Miller, D.R., Gill, R.J., & Williams, D.J. 1984 Taxonomic analysis of Pseudococcus affinis (Maskell), a senior synonym of Pseudococcus obscurus Essig, and a comparison with Pseudococcus maritimus (Ehrhorn) (Homoptera: Coccoidea: Pseudococcidae).. Proceedings of the Entomological Society of Washington 86: 703-713.

Notes: Detailed study; n. syns.; revised key.