Dissomphalus tumbuna, Mugrabi & Azevedo, 2016

Mugrabi, Daniele F. & Azevedo, Celso O., 2016, Description of 91 new species of DIssomphalus Ashmead (Hymenoptera: Bethylidae) from New Guinea Island and surrounded areas, Mémoires du Muséum national d'Histoire naturelle 209, pp. 451-564 : 557-558

Dissomphalus tumbuna n. sp.

Figures 88, 182, 273, 538-539

TYPE MATERIAL — Holotype, ♂, Papua New Guinea. New Guinea: (NE) Wau, 1100-1200m, VII.1968, N. L. H. Krauss ( BPBM).

DESCRIPTION — MALE: Body length 1.7 mm. Head and mesosoma dark castaneous; metasoma castaneous. Head (Figure 88). Mandible with four apical teeth. Clypeus with median lobe subtrapezoidal; median tooth subangulate; median carina complete apically and straight in profile. Frons weakly coriaceous. Mesosoma. Pronotal disc with anterior margin ecarinate, weakly coriaceous. Metapectal-propodeal complex with lateral and posterior areas partly carinate. Metasoma (Figure 182). Tergal process with deep, subcircular and sublateral pair of depression, 0.47 x as long as tergite II, diverging posterad, with long and thin setae on lateral area; each depression with large tubercle on its center, evenly wide in longitudinal section, very low, entirely dorsad, with broad pit on top, with small tuft of setae dorsad. Hypopygium (Figure

273) with median stalk evenly narrow, 1.3 x as long as hypopygial plate; lateral stalk quadrate; posterior margin strongly concave and pair of lateral elevations or excavated medially. Genitalia (Figures 538-539). Aedeagal dorsal body with apex lower than parameral apex, evenly narrow. Aedeagal ventral ramus with apex lower than aedeagal dorsal body apex; apical region with digitiform projections. Cuspis large. Genital ring strongly produced, each half straight in dorsal view.

FEMALE: Unknown.

ETYMOLOGY — The noun in apposition tumbuna means ancestors in Tok Pisin.

Figures 89, 183, 274, 540-541

TYPE MATERIAL — Holotype, ♂, Papua New Guinea. New Guinea, SE Mamai Pltn, E. of Port Glasgow, 150m, 31.I.1965, R. Straatman, Ligth Trap, Bishop ( BPBM).

DESCRIPTION — MALE: Body length 1.7 mm. Head and mesosoma dark castaneous; metasoma castaneous. Head (Figure 89). Mandible with three apical teeth. Clypeus with median lobe subtrapezoidal; median tooth rounded; median carina complete apically and straight in profile. Frons strongly coriaceous. Mesosoma. Pronotal disc with anterior margin ecarinate, strongly coriaceous. Metapectal-propodeal complex with lateral and posterior areas ecarinate. Metasoma (Figure 183). Tergal process with shallow, subcircular and sublateral pair of depression, 0.33 x as long as tergite II, diverging posterad, with small and thin setae on lateral area; each depression with large tubercle on its inner area, evenly wide in longitudinal section, very low, entirely laterad, with broad pit on top, with long tuft of setae laterad. Hypopygium (Figure 274) with median stalk evenly narrow, 1.0 x as long as hypopygial plate; lateral stalk triangular; posterior margin straight or nearly so and with median elevation. Genitalia (Figures 540-541). Aedeagal dorsal body with apex lower than parameral apex, wider medially, narrowing progressively apicad. Aedeagal ventral ramus with apex lower than aedeagal dorsal body apex; apical region rounded, narrow and smooth. Genital ring produced, each half convex in dorsal view.

FEMALE: Unknown.

ETYMOLOGY — The noun in apposition wailimbung means black palm in Tok Pisin.