Rhynchium Spinola, 1806

Pham, Phong Huy & Kumar, P. Girish, 2016, Taxonomic notes on the genus Rhynchium Spinola (Hymenoptera: Vespidae: Eumeninae) from Vietnam, with a first checklist of the species worldwide, Ecologica Montenegrina 7, pp. 530-537 : 531

Genus Rhynchium Spinola

Rygchium Spinola, 1806 . Ins. Ligur., 1: 84, genus (incorrect original spelling of Rhynchium Spinola ).

Rhynchium Spinola, 1806 , Ins. Ligus., 1:84, genus, emendation of Rygchium validated by Opinion 747 (ICZN, 1965). Type species: Rygchium europeaum Spinola, 1806 [= Vespa oculata Fabricius, 1781 ], by monotypy.

Rhynchium Billberg, 1820 , Enum. Ins.: 109. Emendation of Rychium (!) Spinola.

Rhynchium Sturm, 1829 , Verz. Ins. Nurnberg: 12. Emendation.

Rhygchium de Saussure, 1853 , Ét. Fam. Vesp. 1: xxxi, 276. Emendation.

Rhynchuium (!) de Saussure, 1863, Mém. Soc. Phy. Hist. Nat. Genéve 17: 242.

Eurrhynchium Dalla Torre, 1904 , Gen. Ins. 19: 33. New name.

Rygohium (!) Willink, 1982, Bol. Ac. Nac. Sci. 55: 195.

Diagnosis: Palpal formula 6:4; scutellum and posterior part of mesoscutum smooth, at most finely and sparsely punctuate; metanotum depressed medially and bluntly projecting laterally, as seen from above and in front distinctly concave; propodeum with valvula small and never rectangular, submarginal carina not projecting; tegula not evenly rounded posteriorly, emarginate adjoining parategula; tegula shorter than parategula posteriorly; midtibia with one spur; mid femora of male emarginated at base; forewing with second cubital cell not petiolate; third cubital cell further away from the apex of the radial cell; parastigma of fore wing more than half as long as the stigma; metasomal segment I sessile, with tergite without transversal ridge or carina, segment I with width more than half that of II, much less than twice as long as wide.