Tranfaglia, A. 1973 Study on the Homoptera Coccoidea I. On the discovery of Pseudococcus obscurus Essig in Campania, first record for the Italian fauna.. Bollettino del Laboratorio di Entomologia Agraria 'Filippo Silvestri'. Portici 30: 294-299.

Notes: Distinctive characters of P. obscurus and maritimus; hosts and distribution; P. obscurus reported for the first time in Italy.