The taxonomic status of Agelanius antenninus (Philip, 1969) was evaluated on the basis of a morphological study of the holotype, described from Huánuco, Peru. Results of analyses of A. antenninus and its morphological comparison with A. meridianus Rondani, the type-species of Agelanius Rondani, proved that A. antenninus does not belong to the genus Agelanius. The subgenus Styphocera Philip is reinstated as a valid subgenus of Stypommisa Enderlein. Thus, the generic combination Stypommisa (Styphocera) antennina Philip should be reinstated for this species.