Pope, R.D. 1981 Rhyzobius ventralis (Coleoptera: Coccinellidae), its constituent species, and their taxonomy and historical roles in biological control.. Bulletin of Entomological Research 71: 19-31.

Notes: This species originally identified in a search for insects to control scale insect infestations on citrus and other crops in California; scales mentioned include Icerya purchasi, Eriococcus eucalypti, E. araucariae, Aonidiella aurantii, Quadraspidiotus perniciosus, Lecanium sp., and Chrysomphalus dictyospermi.