Hambleton, E.J. 1946 Studies of hypogeic mealybugs.. Revista de Entomologia. Rio de Janeiro 17: 1-77.

Notes: A monographic review of group, including 7 genera (4 presented as new - Brevicoccus, Morrisonella, Neorhizoecus, Radicoccus) and 53 species (27 presented as new); keys to genera and species.