Dissomphalus sinatus 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 : 22-23

Dissomphalus sinatus Alencar & Azevedo , New Species

( Figs. 31–32 )

Diagnosis: cuspis somewhat dilated; aedeagus with ventral ramus with basal half wide and short, inner margin sinuous, outer margin concave, apical half inclined, apex slightly rounded and expanded; dorsal body wide and long, outer margin of apex convex, inclined and rounded; crown-process long, located at lower part of aedeagus.

Description: male, body length 3.3mm; LFW 2.6mm. Color: head, clypeus and mesosoma black except the pronotum slightly lighter; metasoma dark castaneous; mandible, palpi and legs light castaneous except femora darker, antenna light castaneous and gradually darker in distal part; wings subhyaline.

Head: mandible tridentate. Clypeus with trapezoidal median lobe, median carina complete. First four antennal segments in ratio of ~20:10:7:8 segment XI 1.6x as long as wide. Frons coriaceous, punctures small and shallow, separated by 1.5–2.0x their diameter. Compound eyes with short hair, almost inconspicuous. LH 1.0x WH; WF 0.6x WH; WF 1.2x HE; OOL 1.2x WOT; DAO 0.3x WOT; posterior ocelli distant from crest of vertex 1.4x DAO. Vertex convex with rounded corners; VOL 1.0x HE.

Mesosoma: thoracic dorsum weakly coriaceous, punctures smaller and sparser than those of frons. Pronotal disc 0.4x length of mesoscutum, anterior margin carinate. Notaulus incomplete. Propodeal disc 0.5x as long as wide, irregularly rugose, median carina incomplete, corners of posterior part polished and shiny; lateral surface of propodeum with striae which become finer posteriorly; declivity areolate. Fore femur 2.7x as long as wide.

Metasoma: tergum II with pair of circular, large and deep lateral depressions, separated by 0.6x their diameter, each depression with tuft of convergent setae directed backward, antero-lateral margin with long setae. Hypopygium with posterior margin straight.

Genitalia ( Figs. 33–34 ): paramere with apex arched mesad, inner surface of apex with distinct long seta, ventral margin concave and dorsal margin somewhat convex with subapical concavity. Basiparamere rounded in ventral view. Cuspis long, arched and somewhat dilated, digitus arched ventrally, base with a thin protuberance directed dorsally. Aedeagus with ventral ramus shorter than dorsal body, laminar, surface horizontal, basal half wide and short, inner margin sinuous, outer margin concave, apical half inclined, apex slightly rounded and expanded; dorsal body wide and long, laminar, surface vertical, outer margin of apex convex, inclined and rounded; crown-process long, located at lower part of aedeagus. Apodeme of aedeagus not extending beyond elliptical genital ring.

Material examined: HOLOTYPE: male, COSTA RICA, Heredia, La Selva Biol[ogical] Sta[tion], [10º25’48”N 84º1’12”W], 11–17.VI.1986, G. Bohart and W. Hanson col. ( EMUS). PARATYPE: 1 male, PERU, Junin, Satipo, [11°16’S 74°41’W], 21–24.I.1984, L. Huggert col. ( PMAE), 1 male, PERU, Huãnuco, Cord[illera] Azul, 39km NE Tingo Maria, 1700m, montane rain forest, [9ºS 75º34’60”W], 11–14.I.1983, trap site 672, A. Newton & M. Thayer col. ( CNCI).

Variation: some specimens have the metasoma and mesosoma lighter.

Comments: this species is similar to D. auritus in having the long dorsal body of aedeagus and crown-process long. However, D. auritus has the apical half of the ventral ramus somewhat arched dorsally, whereas D. sinatus has the apex of the apical half of the ventral ramus somewhat rounded and expanded.

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

Distribution: Costa Rica, Peru.

Figures

FIGURES 24 – 34. 24 – 27, Dissomphalus pronus sp. nov. 24, genitalia, ventral view; 25, genitalia, dorsal view; 26, apex of dorsal body, ventral view; 27, apex of dorsal body, lateral view; 28 – 30, Dissomphalus ramosus 28, genitalia, ventral view; 29, genitalia, dorsal view; 30, apex of dorsal body, ventral view; 31 – 32, Dissomphalus sinatus sp. nov. 31, genitalia, ventral view; 32, genitalia, dorsal view; 33 – 34, Dissomphalus uber sp. nov. 33, genitalia, ventral view; 34, genitalia, dorsal view. (Scale bars = 250 μm).