Review of the genus Wilkinsonellus Mason, 1981 (Hymenoptera, Braconidae, Microgastrinae) from Vietnam, with a key to species and four new species

Abstract

The genus Wilkinsonellus Mason (Hymenoptera, Braconidae, Microgastrinae) is reviewed for Vietnam. Four new species are described and illustrated: W. flavicrus sp. n., W. masoni sp. n., W. nigratus sp. n., and W. nigrocentrus sp. n. A key to the described species of the genus is provided.

Three new species in the genus Wilkinsonellus (Braconidae, Microgastrinae) from the Neotropics, and the first host record for the genus

“…Wilkinsonellus can be differentiated from other Microgastrinae genera by the combination of the following characters: body coloration largely yellowish (Figs 1A, L; 3A; 4A); propodeum with a median carina, spiracles surrounded by carinae (Figs 1F, 3G, 4H); propleuron with a posterior flange (Figs 1D, 3F, 4B); scutellum sculptured medio-posteriorly and often with subapical carina (Figs 1M–N, 3G, 4H); lunulae of scutellum wide (Figs 1E–F, 3G, 4G–H) (Long and Achterberg 2011), fore wing with second submarginal cell (“areolet”) open distally, thus vein r-m absent (Fig. 3J); vein 1-1A strongly curved, laying very close to posterior margin of the fore wing (Fig.…”

“…3J); vein 1-1A strongly curved, laying very close to posterior margin of the fore wing (Fig. 3J) (Long and Achterberg 2003); tergite I with petiole 4–5 times as long as its apical width, more or less constricted medially and deeply grooved almost to apex (Figs 1H, Q–R; 3H; 4H–I) (Zeng et al 2011); median longitudinal area of metasomal tergite II slightly raised, usually poorly delimited (Figs 1G–H, Q–R; 3H, L; 4I), tergite II as long as tergite III, both smooth (Figs 2G–H, Q–R; 3H, L; 4I) (Whitfield 1997); hind coxa enlarged (Figs 1A, I, L, Q; 3A, H, L,) rarely short except in Wilkinsonellus flavicrus (Long and Achterberg 2011); ovipositor sheaths short (Figs 1A, G, J, 4A, J) (Whitfield 1997). …”

“…The original Wilkinsonellus species descriptions from Papua New Guinea (Nixon 1965), Australasian Region (Austin and Dangerfield 1992), Vietnam (Long and Achterberg 2003, 2011), India (Ahmad et al 2005) and China (Zeng et al 2011) were consulted to confirm that the new species matched the generic aspects of those descriptions. The cuticular sculpturing terminology utilized in this revision follows Harris (1979).…”

“…Between 2005-2007, two additional species were described, one from India (Ahmad et al 2005) and a further one from Vietnam (Long 2007). The most recent descriptions are from Taiwan and Vietnam (Long and van Achterberg 2011), when another four new species were added. Thus, the genus currently contains 15 described species, mainly from the Palaeotropics: Africa, south and Southeast Asia, Indonesia and Australia.…”

First record of the genus Wilkinsonellus (Hymenoptera, Braconidae, Microgastrinae) from Fiji with description of three new species

“…There are no available records of Wilkinsonellus from Fiji, except those newly reported here. In the Palaeotropics the genus has been previously reported in Africa, South and Southeast Asia, Indonesia, Australia and Papua New Guinea ( Nixon 1965 , Austin and Dangerfield 1992 , Long and van Achterberg 2003 , 2011 , Ahmad et al 2005 , Long 2007 ). Most, if not all, microgastrine species currently reported from Fiji (e.g.…”