Dissomphalus pilus 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 : 21-22

publication ID

https://doi.org/ 10.11646/zootaxa.1851.1.1



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scientific name

Dissomphalus pilus Alencar & Azevedo

sp. nov.

Dissomphalus pilus Alencar & Azevedo , sp. nov.

( Figs. 71–77 View FIGURES 66–77 )

Diagnosis: male. This species is easily recognized by having the paramere very wide at the middle, n dorsal view. The filament of ventral ramus inserted subapically, nearly as long as ramus, sinuous; the dorsal body with outer lobe irregular at apex in lateral view; the basal bar triangular, the connector with lateral expansion concave, mid part darker and rounded; and the basal plate simple are also a combination of characters useful to identify this species.

Description: male, body length 4.35 mm; LFW 3.10 mm. Color: head and mesosoma black, except pronotum somewhat castaneous; clypeus and metasoma dark castaneous; mandible castaneous; palpi and legs yellowish except hind coxa and hind femur dark castaneous; antenna light castaneous and gradually darker distally; wings subhyaline.

Head: mandible bidentate. Clypeus with trapezoidal median lobe, median carina complete, tall in lateral view. Relative length of first four antennal segments ~6:3:3:4 segment XI 1.6x as long as wide. Frons strongly coriaceous, punctures small and shallow, separated by 1.0–2.0x their diameter. LH 0.9x WH; WF 0.5x WH; WF 1.3x HE; OOL 0.6x WOT; DAO 0.4x WOT; posterior ocellus distant from crest of vertex 1.5x DAO. Vertex somewhat convex; VOL 0.7x HE.

Mesosoma: thoracic dorsum weakly coriaceous, except propodeal disc strongly coriaceous, punctures smaller and sparser than those of frons. Pronotal disc 0.8x length of mesoscutum. Notaulus complete. Propodeal disc 0.7x as long as wide, irregularly rugose, median carina incomplete, lateral corner of posterior part elevate, polished and shinny; lateral surface of propodeum weakly coriaceous; declivity imbricate, median carina complete. Fore femur 3.0x as long as wide.

Metasoma ( Fig. 71 View FIGURES 66–77 ): tergite II with pair of minute tubercle, each tubercle has small pit on top, and few setae directed backward, lateral margin with short setae. Hypopygium with posterior margin concave.

Genitalia: ( Figs. 72–77 View FIGURES 66–77 ): paramere very wide in middle in dorsal view; apex rounded and arched mesad; ventral margin strongly concave apically, apical corner small and rounded, somewhat concave basally; dorsal margin convex with subapical acute concavity (72, 73, 77). Basiparamere wide, dorsal margin somewhat concave. Cuspis long and arched, apex rounded, digitus with apex pointed and smooth in upper margin. Aedeagus with ventral ramus shorter than dorsal body ( Fig. 72 View FIGURES 66–77 ), 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, narrow and arched dorsad ( Fig. 76 View FIGURES 66–77 ); dorsal body with two pairs of apical lobes, outer pair laminar, surface vertical, wide, apex straight, dorsal margin convex and irregular at apex in lateral view ( Fig. 75 View FIGURES 66–77 ), and sinuous in dorsal view ( Fig. 73 View FIGURES 66–77 ), ventral margin with subapical strong concavity and projection serrate, inner pair irregular in lateral view, membranous, hairy and granulate in ventral view; basal bar triangular, upper margin concave, lower margin straight and separated from basal plate; connector with lateral expansion concave, mid part darker and rounded; basal plate simple ( Fig. 73 View FIGURES 66–77 ). Apodeme of aedeagus extending beyond elliptical genital ring.

Material examined: HOLOTYPE: male, TRINIDAD [and TOBAGO], [Saint George], 16 km N Arima, Andrews Trace, 620 m up. Montane , rain for[est], [~ 10º30’N 61º16’W], 7–24.vi.1993, FIT, S. & J. Peck col. ( CNCI) GoogleMaps . PARATYPES: TRINIDAD [and TOBAGO]: 8 km N Arima, Simla Res [earch] Sta [tion], trop[ical] for[orest], [~ 10º38’N 61º17’W] GoogleMaps , 15 males, 260 m, 6–14.vi.1993, FIT, S. & J. Peck col. ( CNCI) ; 5 males, 240 m, 6–10.vi.1993 ( CNCI) ; 13 males, lower montane rain for[orest], 260 m, 14–24.vi.1993, FIT, S. & J. Peck col. ( CNCI) ; 13 males, 24.vi–8.vii.1993, FIT, S. & J. Peck col., 93–57 ( CNCI) ; 1 male, 13 km S Arima, 2 km N Talparo, Quesnell Farm , rain forest, 50 m, [~ 10º30N 61º16W], 12–22.vi.1993, S. & J. Peck col. ( CNCI) GoogleMaps ; [Saint George]: 9 males, same data as holotype GoogleMaps ; 1 male, 19 km N Arima, Lalaja Trace , montane rain for[est], 650 m, [~ 10º38’N 61º17’W], 8–14.vi.1993, FIT, S. & J. Packer, 93–20 ( CNCI) GoogleMaps ; [Saint George], Tunapuna, M[oun]t S[ain]t Benedict, Summit, rain forest, MT Tabor , 550 m, [~ 10º38’N 61º23’W], FIT, S. & J. Peck col. ( CNCI) GoogleMaps : 5 males, 5–21.vi.1993, 93–20; 4 males, 21.vi–8.vii.1993; 1 male, ravine for[est] Bottom , 230 m, 4– 13.vi.1993, FIT, S. & J. Peck col., 93–3 .

Variation: body length from 2.55 to 4.80 mm; clypeus light castaneous and subtrapezoidal; pronotum black with narrow posterior line lighter; tergal process with circular, much small and very shallow lateral depressions and tubercle smaller than in holotype; aedeagus with ventral margin of dorsal body with subapical projection not serrate; basal bar connected to basal plate by narrow line; apodeme of aedeagus extending beyond elliptical genital ring.

Comments: This species is similar to D. balteus , D. incurvatus , D. perventriosus , D. signatus and D. uncus by having the lateral of the outer lobe of the dorsal body in dorsal view with an acute pointed. However the dorsal bodies of these species are discerned by the length and the width of the outer lobe (see Figs. 18 View FIGURES 17–27 , 36 View FIGURES 28–40 , 67, 73 View FIGURES 66–77 , 85 View FIGURES 78–89 , 91 View FIGURES 90–102 ).

Etymology: the specific Latin epithet refers to shape of the outer lobe of the dorsal body in lateral view, which resembles a horse mane.

Distribution: Trinidad and Tobago.


Canadian National Collection Insects