Body oval to circular; moderately convex in cross section; body green in newly formed females turning reddish brown in older females; without obvious wax covering except just before oviposition when covered with sparse mealy secretion; ovisac produced beneath and behind female, convex, often with mediodorsal goove, white, flocculent, about 1 or 2 times length of body. Occurring on succulent leaves of host. Males are common. Eggs laid inside ovisac.
This species was intercepted 1 time at U. S. ports-of-entry between 1995 and 2012, with the specimen originating from Italy (Italy, Aizoaceae). We also have examined specimens taken in quarantine from Italy (Mesembryanthemum, Portulaca), Mexico (Aizoaceae), and Portugal (Mesembryanthemum). ScaleNet includes hosts in Aizoaceae and Chenopodiaceae; species of Carpobrotus (=Mesembryanthemum) are the most common. ScaleNet distribution records for P. mesembryanthemi include the Afrotropical, Australasian, Nearctic, Neotropical and Palaearctic regions. No other species of Pulvinariella have been taken in quarantine.