Dissomphalus mwalo, 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 : 519-520

Dissomphalus mwalo n. sp.

Figures 48, 144-146, 236, 431-432

TYPE MATERIAL — Holotype, Papua New Guinea. ♂, NE New Guinea, Morobe Distr, Kilolo Ck., 1070m, 7km W Wau, 15-25.VIII.1967, Tawi Collector, Bishop ( BPBM). Paratypes. Papua New Guinea. New Guinea (NE), 1♂ Kassam Pass, 1550m, 14-20.XI.1967, Malaise tr, P. Colman Collector, Bishop ( BPBM); Morobe District, 1♂ Wau, 1200m, 16.VIII.1961, J. Sedlacek, Malaise Trap, Bishop ( BPBM); 1♂ Mt. Kaindi, N. Peak, 2350m, 1-14.IX.66, G. A. Samuelson Collector, Bishop Museum ( BPBM); 1♂ Mt. Suckling, 500m, Mayu I, 13-16.VII.1972, J. L. Gressitt, Malaise Trap, Bishop Museum ( BPBM).

DESCRIPTION — MALE: Body length 2.8-3.5 mm. Head and mesosoma black; metasoma castaneous or dark castaneous. Head (Figure 48). Mandible with four apical teeth. Clypeus with median lobe subtrapezoidal; median tooth subangulate, outlined by carina; 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 carinate. Metasoma (Figures 144-146). Tergal process absent, when present, without depressions nor setae; when depressions present each one with tubercle very small, conical in longitudinal section, low, entirely laterad, without pit on top; or with deep, longitudinally elliptical and sublateral pair of depression, 0.53 x as long as tergite II, diverging posterad, with long and thin setae on lateral area, inner margin of depression slightly higher then median region of tergite II; each depression with small tubercle on its inner area, evenly wide in longitudinal section, low, entirely laterad, with small pit on top, with very small tuft of setae anterad. Hypopygium (Figure 236) with median stalk evenly narrow, 0.88 x as long as hypopygial plate; lateral stalk triangular; posterior margin convex and excavated medially. Genitalia (Figures 431- 432). Basal margin of paramere strongly excavated. Aedeagal dorsal body with apex lower than parameral apex, evenly

narrow, narrowing progressively apicad; apex with short and crenulated projection on ventral region. Aedeagal ventral

ramus with apex lower than aedeagal dorsal body apex, slightly bifurcated on apical region; apical region subangled and crenulated. Digitus small. Genital ring straight, each half straight in dorsal view.

FEMALE: Unknown.

REMARKS — This species has three pattern of tergal process. First, the process can be absent. Second, the process is present but there is no depression but the tubercle is regularly present. And third, the depresseion and tubercles are present.

ETYMOLOGY — The noun in apposition mwalo is a decorated armlets made from cone shells used for trade in the Kula Ring islands (Milne Bay Province, Papua New Guinea).