Dissomphalus bicerutus, Azevedo, 2003

Azevedo, C. O., 2003, Synopsis of the Neotropical Dissomphalus (Hymenoptera, Bethylidae), Zootaxa 338 (1), pp. 1-74 : 23-25

Dissomphalus bicerutus sp. nov. ( Figs. 26–28 )

Description. — Male. Body length 2.63 mm; LFW 2.1 mm. Color: body dark castaneous, metasoma lighter; antenna, clypeus, mandible and legs castaneous; palpi light castaneous; wings hyaline.

Head: mandible tridentate. Clypeus broadly projected forward, with small median tooth. First four antennal segments in a ratio of 18:9:5:6, segment XI 1.75 X as long as broad. Frons coriaceous, punctures large, shallow, separated by 0.5 –1.5 X their diameters. LH 0.94 X WH; WF 0.62 X WH; 1.4 X HE; OOL 1.23 X WOT; DAO 0.39 X WOT; posterior ocelli distant from the vertex crest 0.9 X DAO, frontal angle of ocellar triangle acute. Vertex slightly convex, corners angled. Temples paralleled. VOL 0.55 X HE.

Mesosoma: thorax coriaceous as frons. Pronotal disc slightly depressed forward, 0.73 X length of mesoscutum. Notauli present on the anterior half of mesoscutum. Parapsidal furrows ill­defined. Propodeal disc 0.7 X as long as wide. Fore femur 3.08 X as long as thick.

Metasoma: tergite II with pair of subrounded lateral depressions, distant each other 2.5 X their small diameters, nearly touching the posterior margin of tergite, each depression with anterior elliptical tuft of hairs, the most lateral one directed outward and distinctly longer than the others. Hypopygium with stalk 1.7 X longer than plate, posterior margin strongly concave. Genitalia ( Figs. 26–27 ): paramere with apical half arched inward and very thin, apex acute, base very wide, dorsal margin concave above; aedeagus with ventral ramus slightly shorter than dorsal body, laminar, basal half with surface horizontal, very wide, inner margin straight and parallel, outer margin convex, apical half with surface vertical, abruptly thin, with apex sharpened; dorsal body with two pairs of apical lobes, outer pair laminar, surface vertical, base wide in both lateral and dorsal views, and narrowing to the acute apex, ventral margin serrated apically; apodeme extending beyond the elliptical genital ring.

Material examined. — HOLOTYPE: male, BRAZIL, Paraná, São José dos Pinhais, Serra do Mar, Br 277, km 54, 23.XI.1987, Malaise trap, Profaupar col. ( DZUP) . PARATYPES: BRAZIL, Rio de Janeiro, 2 males, Silva Jardim , VIII.1974, F. M. Oliveira col. ( CNCI) ; São Paulo, 3 males, São José do Barreiro, Serra da Bocaina , 13.I–IX.1969, M. Alvarenga & G. Porter col. ( PMAE, MCZH) ; Paraná, 4 males, Telêmaco Borba, Reserve Samuel Klabin , 6 males, São José dos Pinhais, Serra do Mar , Br 277 km 54 , 16 males, Ponta Grossa , Vila Velha, Reserva Iapar, BR 376 , 7 males, Colombo, Embrapa, Br 476, Km 20, 11.VIII.1986 – 23.V.1988, all Malaise trap, Profaupar col. ( DZUP) .

Variation. — Head and mesosoma lighter, punctures of frons larger and more spaced; vertex with corners not so angulate, ventral margin of outer lobe of aedeagus not serrated ( Fig. 28 ).

Etymology. — The specific epithet refers to the shape of apex of ventral ramus of aedeagus.

Distribution. — Brazil (Rio de Janeiro, São Paulo, Paraná).

Figures

FIGURES 26–40. 26–28, Dissomphalus bicerutus sp. nov. 26, genitalia, ventral view; 27, genitalia, dorsal view; 28, outer lobe of aedeagus, lateral view; 29–32, Dissomphalus tuberculatus 29, metasoma, latero­dorsal view; 30, genitalia, ventral view; 31, genitalia, dorsal view; 32, paramere and basiparamere, lateral view; 33–36, Dissomphalus cervoides sp. nov. 33, metasoma, latero­dorsal view; 34, genitalia, ventral view; 35, genitalia, dorsal view; 36, outer lobe of aedeagus, lateral view; 37–40, Dissomphalus conicus sp. nov. 37, tubercle, lateral view; 38, genitalia, ventral view; 39, genitalia, dorsal view; 40, aedeagus, lateral view. (Scale bars = 0.5 mm, except for figure 37 = 0.1 mm).