Dissomphalus pyata Colombo & Azevedo, sp. nov.

(Figs 11, 147–149)

Description. Male. Head and mesosoma black; metasoma dark castaneous or black. Mandible with two apical teeth; median clypeal lobe trapezoidal, median tooth weakly triangular; frons weakly coriaceous, punctate. Pronotal disc coriaceous. T2 without tergal process. Posterior hypopygeal margin straight. Genitalia: paramere small in dorsal view, apex rounded, larger than basiparamere; aedeagal ventral ramus smaller than dorsal body, apex weakly bifurcated, laminar; aedeagal dorsal body with one pair of apical lobes, inner pair with apex narrow in dorsal view, membranous; basal process larger than apical lobes, wide; apodeme extending beyond genital ring. Female unknown.

Remarks. This species is allocated in amplus species-group by having the tergal process absent. This species not is similar other of species-group. This species is mainly different because has the aedeagal ventral ramus with apex weakly bifurcated and aedeagal dorsal body with basal process larger than apical lobes.

Material examined. Types: Holotype ♂, BR[AZIL], E[spírito] S[anto]: Domingos Martins, Par [que] Est [adual] Pedra Azul, 20º25’55’’S 41º00’53’’W, 26.VIII–02.IX.2003, Arm [adilha] Malaise, C. O Azevedo & eq[uipe] col. (UFES) . Paratypes: BRAZIL, Espírito Santo: 1♂, Santa Maria de Jetibá, Fazenda Clarindo Kruguer, 20º0/4’S 40º44’53’’W, 29.XI–06.XII.2002, armadilha Malaise, Tavares, Azevedo e equipe col. (UFES) ; 4♂, Domingos Martins, Par [que] Est [adual] Pedra Azul, 20º25’55’’S 41º00’53’’W, 26.VIII–02.IX.2003, Arm [adilha] Malaise, C. O Azevedo & eq[uipe] col. (UFES) .

Etymology. The epithet pyata refers to strong in Tupi-Guarani.

Distribution. Brazil (Espírito Santo).