Anterhynchium de Saussure, 1863

Selis, Marco & Carpenter, James M., 2023, Revision of the Afrotropical species of the genus Anterhynchium de Saussure (Hymenoptera: Vespidae: Eumeninae), Zootaxa 5233 (1), pp. 1-102 : 39

Genus Anterhynchium de Saussure, 1863

Anterhynchium de Saussure 1863: 205 , name for division I of genus Rhynchium Spinola in de Saussure 1852: 103 .

Type species: Rygchium synagroides de Saussure, 1852 , by subsequent designation of van der Vecht 1963: 73.

Differential diagnosis. Among the Afrotropical genera of Eumeninae with sessile metasoma and slit-like axillary fossa, the genus Anterhynchium appears superficially similar to Antodynerus de Saussure , Euodynerus Dalla Torre , Knemodynerus Blüthgen , Pseudagris de Saussure , Rhynchium Spinola , and Synagris Latreille. It can be easily distinguished by the following characters:

- clypeus not or shortly carinate (with long longitudinal carinae in Pseudagris );

- palpal formula 6-3 (5- 3 in Pseudagris , 3- 3 in Synagris );

- mesoscutum and scutellum entirely sculpted (largely impunctate in Rhynchium );

- tegula not equaling parategula (covering parategula in Knemodynerus , exceeding parategula in Antodynerus , equaling parategula in Euodynerus , Pseudagris , Rhynchium and Synagris );

- metanotum appearing subrectangular in dorsal view, evenly rounded or with a straight transverse carina (semicircular with a rounded carina in Antodynerus , with paired projections in Synagris );

- sides of propodeum crenulate or rounded (with a subtriangular depressed lobe in Synagris and some Antodynerus );

- posterior border of T1 similar to rest of surface (translucent in Antodynerus , Euodynerus and Knemodynerus ).