Schistopeltis lizeri Rehn 1928

Valverde, Alejandra Del Carmen, Crespo, Francisco Antonio & Iglesias, Mónica Sandra, 2012, Morphologic study of male genitalia and female description of Schistopeltis lizeri Rehn (Blaberidae, Zetoborinae, Triboniini), Zootaxa 3326, pp. 62-66 : 63-65

Schistopeltis lizeri Rehn 1928

( Figs. 1–10 , 15–18 ).

The genital sclerites of male. Supra-anal plate transverse with the distal margin bilobated. In the genital chamber the right-side paraproct hook-shaped with its apex directed apically ( Figs. 2–3 ). Subgenital plate slightly asymmetrical with simple styles ( Fig. 4 ).

Left phallomeres, subdivided in L1 and L2. The first genital sclerite L1 ( Fig. 15 ) very well developed and various areas darkly sclerotized. L1 presenting a cleft with a sigmoid shape and a narrow aperture.

L2 placed medially with two intimately articulated articles. The ventromedial article L2vm ( Fig. 16 ) with a well developed posterior apophysis, which extends dorsally (laterally in the photograph). Its posterior apophysis with a wide base that tappers distally. The dorsal article L2d ( Fig. 16 ) with curved dorsal process under L2vm apophysis.

The right phallomere R2 a hooked sclerite retracted in a soft cuticular tube. The apical third ( Figs. 17–18 ) sclerotized, with a globulous subconic base and a hooked apex with a narrow subapical incision that forms a free blade shaped lamina with a rounded apex.

External morphology of the female ( Fig. 6 ). Size similar to male ( Table 1). Female pronotal fissures ( Fig. 5 ) narrower than those of male. Front leg type D, with ventral anterior and posterior margins unarmed and genicular spine absent. Tibial formula with the same distribution as those in the male and nymph [5–6*2*1] [10*2*4] [13*2*8]. The cerci tapering distally with color similar to male. Supranal plate darker than male. Subgenital plate with different shape with a clear subapical area ( Fig. 7 ).

Mature nymph ( Fig. 9 ). Body length 23 mm; pronotum length 4.45 mm; pronotum width 9 mm; interocular distance 2 mm; interantennal distance 2 mm; interocelar distance 1.55 mm.

The nymph with a pronotum not bifissate, but the fissures feeble, insinuated on the pronotal anterior border ( Fig. 8 ). The mature nymph is likely to develop into a female, a deduction based on the absence of the styli ( Fig. 10 ) and the measurements similar to those of the female. The pharate adult can be observed by transparent cuticle; its pronotal lateral wings and fissures are evident.

Species S. lizeri S. peculiaris S. microschistos Country Argentina Bolivia Brasil Colombia

Sex M F M M M F Body length 20.80–25.90 23.00 20.00 26.80 25.00 27.00–28.50 Pronotum length 3.80–4.20 4.60 4.90 6.30 5.30–5.50 5.80 Pronotum width 8.00–9.35 8.90 8.60 11.40 10.80–11.00 12.00–12.50 Tegmen length 19.30–20.40 19.90 19.40 23.00 23.5–24.00 27.00 Tegmen width 5.30–6.00 6.00 6.90 8.20 8.00 9.00 Inter ocular distance 1.70–1.85 2.00 1.58 1.51 1.50 1.70–1.80 Inter antenal distance 2.00–2.15 2.50 2.16 2.15 2.00 2.10–2.20 Inter ocelar distance 1.35–1.45 1.50 1.34 1.45

Figures

FIGURES 1 – 10. Schistopeltis lizeri. Male. 1. Habitus, dorsal view. 2. Supranal plate, paraprocts and cerci, dorsal view (paraprocts are seen by transparency). 3. Scheme of paraprocts. 4. Subgenital plate, ventral view. Female. 5. Pronotum, dorsal view. 6. Habitus, dorsal view. 7. Subgenital plate, ventral view. Mature nymph. 8. Pronotum, dorsal view, arrows indicate the insinuated fissures. 9. Habitus, dorsal view. 10. Subgenital plate, ventral view. Scales: 1 mm. lp: left paraproct. rp: right paraproct.

FIGURES 11 – 22. S. microschistos (11 – 14, photo credit. Vélez & Gutiérrez, 2010). 11. Left phallomere L 1. 12. Left phallomere: L 2 vm and L 2 d. 13. Right phallomere R 2. 14. Scheme, apex R 2. S. lizeri (15 – 18) 15. Left phallomere L 1. 16. Left phallomere: L 2 vm and L 2 d. 17. Right phallomere R 2. 18. Scheme, apex R 2. S. peculiaris (19 – 22). 19. Left phallomere L 1. 20. Left phallomere: L 2 vm and L 2 d. 21. Right phallomere R 2. 22. Scheme, apex R 2. Scale: 1 mm. ap: apophysis; cl: cleft; dp: dorsal process; L 1: left phallomere; L 2 d: left phallomere dorsal; L 2 vm: left phallomere ventromedial; R 2: right phallomere; si: subapical incisure.