Okinawepipona Yamane, 1987

Nguyen, Lien Thi Phuong & Xu, Zaifu, 2014, Two new species of the genus Okinawepipona Yamane (Hymenoptera: Vespidae: Eumeninae) from Vietnam and China, Zootaxa 3795 (1) : -

Genus Okinawepipona Yamane, 1987

Okinawepipona Yamane, 1987: 52 .

Type species: Anterhynchium kogimai Giordani, 1986 , by original designation and monotypy.

Diagnosis. According to Yamane (1990), this genus was separated from related genera by combination of following characteristics: clypeus moderately convex, as high as wide, narrowly emarginated at apex in both sexes; male mandible not deeply emarginated on inner side; maxillary palpi 5-segmented; labial palpi 3-segmented; scutellum flat; metanotum medially not concave; tegula not extending beyond apex of parategula; propodeum without lateral crest; anterior vertical surface of metasomal tergum I almost impunctate, clearly separable from posterior horizontal part, but not by carina; laterally tergum divided by sharp carina into upper and lower part; metasomal segment I slightly narrower than segment II; terga I–V each with dark apical spot medially where integument is weakly impressed; narrow basal part of sternum II with 14–18 strong, longitudinal carinae; parastigma of fore wing short, less than half as long as stigma.

Some Eumeninae genera related to Okinawepipona , e.g. Gribodia Zavattari, 1912 , also have palpal formula 5:3, but can be distinguished from Okinawepipona by some characters: foveae on female vertex separated by gap about 3 × diameter of fovea (foveae very close in Okinawepipona , separated by gap about diameter of fovea), metasomal segment I about as wide as segment II, parastigma of fore wing about half as long as stigma, female mandiblular teeth wide and short with nearly straight inner margin (narrower and much longer with round margin in Okinawepipona ) (L.T.P. Nguyen, unpublished).

In the two species described below, some characters listed in the diagnosis of the genus Okinawepipona by Yamane are variable among species and should be omitted from the diagnosis: anterior vertical surface of metasomal tergum I almost impunctate, scutellum flat, metanotum medially not concave, terga I–V each with dark apical spot medially where the integument is weakly impressed.