Dissomphalus flexuosus Alencar & Azevedo, 2006

Alencar, I. D. C. C. & Azevedo, C. O., 2006, Definition of the coronatus species-group (Hymenoptera: Bethylidae, Dissomphalus) with description of thirteen new species, Zootaxa 1330, pp. 1-26 : 14-15

Dissomphalus flexuosus Alencar & Azevedo , New Species

( Figs. 18–19 )

Diagnosis: ventral ramus of aedeagus with basal half wide and expanded laterally, apical half acutely pointed; dorsal body with base narrowing to apex, apex rounded, ventral margin straight, dorsal margin sinuous and serrate at apex; crown-process small.

Description: male, body length 3.0mm; LFW 2.1mm. Color: head and mesosoma black except pronotum slightly lighter; clypeus, mandible and metasoma castaneous; palpi and legs light castaneous except femora slightly darker; antenna light castaneous and gradually darker in distal part; wings subhyaline.

Head: mandible tridentate, uppermost tooth inconspicuous. Clypeus with trapezoidal median lobe, median carina complete and strongly developed in profile. First four antennal segments in ratio of ~15:7:5:5, segment XI 2.2x as long as wide. Frons coriaceous, punctures separated by 1.0–1.5x their diameter. LH 1.1x WH; WF 0.6x WH; WF 1.5x HE; OOL 1.4x WOT; DAO 0.3x WOT; posterior ocelli distant from crest of vertex 1.0x DAO. Vertex straight with rounded corners; VOL 1.0x HE.

Mesosoma: thoracic dorsum coriaceous and weakly punctate, setae longer than on frons. Pronotal disc 0.8x length of mesoscutum, anterior margin not carinate with small foveae. Notaulus complete. Propodeal disc 0.7x as long as wide, irregularly rugose, median carina complete; lateral surface of propodeum with striae which become finer posteriorly; declivity reticulate striate medially and areolate laterally. Fore femur 2.5x as long as wide.

Metasoma: tergum II with pair of circular and deep lateral depressions, separated by 0.8x their diameter, each depression with tuft of convergent setae directed backward, antero-lateral margin with short setae. Hypopygium with posterior margin straight.

Genitalia ( Figs. 18–19 ): paramere with apex arched mesad, inner surface of apex with short seta, dorsal margin straight with subapical small concavity, ventral margin concave. Basiparamere rounded in ventral view. Cuspis long with apex thin, digitus arched ventrally, acutely pointed, apical margin serrate, base with acute prominence directed dorsally. Aedeagus with ventral ramus shorter than dorsal body, laminar, surface horizontal and angulate ventrally, basal half wide and expanded laterally, involving dorsal body, apical half with acutely pointed; dorsal body laminar, surface vertical, base wide, apex narrow and rounded, ventral margin straight, dorsal margin sinuous and serrate at apex; crown-process small. Apodeme of aedeagus not extending beyond elliptical genital ring.

Material examined: HOLOTYPE: male, BRAZIL, Paraná, Jundiaí do Sul, Monte Verde Farm, [23°26’S 50°16’W], 13.IV.1987, Lev[antamento] Ent[omologico] PROFAUPAR, Malaise trap ( DZUP). PARATYPE: 1 male same data as holotype ( DZUP).

Variation: some specimens have the metasoma rufous castaneous.

Comments: this species has genitalia similar to those of D. coronatus in having a similar shape to the dorsal body, but D. flexuosus has the basal half of the ventral ramus expanded laterally, whereas D. coronatus has the ventral ramus of the aedeagus not expanded.

Etymology: the specific epithet comes from Latin and refers to the sinuous dorsal margin of the dorsal body of the aedeagus.

Distribution: Brazil (Paraná).

Figures

FIGURES 12 – 23. 12 – 14, Dissomphalus declinatus sp. nov. 12, metasoma, dorsal view; 13, genitalia, ventral view; 14, genitalia, dorsal view; 15 – 17, Dissomphalus decussatus sp. nov. 15, paramere, lateral view; 16, genitalia, ventral view; 17, genitalia, dorsal view; 18 – 19, Dissomphalus flexuosus 18, genitalia, ventral view; 19, genitalia, dorsal view; 20 – 21, Dissomphalus galeatus sp. nov. 20, genitalia, ventral view; 21, genitalia, dorsal view; 22 – 23, Dissomphalus hirtus sp. nov. 22, genitalia, ventral view; 23, genitalia, dorsal view. (Scale bars = 250 μm).