Pseudisobrachium formosum, Waichert, C. & Azevedo, C. O., 2004

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 : 10-12

Pseudisobrachium formosum sp. nov. ( Figs. 25–28 )

Description.— Male. Body length 2.12 mm; LFW 1.60 mm. Color: head black; mesosoma and metasoma dark castaneous, except the pronotum light castaneous; mandible, scape and pedicel light castaneous, flagellum dark castaneous; legs light castaneous; wings hyaline, veins light castaneous. Pubescence slightly evident.

Head ( Fig. 25 ): mandible with 5 teeth ( Fig. 26 ). Clypeus with trapezoidal median lobe, apical margin emarginate and angled. First four antennal segments in a ratio of 22:6:19:14; segment III 3.43 X longer than thick, segment XI 2.5 X; flagellar pubescence subappressed, with some erect setae. Eyes bulging. Frons shining, coriaceous, punctures extremely small, shallow and sparse, almost inconspicuous. WH 0.81 X LH, WF 0.62 X WH, WF 1.31 X HE; ocellar triangle compact, with acute frontal angle; OOL 1.70 X WOT. Vertex narrowly straight. VOL 1.1 X HE. Temples strongly divergent anteriorly. Occipital carina totally visible in dorsal view.

Mesosoma: pronotum and mesonotum coriaceous, pronotal disc elongate anteriorly, punctured as frons; notauli absent, parapsidal furrow only on the anterior half; scutellar disc coriaceous, punctures inconspicuous. Propodeal disc 1.43 X as long as wide, 1.74 X as long as high; propodeum areolate, declivity and lateral sides weakly areolate, disc without median, lateral and posterior carinae, lateral carina irregular. Mesopleuron coriaceous with a large coriaceous callus, punctures deep and irregular. Fore wing with discoidal vein spectral, weakly pigmented, interstitial with median vein.

Genitalia ( Figs. 27–28 ): paramere with ventral arm 2.5 X wider than dorsal arm, ventral arm wider medially, dorsal arm uniformly narrow and arched over the ventral arm laterally; vannus with 5 grooves; aedeagus nearly evenly narrow, its apex lower than the apex of paramere, with two hooks overturned inward.

Material examined.— HOLOTYPE: male, BRAZIL, Espírito Santo, Santa Teresa, Estação Biológica de Santa Lúcia, 23.VII.2001, sweeping, C.O. Azevedo & R. Kawada col. ( UFES). PARATYPES: BRAZIL, Espírito Santo, 0 5 males, Santa Teresa, Estação Biológica de Santa Lúcia, 30.I–10.XII.2001, sweeping, C.O. Azevedo & R. Kawada col. ( UFES); 0 1 male, Cariacica, Reserva Biológica de Duas Bocas, 17.XII.1996, sweeping, C.O. Azevedo & H. S. Sá col. ( UFES).

Discussion.— This species is similar to P. turbinatum Evans, 1961 , from Jamaica, in having the head strongly convergent behind the dorsal edges of eyes, apical margin of median lobe of clypeus concave and eyes bulging. In P. f o r m o s u m the occipital carina is visible in dorsal view, the ocelli are small, mandible has five teeth and the aedeagus is uniform wide, whereas in P.turbinatum the occipital carina is not visible in dorsal view, the ocelli are large and distant from each other, the mandible has the three upper teeth large and almost fused, and aedeagus has a dilated central portion.

Etymology.— The specific epithet refers to the beautiful shape of specimens.

Distribution.— Brazil (Espírito Santo).

Figures

FIGURES 25 – 37. 25 – 28, Pseudisobrachium formosum sp. nov. 25, head, dorsal view; 26, mandible, frontal view; 27, genitalia, ventral view; 28, paramere, lateral view; 29 – 32, Pseudisobrachium cuspidatum sp. nov. 29, head, dorsal view; 30, mandible, frontal view; 31, genitalia, ventral view; 32, dorsal arm of paramere, lateral view; 33 – 37, Pseudisobrachium rotundum sp. nov. 33, head, dorsal view; 34, mandible, frontal view; 35, genitalia, ventral view; 36, ventral arm of paramere, lateral view; 37, dorsal arm of paramere, lateral view. (Scale bars = 250 μm for head and mandible, = 130 μm for genitalia).