Pseudisobrachium opimum

Waichert, C. & Azevedo, C. O., 2004, Fourteen new species of Pseudisobrachium (Hymenoptera, Bethylidae) from Atlantic rain forest of Espírito Santo, Brazil., Zootaxa 661, pp. 1-22: 18-20

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Pseudisobrachium opimum

sp. nov.

Pseudisobrachium opimum  HNS  sp. nov. (Figs. 52-57)

Description.-Male. Body length 4.64 mm; LFW 3.36 mm. Color: head dark castaneous, almost black; pronotum and mesothorax light castaneous, propodeum dark castaneous; metasoma light castaneous; mandible, clypeus and antenna light castaneous; legs light castaneous; wings subhyaline, veins light castaneous. Pubescence conspicuous.

Head (Fig. 52): mandible with 5 teeth (Fig. 53). Clypeus with trapezoidal median lobe, apical margin truncate, median carina high. First four antennal segments in a ratio of 21:4:16:14; segment III 2.73 X longer than thick, segment XI 2.62 X; flagellar pubescence relatively abundant, suberect, with erect setae. Frons coriaceous, with punctures small, shallow. WH 0.92 X LH, WF 0.68 X WH, WF 1.49 X HE; DAO 0.13 X WF; OOL 1.52 X WOT, frontal angle of ocellar triangle acute; VOL 0.71 X HE. Vertex weakly convex. Temples divergent anteriorly.

Mesosoma: pronotum and mesonotum coriaceous, punctured as on frons; notauli shallow, almost complete; parapsidal furrows almost complete; scutellar disc coriaceous. Propodeal disc 1.08 X as long as wide, 1.85 X as long as high, basal triangle striate, median carina long and incomplete, lateral carinae present, the posterior absent, declivity striate, lateral portion of propodeum weakly coriaceous. Mesopleuron strongly punctured with callus coriaceous and slightly evident, deep punctures on upper area. Fore wing with discoidal vein spectral, less pigmented, not interstitial with the median vein.

Genitalia (Figs. 54-57): paramere with ventral arm approximately 2.0 X wider of dorsal arm; vannus with 5 inclined grooves; aedeagus elliptical, apex emarginated, base narrow, about 2.5 X narrower than central portion, apex lower than the apex of paramere.

Material examined.- HOLOTYPE: male, BRAZIL, Espírito Santo, Santa Teresa, Estacao Biologica de Santa Lucia , 31. V.2001, sweeping, C.O. Azevedo & R. Kawada col. ( UFES).  PARATYPES: BRAZIL, Espírito Santo, 03 males, Santa Teresa, Estacao Biologica de Santa Lucia , 28.III-26.XI.2001, sweeping, C.O. Azevedo & R. Kawada col. ( UFES)  .

Variation.-Body lighter or darker.

Discussion.-This species is similar to P. dalmati Evans  HNS  , 1961, from Guatemala, but here the frons and the pronotum are coriaceous and the punctures are small and shallow, whereas in P. dalmati  HNS  the frons and the pronotum are not coriaceous and the punctures are strong. The species is also similar to P. jamaicense Evans  HNS  , 1969, from Jamaica, but here the head is narrower, the ventral arm of paramere more straight and dorsal arm wider, aedeagus shorter.

Etymology.-The specific epithet refers to the wide aedeagus. Distribution.-Brazil ( Espírito Santo).


Brazil, Universidade Federal do Espirito Santo, Departamento de Biologia, Colecao Entomologica