Tribonium neospectrum Lopes, 1978

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 : 598

Tribonium neospectrum Lopes, 1978

( Figs. 21–29 , 30, 36 )

Examined material. Argentina: Misiones Province, 1♂, Oberá, (-27,484.697; -55,123.311) 01/IX/1987 (Col. Fundación Félix Azara).

Measurements (mm). Male. TL: 19.4. BL: 17.4. BW: 8.9. PL: 3.6. PW: 6.7. TeL: 16.1. TeW: 5.6. IO: 1.4. IA: 1.7. IOc: 1.3.

Redescription. Size small for the genus, even smaller than the holotype but with similar characteristics.

Thorax. Prothoracic femora D0 type, with ventral posterior margins unarmed and genicular spine absent. The same spine distribution observed in the prothoracic femora is also observed in meso- and metathoracic legs. Tibial formula: Males [5*2*2–1] [9*3*5–4] [14–12*3–2*7–6]. Tarsi with large arolia.

Male genitalia. L2’with an elongated and remarkably curved apophysis ( Figs. 27–28 , 30 ); cranial margin of via completely arched, its dorsal process almost straight and the other side with the blunt cranial projection only. The acute, caudal projection only slightly discernible ( Fig. 30 d). L3’ subconical base gently narrowing until turning into a well-defined neck. Internal margin of the apical hook almost straight ( Figs. 26 , 36 ). The subapical incision is broad compared with those of T. rothi and T. conspersum . Latero-cranial apex of R3’wide and truncated ( Fig. 29 b). R2’ less curved ( Fig. 29 a) compared with T. conspersum . The tooth of cpR1T’ is scarcely insinuated.

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).