Most classifications of Psallus have included a number of subgenera. There is little reason to believe that these species groupings are tied together by characters other than the form of the vestiture. Until a more detailed analysis of Psallus s.l. is published we refrain from introducing additional taxonomic decisions, but assert that we have little confidence in the monophyly of a broadly conceived Psallus, especially if that concept fails to consider the validity of Sthenarus.

We associate this nominal genus [Sthenarus] with Psallus because of the great structural similarity of the endosoma with that of Psallus s.s. spp. We note that two of the species currently residing in Sthenarus are placed there simply because the classical taxon [Psallus s.l.] served as a dumping ground and are in need of reexamination to determine their genus of proper placement.