Foldi, I., & Cox, J.M. 1989 A new genus and species of mealybug from the Venezuelan Andes, with a guide to the identification of genera in the grass-feeding Heterococcus-group (Homoptera: Pseudococcidae).. Journal of Natural History 23: 1119-1131.

Notes: Abstract: Key to adult females of 7 genera: Stachycoccus, Annulococcus, Paramococcus n.gen., Heterococcopsis, Brevennia, Pseudorhodania & Heterococcus; description of n.gen. & Parmococcus venezuelanus n.sp. (both male & female); appendix describes genera & lists spp.; these grass-feeding genera are mostly in Palaearctic Region; also in Afrotropical, Nearctic, Neotropical & Oriental Regions; live in leaf axils of grass.