Hyperomyzus (Neonasonovia) fronki (Knowlton 1945) = Hyperomyzus (Neonasonovia) petiolaris (Knowlton & Allen 1945)

The BMNH collection has paratypes of both these species, both described in the genus Amphorophora in the same year from Ribes in western USA. No differences could be found to justify separate species status. The description of petiolaris antedates that of fronki, which has been placed as a subspecies of H. (N.) nabali (Oestlund) in recent catalogues.