Szklarzewicz, T., & Biliński, S.M. 1995 Structure of ovaries in ensign scale insects, the most primitive representatives of Coccomorpha (Insecta, Hemiptera).. Journal of Morphology 224: 23-29.

Notes: Discussion of ovaries of Orthezia urticae and Newsteadia floccosa; previous research covered ovaries of Aspidiotus hederae, Quadraspidiotus ostreaeformis and Lecanium pomeranicum.