Ferris, G.F. 1955d The genus Phenacaspis Cooley and Cockerell, Part I. (Insecta: Homoptera: Coccoidea) (Contribution No. 93).. Microentomology 20: 41-82.

Notes: A consideration of the genus Chionaspis Signoret; the first part of a complete review of the genus Phenacaspis, including 38 species; Phenacaspis takahashi n. sp.