Stenonartonia occipitalis

Garcete-Barrett, Bolívar R., 2011, A revision of the genus Stenonartonia Giordani Soika 1973 (Hymenoptera: Vespidae: Eumeninae), Zootaxa 2868, pp. 1-50 : 8

Species-group of Stenonartonia occipitalis

This small group is quite distinct. Both species are rather stout bodied, similar to species in the genus Ancistrocerus Wesmael and share the following features: Occipital carina continuous at middle. Female vertex with specialized area broadly oval. Humeral angle projecting. Tegula densely micropunctate. Axillar depression strong. Anterior axillary fossula small and exposed. Scutellum flat, declivitous at the side, where it forms an opaque (similar to the remainder of the scutellum) lamellar projection over the opening of the axillary fossa. Opening of the axillary fossa rather slit-like. Scutellar crest separated behind from scutellum by a sulcus. Metanotal ridge high and sharp. There are weak indications of epicnemial carina. Mesepisternal sulcus deep and wide. Posterior propodeal concavity rounded and well marked. Mid propodeal carina complete. Propodeal side covered above with large, flat bottomed alveoli. Apical propodeal lamella broadly rounded and inseparably fused with the valvula. Metasomal segment 1 short and broad. T1 strongly bent above in side view and with a rather sharp transverse carina. S1 crescent shaped. T2 with pregradular area dull and gradulus shallow.