 0.55 2 1.45 2 1.02 1 1.14 1 Paramecocephala subsolana 3.05 ± 0.10 (2.91–3.15) 5 2.39 ± 0.12 (2.25–2.55) 5 1.94 ± 0.07 (1.86–2.01) 5 1.91 ± 0.07 (1.80–1.95) 5 1.43 ± 0.08 (1.35–1.50) 5 0.65 ± 0.05 (0.60–0.69) 5 0.56 ± 0.05 (0.48–0.60) 5 1.15 ± 0.06 (1.05–1.20) 5 1.14 1 - Paramecocephala uruguayensis 3.45 ± 0.15 (3.30–3.60) 3 3.00 ± 0.00 (3.00–3.00) 3 1.98 ± 0.14 (1.82–2.09) 3 2.20 ± 0.09 (2.10–2.25) 3 1.85 ± 0.09 (1.80–1.95) 3 0.77 ± 0.03 (0.75–0.81) 3 0.58 ± 0.03 (0.54–0.60) 3 1.62 ± 0.11 (1.50–1.71) 3 1.29 1 1.68 1 Paramecocephala sp nov. 2.38 1 2.00 1 1.71 1 1.50 1 1.11 1 0.50 1 0.45 1 1.12 1 1.00 1 - Measurements Labium

Species L1 L2 L3 L4 LP PW LS SW BL BW Paramecocephala australis 1.32 ± 0.08 (1.20–1.50) 38 3.02 ± 0.20 (2.55–3.36) 38 2.63 ± 0.20 (2.25–3.00) 35 2.14 ± 0.12 (1.86–2.40) 35 3.37 ± 0.16 (3.30–3.65) 38 7.04 ± 0.29 (6.30–7.50) 38 5.26 ± 0.30 (4.50–5.75) 38 4.70 ± 0.36 (4.00–5.75) 38 14.39 ± 0.73 (12.88–16.25) 38 7.49 ± 0.34 (6.62–8.12) 38 (Continued)

Labium Species L1 L2 L3 L4 LP PW LS SW BL BW Paramecocephala bachmanni 1.12 2.03 1.50 1.35 2.65 6.00 4.65 4.00 12.12 6.88 2 2 2 2 1 1 1 1 1 1 Paramecocephala bergrothi 1.55 ± 0.11 3.95 ± 0.24 3.52 ± 0.24 2.91 ± 0.14 3.83 ± 0.20 8.64 ± 0.31 6.15 ± 0.47 5.12 ± 0.44 17.88 ± 0.75 8.95 ± 0.57 (1.33–1.71) (3.61–4.56) (3.23–4.10) (2.74–3.23) (3.40–4.15) (7.89–8.96) (4.37–6.65) (3.61–5.50) (16.25–19.38) (7.75–10.00) 19 18 18 18 19 19 19 19 19 19 Paramecocephala foveata 1.42 3.52 3.32 2.54 2.62 6.32 4.79 4.35 13.14 7.14 2 2 2 2 2 2 2 2 2 2 Paramecocephala fusca 1.13 ± 0.07 2.53 ± 0.20 2.14 ± 0.17 1.77 ± 0.15 2.14 ± 0.14 5.82 ± 0.18 4.26 ± 0.20 3.91 ± 0.19 11.91 ± 0.40 6.47 ± 0.33 (1.02–1.20) (2.25–2.70) (1.95–2.40) (1.65–2.01) (1.90–2.25) (5.52–6.00) (4.00–4.50) (3.60–4.10) (11.50–12.25) (6.00–6.75) 5 5 5 5 5 5 5 5 4 4 Paramecocephala guianensis 1.05 2.85 2.55 1.95 2.08 5.62 4.15 3.62 12.04 6.00 1 1 1 1 2 2 2 2 2 2 Paramecocephala subsolana 1.36 ± 0.05 3.03 ± 0.16 2.91 ± 0.24 2.45 ± 0.23 2.61 ± 0.33 6.04 ± 0.63 4.73 ± 0.35 4.22 ± 0.28 13.85 ± 1.09 7.03 ± 0.60 (1.29–1.44) (2.85–3.30) (2.70–3.24) (2.25–2.70) (2.25–3.15) (5.10–6.60) (4.25–5.15) (3.75–4.50) (12.50–15.00) (6.25–7.50) 5 5 5 5 5 5 5 5 4 4 Paramecocephala uruguayensis 1.50 ± 0.00 3.88 ± 0.18 3.24 ± 0.35 2.60 ± 0.11 2.93 ± 0.26 7.96 ± 0.52 6.08 ± 0.52 5.22 ± 0.30 17.83 ± 0.85 8.96 ± 0.72 (1.50–1.50) (3.69–4.05) (2.91–3.60) (2.49–2.70) (2.65–3.15) (7.38–8.40) (5.50–6.50) (4.90–5.50) (16.88–18.50) (8.12–9.38) 3 3 3 3 3 3 3 3 3 3 Paramecocephala sp. nov. 1.41 3.00 2.85 2.40 - - - - 13.75 6.25 1 1 1 1 1 1

Type material examined. FRENCH GUYANA: MONTSINÉRY: Holotype, m*, San Bordelaise, 4 July 1977, Reémillet leg. // Orstom ( USNM) <illustrated specimen> .

Diagnosis. Body colour dark brown. Apex of mandibular plates sinuous. Clypeus uniformly wider ( Figure 11f ). Anterolateral margins of pronotum straight; outline smooth, punctate ( Figure 11f ). 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 concave; evaporatorium on mesopleuron not reaching the posterolateral angles ( Figure 13k ). Fovea equal to the diameter of a compound eye ( Figure 21a ). Legs concolourous with body ventral colour ( Figure 21b ). Hemelytra surpassing apex of body ( Figure 21a ). Trichobothria lateral to the imaginary longitudinal line tangent to the spiracles.

Male genitalia. Pygophore sub-quadrangular, posterolateral angles quadrate ( Figure 21d–g ). Genital cup narrow, occupying less than half the length of pygophore. Superior processes of dorsal rim present; median region of dorsal rim notched, and extension of dorsal rim obsolete ( Figure 21d–e ). Area between layers of ventral rim excavated. Superior layer of ventral rim covering parameres, without processes ( Figure 21f ). Inferior layer of ventral rim with a pair of processes ( Figure 21g ).

Female genitalia. Valvifers 8 smaller than laterotergites 9, posterior margins sinuous. Posterior margins of laterotergites 8 obtusely projected. Posterior margins of valvifers 9 straight. Laterotergites 9 surpassing the abdominal tergite 8 ( Figure 21h ).

Measurements. See Table 2.

Distribution. Guiana (Rapununi) and French Guiana (Montsinéry) ( Figure 29 ).

Remarks. See Frey-da-Silva et al. (2002a), p. 222–223 for description.

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 21. Paramecocephala guianensis Frey-da-Silva and Grazia, 2002. (a–c) Habitus of holotype in dorsal, ventral and lateral view; (d–e) pygophore in dorsal view; (f–g) pygophore in posterior and ventral view; (h) genital plates, reinterpretation of the illustration by Schwertner et al. 2002. Abbreviations: alvr – area between layers of ventral rim; ilvr – inferior layer of ventral rim of pygophore; la8 – laterotergites 8; la9 – laterotergites 9; pilvr – process of inferior layer of ventral rim; slvr – superior layer of ventral rim of pygophore; vf8 – valvifers 8; vf9 – valvifers 9; x – segment X. Scale bars: a–c = 2.0 mm; d, f–g = 1.0 mm; h = 0.5 mm.

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

Table 2. Morphometric parameters of Paramecocephala species , in millimetres.