Borchsenius, N.S. 1947b [On the taxonomic significance of morphological characters of mealybugs (Coccoidea, Pseudococcus).]. Doklady Akademii Nauk SSSR. Moscow (n.s.) 58: 2109-2110.

Notes: Key to 6 mealybugs related to P. maritimus; apparently first mention of P. columbianus, elisae, peregrinabundus.