Pachycoris torridus (Scopoli, 1772)

Schmitz, Luís Ricardo & Barcellos, Aline, 2018, Pachycoris torridus (Scopoli) and P. klugii Burmeister: a comparative study of the genital morphology of two polychromatic Pachycorinae (Heteroptera, Scutelleridae), Zootaxa 4531 (3), pp. 444-450 : 445-448

Pachycoris torridus (Scopoli, 1772)

(Figs. 2, 4, 6–7, 9, 11–12, 14, 16, 19–20)

Male. Pygophore pear-shaped to subquadrangular, depending on the expansion of the membranous basal area which occupies about two thirds of the dorsal surface. Dorsal median suprapygophoral process (Fig. 4) basally quadrangular, posterior half lanceolate, median elevation with rounded apex, surpassed by 1+1 lateral arms, each one with three apical projections (Fig. 16). When expanded, lateral arms move outward, making SPP appear trident-shaped (Fig. 7). Dorsal rim highly membranous, apparently expansible, allowing the movement of the SPP. Lateral margin of pygophore angled or slightly angled between the membranous basal area and the slerotized apical one (Fig. 9). Laterodorsally, 1 + 1 subtriangular areas densely pilose are positioned opposite to the parameres FIGURES 1–7. 1, 3, 5 P. klugii; 2, 4, 6– 7 P. torridus:1–2, genital plates, ventral view; 3–4, pygophore, dorsal view, 5–6, pygophore, posterior view; 7, pygophore of P. torridus with aedeagus expanded, posterior view (lt8, laterotergites 8; lt9, laterotergites 9; ph, phallus; pr, paramere; spp, suprapygophoral process; VII, seventh sternite; vf8, valvifer 8; vf9, valvifer 9). Scale bars = 1.5 mm (Figs. 1–2) and 1.0 mm (Figs. 3–7).

FIGURES 8–16. 8, 10, 13, 15 P. klugii; 9, 11–12, 14, 16 P. torridus: 8–9, Spermatheca; 10–11, parameres, lateral views; 12. Phallus expanded of P. torridus , lateral view; 13–14, conjunctival processes and aedeagus sensu stricto, dorsal view; 15–16 suprapygophoral process, dorsal view, apex of secondary process in detail (aed, aedeagus sensu stricto; ar, apical receptacle; cp2, second conjunctival process; cp3, third conjunctival process; ip, intermediate part). Dimensional lines equal 1.0 mm

(Fig. 4). Posterolateral angles truncate, inwardly depressed near parameres (Fig. 6). Ventral rim subrectilinear, from which a longitudinal suture extends until a little less than one third of the pygophore length. Parameres hook-like, with rounded head projected anterolaterally (Fig. 11).

Phallus (Fig. 12) Basal plate subrectangular and sclerotized. Phalloteca membranous, barrel-shaped, conjunctiva with two pairs of highly sclerotized processes: cp2, dorsomedial, bearing a ventral spine at the apical third; cp3, lateral, strongly curved dorsad (Fig. 7), apices parallel. Aedeagus sensu stricto oval, membranous, located between cp2 and less than half their length (Fig. 14).

Female. Genital plates (Fig. 2). Posterior margin of seventh sternite convex above inner third of valvifers 8. Laterotergites 8 subtriangular, posterior margin slightly convex, spiracles present. Laterotergites 9 subtrapezoidal, anterior and posterior margins subparallel, sutural margins straight, juxtaposed; anterolateral angles narrowly produced. Valvifers 8 juxtaposed along sutural margin; posterior margin concave. Valvifers 9 partially visible between valvifers 8 and laterotergites 9.

Gynatrium. Fecundation canal sclerite well developed, posterolateral angles slightly produced and divergent. Ring sclerites oval, three times longer than fecundation canal ( Fig. 19 ). Posteromedian pouch little developed and mostly sclerotized ( Fig. 20 ). Spermatheca (Fig. 9): apical receptacle (ar) vermiform, longer than the spermathecal duct and intermediate part (ip) together; portion of the duct distal to dilation longer than intermediate part.

Material examined. BRAZIL, Pará: Soure, 25.II.1979, Nolasco P., 1 ♂ (MCNZ); Goiás: Minaçu , 09.XIII.1996, Franceschini, A., 1 ♂ ( MCNZ 52920 ) ; São Paulo: São Bento do Sapucaí , I.1953, Buckup, L., 1 ♂ (MCNZ-2288) ; Campinas , 15.XI.1981, Martins, M., 1 ♂ ( ZUEC—HEM 3631 ) ; ibidem, 09.X.1972, Buhrnheim, P. R., 1 ♂ ( ZUEC- HEM 3635 ) ; ibidem, 15.III.1982, Ribeiro, E. L., 1 ♀ ( ZUEC- HEM 3633 ) ; Jundiaí , 02.IX.1980, Ferreira, A. R., 1 ♂ ( ZUEC—HEM 3632 ) ; Rio Grande do Sul: São Leopoldo , 15.XII.1978, Becker, O., 1 ♀ ( MCNZ 9383 ) ; same data, 1 ♂ ( MCNZ 9390 ) ; Guaíba , 26.I.1977, Lise, A., 1 ♀ ( MCNZ 15096 ) ; Tapes , 0 2.III.1985, Henning, J. E., 1 ♀ ( MCNZ 48450 ) ; Santa Cruz do Sul, 10.VIII.1971, Arno Lise, 1 ♂ ( MCNZ 9888 ) ; São Francisco de Assis , 11.X.1978, Roberto, P., 1 ♂ ( MCNZ 52859 ) ; Quaraí , 06. VI.1983, Thomé, W. T., 1 ♂ ( MCNZ 48022 ) .

Figures

FIGURES 17–20. 17, 18 P. klugii; 19–20 P. torridus: 17, 19 dorsal view;18, 20 ventral view of gynatrium: (fec, fecundation canal; fcs, fecundation canal sclerite; lt9, laterotergites 9; sth, spermatheca; pmgp, posteromedian gynatrial pouch; rs, ring sclerites). Scale bars = 1.0 mm.