Lissodynerus, Giordani Soika, 1993

Carpenter, James M. & Brown, Graham R., 2021, Catalogue of the Australian Eumeninae (Hymenoptera: Vespidae), Zootaxa 4919 (1), pp. 1-68 : 5

Lissodynerus = Pararrhynchium

When Giordani Soika (1993b, 1994) described the genus Lissodynerus , he compared it only to Stenodyneriellus Giordani Soika (1962 [1961]). In fact, Lissodynerus is like Pararrhynchium de Saussure 1855 in all respects. The only key to include both genera is that of Tan et al. (2018), which separates the two genera at their couplet 30, with the prestigma of the forewing longer than half the length of the pterostigma leading to Lissodynerus inter alia , vs. prestigma half the length of pterostigma or less leading to Pararrhynchium et al. This was based on the single Chinese species of Lissodynerus , L. septemfasciatus feanus ( Giordani Soika 1941) . Other species of Lissodynerus are variable in the length of the pterostigma, and may have it quite short (cf. Kumar et al. 2015: fig. 5). This character cannot be used to separate the genera, and in other important characters they are the same: clypeus widely and shallowly emarginate; tegula short, not distinctly exceeding parategula; narrow axillary fossa; propodeum raised and usually carinate dorsally; first metasomal tergum weakly transversely carinate; metasomal terga with a variable number having well developed lamellae. These genera should not be maintained as distinct, and so they are synonymized here.