Williams, D.J. 1999 The mealybug species Ripersia theae Rutherford from Sri Lanka and Trionymus kayashimai Takahashi from Malaysia (Hem. Pseudococcidae).. Entomologist's Monthly Magazine 135: 91-93.

Notes: Examination of Ripersia theae determines it to be identical with Nipaecoccus viridis, while Trionymus kayashimai is determined to be identical with Dysmicoccus boninensis.