Koteja, J. 1986e Morphology and taxonomy of male Ortheziidae (Homoptera, Coccinea).. Polskie Pismo Entomologiczne 56: 323-374.

Notes: Detailed description of external morphology of males of Orthezia urticae, O. sp., and Newsteadia floccosa; relationships within the Ortheziidae and within scale insects; author speculates that this family represents an isolated, blind branch with the archeococcids.