Dissomphalus refertus Alencar & Azevedo, 2008

Alencar, I. D. C. C. & Azevedo, C. O., 2008, A new species-group of Dissomphalus (Hymenoptera: Bethylidae), with description of thirteen new species, Zootaxa 1851 (1), pp. 1-28 : 22-24

Dissomphalus refertus Alencar & Azevedo , sp. nov.

( Figs. 78–83 )

Dissomphalus microstictus Evans, 1969 in partim.

Diagnosis: male. This species is promptly recognized by the unique combination of characters: the paramere evenly wide in dorsal view; the filament of ventral ramus inserted subapically, nearly as long as ramus, sinuous, apex dilated; the dorsal body with basal bar triangular; the connector with lateral expansion bifurcate, mid part dilated basally with ventral hook apicad; and the basal plate simple.

Description: male, body length 4.25 mm; LFW 3.35 mm. Color: head and mesosoma black, pronotum with narrow posterior line castaneous; clypeus and metasoma dark castaneous; mandible, palpi and legs yellowish; antenna light castaneous and gradually darker distally; wings subhyaline.

Head: mandible tridentate, uppermost tooth inconspicuous. Clypeus with trapezoidal median lobe, median carina complete, tall in lateral view. Relative length of first four antennal segments ~14:5:4:5 segment XI 1.6x as long as wide. Frons strongly coriaceous, punctures large and shallow, separated by 0.5–2.0x their diameter. LH 1.0x WH; WF 0.6x WH; WF 1.3x HE; OOL 0.6x WOT; DAO 0.3x WOT; posterior ocellus distant from crest of vertex 1.3x DAO. Vertex somewhat concave; VOL 0.6x HE.

Mesosoma: thoracic dorsum weakly coriaceous, punctures smaller and sparser than those of frons. Pronotal disc 0.6x length of mesoscutum. Notaulus complete. Propodeal disc 0.6x as long as wide, irregularly rugose, median carina incomplete, posterior part elevate, polished and shinny; lateral surface of propodeum weakly coriaceous; declivity imbricate, median carina complete. Fore femur 3.8x as long as wide.

Metasoma ( Fig. 78 ): tergite II with pair of circular, large and shallow lateral depressions, separated by 1.5x their diameter, each depression with pit with raised rims and with one short seta directed backward, lateral margin with few setae. Hypopygium missing.

Genitalia ( Figs. 79–83 ): paramere evenly wide in dorsal view; apex rounded and arched mesad; ventral margin strongly concave apically, apical corner large and rounded, somewhat concave basally; dorsal margin straight with subapical acute concavity ( Figs. 79, 80, 83 ). Dorsal margin of basiparamere somewhat inclined. Cuspis long and arched, apex rounded, digitus with apex pointed and smooth in upper margin. Aedeagus with ventral ramus shorter than dorsal body, laminar, surface horizontal, inner margin straight in ventral view, ventrad except base flat with narrow fold, outer margin convex, basally with ventral fold, filament inserted subapically, nearly as long as ramus, sinuous, apex dilated, narrow, thin and arched dorsad ( Fig. 79 ); dorsal body with three pairs of apical lobes, outer pair laminar longer than paramere, surface vertical, wide, apex convergent, dorsal margin convex in lateral view ( Fig. 82 ) and concave in dorsal view ( Fig. 80 ), ventral margin with subapical concavity and projection straight and serrate ( Figs. 81, 82 ), dorsal inner pair small, membranous and hairy, ventral inner pair longer than dorsal one, membranous and hairy; basal bar triangular, upper margin concave, lower margin almost touching basal plate; connector with apex of lateral expansion bifurcated, mid part dilated basally with ventral hook apicad; basal plate simple ( Fig. 80 ). Apodeme of aedeagus not extending beyond elliptical genital ring.

Material examined: HOLOTYPE: male, BRAZIL, Rio de Janeiro, Nova Iguaçu, Reserva Biológica de Tinguá , 22º34’S 43º26’W, 05–08.iii.2002, armadilha Malaise, S. T. P. Amarante e eq. col. ( MZSP) (previously identified as D. microstictus in Redighieri & Azevedo 2006).

Comments: this species is similar to D. microstictus by having the connector with apex of the lateral expansion bifurcated. However D. refertus has the connector much larger than in D. microstictus .

Redighieri & Azevedo (2006) wrote that specimens from Rio de Janeiro present mandible bi- or tridentate, but this has not been confirmed since there is only one exemplar from that state.

Etymology: the specific Latin epithet refers to the dorsal body, which possesses two pairs of inner lobes.

Distribution: Brazil (SE).

Figures

FIGURES 78–89. 78–83, Dissomphalus refertus. 78, tergal process, dorsal view; 79, genitalia, ventral view; 80, genitalia, dorsal view; 81, outer lobe, ventral view; 82, apex of outer lobe, lateral view; 83, paramere, lateral view; 84–88 Dissomphalus signatus. 84, genitalia, ventral view; 85, genitalia, dorsal view; 86, outer lobe, ventral view; 87, apex of dorsal body, lateral view; 88, paramere, lateral view; 89, paramere, basal inner view. (Scale bars = 250 µm).