Tribonium

Crespo, Francisco Antonio, Valverde, Alejandra Del Carmen & Iglesias, Mónica Sandra, 2015, A new species of Tribonium Saussure, 1862 from the Province of Misiones, Argentina (Blattaria, Blaberidae, Zetoborinae), Zootaxa 3936 (4), pp. 593-599 : 594

Key to species of Tribonium known from Argentina

1 L2’ with apophysis (ap) elongated and notoriously curved ( Fig. 28 )............................................. 2

- L2’ with apophysis (ap) straight......................................................................... 3

2 L3’: internal margin of apical hook almost straight ( Fig. 26 ), subapical notch (45 in Fig. 36 ) is broad..................................................................................................... Tribonium neospectrum

- L3’: internal margin of apical hook convex; subapical notch narrow ( Fig. 31 in Lopes, 1978)........ Tribonium spectrum

3 Caudal process of L2’ (via) ( Figs. 8–9 , 31 ) with cranial and caudal swellings (sw) ............... Tribonium rothi sp. n.

- Caudal process of L2’ (via) without swellings ( Figs. 19 , 32 )................................................... 4

4 L3’ with a wide, sub-conical base that abruptly turns into a narrow neck (nk), its width is approximately 1/3 of its base’s diam- eter ( Figs. 17 , 35 ). The internal margin of the apical hook is smoothly convex, and its external curvature almost regular....................................................................................... Tribonium conspersum

- L3’ with a wide sub-conical base that abruptly turns into a broad neck (nk), its width is larger than half of the base’s diameter. The internal margin of the apical hook is scarcely convex, and its external curvature irregular ( Fig. 36 in Lopes 1978)........................................................................................ Tribonium guttulosum

Figures

FIGURES 1 – 29. Figs. 1 – 10, Tribonium rothi sp. n., Holotype ♂: 1) Habitus, dorsal view; 2) Pronotum, dorsal view; 3) Left tegmina, dorsal view; 4) Anal plate, ventral view; 5) Paraprocts, ventral view; 6) Subgenital plate, ventral view; 7) L 3 ’, dorsal view; 8) L 2 ’ + via, dorsal view; 9) L 2 ’ + via, detail; 10) Right phallomere: a) dorsal view, b) ventral view. Figs 11 – 20, Tribonium conspersum, ♂: 11) Habitus, dorsal view; 12) Pronotum, dorsal view; 13) Left tegmina, dorsal view; 14) Anal plate, dorsal view; 15) Paraprocts, ventral view; 16) Subgenital plate, ventral view; 17) L 3 ’, dorsal view; 18) L 2 ’ + via, dorsal view; 19) L 2 ’ + via, detail; 20) Right phallomere: a) dorsal view, b) ventral view. Figs 21 – 29, Tribonium neospectrum, ♂: 21) Habitus, dorsal view; 22) Pronotum, dorsal view; 23) Left tegmina, dorsal view; 24) Anal plate, dorsal view; 25) Subgenital plate, ventral view; 26) L 3 ’, dorsal view; 27) L 2 ’ + via, dorsal view. 28) L 2 ’ + via, detail; 29) Right phallomere: a) dorsal view, b) ventral view. Scales: Habitus, pronotum, and tegmina = 5 mm; all the other figures = 1 mm.

FIGURES 30 – 36. Figs. 30 – 33, Schematic rotation of L 2 ’ + via (from ventral view to dorsal view): 30) Tribonium neospectrum; 31) Tribonium rothi sp. n.; 32) Tribonium conspersum. 33) Schematic drawing of the phallomeres in their natural position (dorsal view). Figs. 34 – 36, Scheme of L 3 ’: 34) Tribonium rothi sp. n.; 35) Tribonium conspersum; 36) Tribonium neospectrum (dorsal view).