Dissomphalus umbilicus Azevedo 2003, sp. nov.

Dissomphalus umbilicus sp. nov. (Figs. 53–56)

Description. — Male. Body length 3.5 mm; LFW 2.88 mm. Color: head, mesosoma and clypeus black; metasoma and mandible dark castaneous; antenna, palpi and legs castaneous; wings hyaline.

Head: mandible bidentate. Clypeus trapezoidal. First four antennal segments in a ratio of 18:7:7:8, segment XI 2.0 X as long as broad. Frons strongly coriaceous, punctures large, shallow, separated by 0.2–1.0 X their diameters. LH 1.0 X WH; WF 0.6 X WH; 1.24 X HE; OOL 1.25 X WOT; DAO 0.31 X WOT; posterior ocelli distant from the vertex crest 1.4 X DAO, frontal angle of ocellar triangle acute. Vertex badly convex, corners rounded. VOL 0.35 X HE.

Mesosoma: thorax coriaceous and punctated as frons. Pronotal disc 0.70 X length of mesoscutum. Propodeal disc 0.77 X as long as wide. Fore femur 3.3 X as long as thick.

Metasoma: tergite II with pair of elliptical sublateral depressions, shallow, larger than long, distant each other 2.0 X their width, each one with tubercle flat­topped, with pit on the top, with tuft of hairs, tubercles closer to the outer margin than the inner margin of depression. Hypopygium with median stalk 1.6 X as long as plate, posterior margin straight. Genitalia (Figs. 53–54): paramere longer than basiparamere, apex slightly arched inward, dorsal margin slightly convex, ventral margin straight below and concave apically; volsella with digitus with large basal expansion; aedeagus with ventral ramus longer than dorsal body, laminar, surface vertical, slightly convex medially outward, apex inclined and slightly convex; dorsal body with two pairs of apical lobes, outer pair laminar, surface vertical, angled downward, as a large tooth, with apical margin serrated (Fig. 55), inner pair stout, membranous and hairy; apodeme extending beyond the elliptical genital ring.

Material examined. — HOLOTYPE: male, BRAZIL, Paraná, São José dos Pinhais, Serra do Mar, Br277, km 54, 17.VIII.1987, Malaise trap, Profaupar survey (DZUP). PARATYPES: BRAZIL, Distrito Federal, 1 male, Brasília, Ecological Reserve of Roncador, forest, 19.I–2.II.1982, window trap, J. Dalmáceo (IBGE); Paraná, 1 male, Jundiaí do Sul, Monte Verde Farm, 3 males, Colombo, Embrapa, Br 476, km 20, 13 males, São José dos Pinhais, Serra do Mar, Br 277, km 54, 2 males, Ponta Grossa, Vila Velha, Reserve IAPAR, Br 376, 4 males, Telêmeco Borba, Reserva Samuel Klabin, 1.X.1984 – 5.X.1988, Malaise trap, Profaupar survey or CIIF (DZUP); São Paulo, 2 males, Serra da Bocaina, XI.1969, M. Alvarenga col. (PMAE).

Variation. — Body smaller, metasoma darker, legs lighter or darker, metasomal tergite II with depression smaller or shallower, tufts smaller or larger, apical margin of outer lobe of aedeagus slightly or strongly or not serrated (Fig. 56).

Etymology. — The specific epithet refers to tergal processes, with the common shape of tubercles, as some of the first species described by Ashmead to the genus.

Distribution. — Brazil (Distrito Federal, São Paulo, Paraná).