Guerinia Targioni Tozzetti, 1868: 724. Type species: Guerinia tinctoria Targioni Tozzetti (= Coccus serratulae Fabricius 1775)
Gueriniella Fernald, 1903: 331. Replacement name for Guerinia.
The concept of the genus Gueriniella did not change as a result of our phylogenetic study (Unruh & Gullan, 2008). The two species in the genus are morphologically identical, but we did not synonymize them because Gueriniella is distributed over a wide geographic range, we have examined only a small number of specimens, and we only included material of one species in the molecular analysis.