Dissomphalus truncatus, Azevedo, 2003

Azevedo, C. O., 2003, Synopsis of the Neotropical Dissomphalus (Hymenoptera, Bethylidae), Zootaxa 338 (1), pp. 1-74 : 37-39

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https://doi.org/ 10.11646/zootaxa.338.1.1

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Dissomphalus truncatus

sp. nov.

Dissomphalus truncatus sp. nov. ( Figs. 50–52 View FIGURES 50–59 )

Description. — Male. Body length 5.0 mm; LFW 3.45 mm. Color: head, mesosoma and clypeus black; metasoma, mandible and antenna dark castaneous; legs and palpi castaneous; wings subhyaline.

Head: mandible bidentate. Clypeus trapezoidal. First four antennal segments in a ratio of 19:7:9:9, segment XI 2.3 X as long as broad. Frons strongly coriaceous, punctures large, shallow, separated by 0.1–1.0 X their diameters. LH 1.0 X WH; WF 0.6 X WH; 1.38 X HE; OOL 1.387 X WOT; DAO 0.33 X WOT; posterior ocelli distant from the vertex crest 1.83 X DAO, frontal angle of ocellar triangle acute. Vertex badly convex, corners rounded. VOL 0.47 X HE.

Mesosoma: thorax coriaceous and punctated as frons. Pronotal disc 0.57 X length of mesoscutum. Propodeal disc 0.66 X as long as wide. Fore femur 3.4 X as long as thick.

Metasoma: tergite II with pair of elliptical sublateral depressions, larger than long, distant each other 1.0 X their width, each one with tubercle flat­topped, with pit on the top, with tuft of hairs, tubercles closer to the inner margin than the outer margin of depression. Hypopygium with median stalk 1.75 X as long as plate, posterior margin straight. Genitalia ( Figs. 50–51 View FIGURES 50–59 ): paramere longer than basiparamere, apex slightly arched inward, dorsal margin slightly convex, ventral margin straight below and concave apically; volsella with cuspis with apex dilated and truncate; aedeagus with ventral ramus slightly shorter than dorsal body, laminar, surface vertical, slightly convex medially outward, apex inclined and slightly concave; dorsal body with two pairs of apical lobes ( Fig. 52 View FIGURES 50–59 ), outer pair laminar, surface vertical, dilated and rounded in lateral view, ventral margin serrated, with long median tooth, inner pair stout, membranous and hairy, outer surface with some teeth and the ventral one larger; apodeme extending beyond the elliptical genital ring.

Material examined. — HOLOTYPE: 1 male, BRAZIL, Paraná, São José dos Pinhais, Serra do Mar , Br277, km 54, 9.II.1987, Malaise trap, Profaupar survey ( DZUP) . PARATYPES: BRAZIL, Paraná, 26 males, São José dos Pinhais, Serra do Mar , Br 277 km 54 , 1 male, Colombo, Embrapa, Br 476. Km 20, 1.X.1984 – 23.XI.1987, all Malaise trap, Profaupar survey or CIIF ( DZUP) .

Variation. — Legs darker, depression of the tergal processes smaller or shallower, tufts smaller or larger, cuspis with apex more rounded, apical margin of ventral ramus of aedeagus straight or slightly convex, outer lobe of aedeagus with ventral margin only apically and median tooth bifurcated;

Etymology. — The specific epithet refers to the apex of cuspis truncate.

Distribution. — Brazil (Paraná).


Universidade Federal do Parana, Colecao de Entomologia Pe. Jesus Santiago Moure