Dissomphalus mandibulatus, Azevedo, 2003

Azevedo, C. O., 2003, Synopsis of the Neotropical Dissomphalus (Hymenoptera, Bethylidae), Zootaxa 338 (1), pp. 1-74: 19-20

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

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scientific name

Dissomphalus mandibulatus

sp. nov.

Dissomphalus mandibulatus   sp. nov. ( Figs. 16–19 View FIGURES 11–25 )

Description. — Male. Body length 1.65 mm; LFW 1.38 mm. Color: body castaneous, head darker; legs light castaneous; wings subhyaline.

Head ( Fig. 16 View FIGURES 11–25 ): mandible very long, overlapping more than the apical half of opposite mandible, slender, wider medially, tridentate, the two upper teeth small and rounded, the two lower teeth very large and sharpened ( Fig. 17 View FIGURES 11–25 ). Clypeus with median lobe angulate. First four antennal segments in a ratio of 11:7:5:5, segment XI 1.62 X as long as broad. Frons weakly coriaceous, punctures shallow, inconspicuous. Head with sides parallel, 1.12 X as wide as long; WF 0.73 X WH; WF 1.97 X HE; OOL 1.97 X WOT; DAO 0.37 X WOT; posterior ocelli distant from the vertex crest 1.86 X DAO. Vertex hardly convex, corners rounded, postgenae larger than the short genae. VOL 0.71 X HE.

Mesosoma ( Fig. 16 View FIGURES 11–25 ): thorax with same texture and punctures as on frons. Pronotal disc 0.77 X length of mesoscutum, depressed forward. Scutellum short, scutellar groove not dilated in the ends. Mesoaxillar pit deep. Propodeal disc 0.67 X as long as wide, median carina incomplete anterior and posteriorly, with irregular anterior striae; declivity without median carina. Metasternum wider than long. Fore femur 3.0 X as long as thick.

Metasoma: tergite II without tergal processes. Hypopygium with posterior margin concave. Genitalia ( Figs. 18–19 View FIGURES 11–25 ): paramere with apex thin, rounded and arched inward, base wide, dorsal margin straight below, concave on the apical half, ventral margin evenly concave; aedeagus with ventral ramus shorter than dorsal body, laminar, horizontal, inner margin straight, outer convex, apical fourth narrow, apex rounded; dorsal body with two pairs of apical lobes, the dorsal pair ill­defined, short, with upper margin high in lateral view, the ventral pair stout, membranous, surface hairy; apodeme extending the elliptical genital ring.

Material examined. — HOLOTYPE: male, BRAZIL, Amazonas , Estirão do Equador, IX.1979, Alvarenga col. ( CNCI)   . PARATYPES: BRAZIL, 1 male, same data as holotype, except X.1979 ( PMAE)   ; 1 male Acre, Parq. Nac. da Serra do Divisor , norte, 12– 13.XI.1996, Malaise trap, E. F. Morato col. ( UFES)   ; 1 male PERU, Huanuco, Tingo Maria , 27.I.1984, L. Huggert col. ( PMAE)   .

Variation. — Specimens from Peru with median carina of propodeal disc complete anteriorly, notauli absent in the posterior mesoscutum.

Comments. — This species is peculiar character as mandible very long.

Etymology. — The specific epithet refers to the length of mandible.

Distribution. — Brazil (Amazonas, Acre), Peru.


Canadian National Collection Insects


Universidade Federal do Espirito Santo