Sericocampsomeris vietnamica Pham & van Achterberg, 2023

Pham, Phong Huy & van Achterberg, Cornelis, 2023, Taxonomic study of the tribe Campsomerini (Hymenoptera, Scoliidae) from northern Vietnam, with the description of a new species and a checklist of Vietnamese scoliid wasps, Deutsche Entomologische Zeitschrift 70 (2), pp. 369-385 : 369

Sericocampsomeris vietnamica Pham & van Achterberg sp. nov.

Fig. 7A-F

Specimens examined.

Holotype. ♂, Vietnam: Hai Phong, Cat Ba National Park, Cat Hai district , 20°47'50"N, 107°4'15"E, 7 m alt., 17.ii.2016, Coll. Phong Huy Pham (IEBR) . Paratype. 1♂, same place, date and collector as holotype (IEBR).

Diagnosis.

Sericocampsomeris vietnamica belongs to the genus Sericocampsomeris because of the following combination of characters: Body length 21-24.5 mm; frontal spatium densely punctate; frontal fissura present, extending up to anterior ocellus; anterior ocellus distinctly larger than posterior ocelli and set in a broad and shallow pit; wings yellowish and hyaline, forewing with two recurrent veins; integument black; clypeus marked with yellow; mandible, scapula, scutellum and metanotum entirely black; hind tibial spur black; metasoma with yellow bands on apical tergites and sternites; vestiture yellowish-white mixed with black; paramere slender, outer margin moderately angled medially, rounded apically, inner margin sub-straight, dorsal surface with dense and long setae, ventral surface with sparse and short setae; volsella with setae, moderately dense basally and sparse ventrally (for diagnosis of male Sericocampsomeris , see Betrem (1941) (page 92), Betrem and Bradley (1972) (page 12), Gupta and Jonathan (2003) (page 58), Liu et al. (2021b) (pages 146 and 159) and Taylor and Barthélémy (2021) (pages 20 and 42)).

This new species is similar to S. flavomaculata and S. stygia by having clypeus impunctate medially, with dense punctures posteriorly; frontal spatium densely and distinctly punctate; frontal fissure present, extending to anterior ocellus; anterior ocellus distinctly larger than posterior ocelli and set in a broad and shallow pit; scutellum and metanotum without longitudinal carina medially; dorso-median area of propodeum without distinct tubercle medially; T1-T3 with yellow bands apically. The new species is easily distinguished from S. flavomaculata and S. stygia by the following characters: head, scape, mesoscutum, scutellum and metanotum densely, coarsely, deeply punctate; clypeus sparsely punctate laterally and anteriorly; anterior margin of clypeus dark yellow; scapulae, scutellum and metanotum entirely black; T4 without yellow band apically; apical yellow bands on S2 and S3 narrow, broadly interrupted medially; head and mesosoma with yellowish setae; wings yellowish; metasoma with conspicuous blue reflections.

Description.

Male. Body length 21-24.5 mm (holotype: 22.5 mm); forewing length 20-21 mm (holotype: 20 mm).

Colour. Black, except yellow on anterior margin of clypeus; tegula testaceous (Fig. 7A, B ); T1-T3 with yellow bands apically, that on T1, very narrow and broadly interrupted medially, covering about one-sixth of T1, that on T2, narrowly emarginate medially, covering less than one-half of T2, that on T3, covering about one-fourth of T3 (Fig. 7E ); apical yellow bands on S2 and S3 narrow, broadly interrupted medially; metasoma with conspicuous blue reflections (Fig. 7C ).

Vestiture. Yellowish-white, except black on two last metasomal segments (Fig. 7D ), T5 with yellowish-white setae mixed black setae; tomentum silvery (Fig. 7C ). Wings hyaline, yellowish, forewing slightly infumated subapically, with two recurrent veins (Fig. 7E ).

Head. Clypeus rugose on apical half, impunctate medially, sparsely punctate laterally and anteriorly, densely punctate posteriorly (Fig. 7A ); frontal spatium densely and distinctly punctate, with small tubercle between antennal sockets (Fig. 7A ); frontal fissura weakly impressed, extending to anterior ocellus; front with a few scattered punctures; vertex with weak groove near hind ocelli elongated to inner eye margin; scape, vertex and gena with dense punctures; anterior ocellus distinctly larger than posterior ocelli and set in a broad and shallow pit.

Mesosoma. Scapula, mesoscutum, metanotum and dorsal propodeum with dense, coarse, deep punctures, interspaces much smaller than puncture diameter; scutellum with punctures separated by about their diameter (Fig. 7B ); scutellum and metanotum moderately convex, without longitudinal carina medially; mesopleuron and metapleuron densely punctate; lateral carina of propodeum distinctly prominent and long, extending beyond spiracle; dorso-median area of propodeum without being distinctly tuberculate medially.

Metasoma. Metasoma moderately densely and coarsely punctate (Fig. 7C, E ); two-thirds of S1 densely and coarsely punctate anteriorly; median tubercle on S2 moderately risen anteriorly; S7 with longitudinal carina medially (Fig. 7D ).

Genitalia (Fig. 7F ). Brown; paramere glabrous, dorsal surface with dense and long setae, ventral surface with sparse and short setae, outer margin with a few short setae, moderately-angled medially, rounded apically, inner margin sub-straight; base of volsella covered with moderately dense and long setae, with dense punctures; lamina volsellaris sparsely punctate, interspaces larger than puncture diameter, with sparse and short setae ventrally (Fig. 7F ); aedeagus with eight teeth, apical teeth conspicuously reduced.

Female. Unknown.

Etymology.

The species name refers to the country of origin, Vietnam.

Distribution.

Vietnam: Hai Phong Province (Fig. 8I ).

Figures

Figure 7. Sericocampsomeris vietnamica Pham & van Achterberg, sp. nov., holotype, male. A. Head, frontal view; B. Mesosoma, dorsal view; C. Metasoma, dorsal view; D. Metasoma, ventral view; E. Habitus, dorsal view; F. Genitalia, ventral view.

Figure 8. Distribution of the Scoliid species from northern Vietnam. A. Campsomeriella (Annulimeris) annulata annulata (Fabricius, 1793); B. Campsomeriella (Campsomeriella) collaris collaris (Fabricius, 1775); C. Campsomeriella (Campsomeriella) collaris quadrifasciata (Fabricius, 1798); D. Megacampsomeris shillongensis (Betrem, 1928); E. Micromeriella marginella marginella (KIug, 1810); F. Phalerimeris phalerata phalerata (de Saussure, 1858); G. Sericocampsomeris flavomaculata Gupta and Jonathan, 1989; H. Sericocampsomeris rubromaculata rubromaculata (Smith, 1855); I. Sericocampsomeris vietnamica Pham & van Achterberg, sp. nov.