Newell, W., & Cockerell, T.D.A. 1898 [Descriptions of new coccids.]. In Osborn, H., Notes on Coccidae Occurring in Iowa.. Proceedings of the Iowa Academy of Sciences 5: 224-31.

Notes: Aspidiotus ancylus var. serratus Newell and Cockerell n. var. and A. osborni Newell and Cockerell n. sp.; recorded under Osborn (1898) in Morrison and Renk 1957 bibliography.