The pityococcids have generally been considered to be part of the Margarodidae sensu lato and originally were placed with the Coelostomidiidae (=Coelostomidiinae). Gullan and Sjaarda (2001) presented a phylogeny that showed affinities with the coelostomidiids and monophlebids but suggested that pityococcids might better be placed in its own higher taxon. Pityococcidae McKenzie was first treated as a family by Koteja (1998a).
Extant pityococcids only occur in the Nearctic region. Cancerococcus (a fossil) is known from Jutland (=Denmark).
Pityococcids are found on the genus Pinus.
Little is known about the bionomics of species in this family. Gill (1993) suggested that they most likely have a single generation each year. They occur under the bark of their host and have a legless cyst stage.