Newly mature adult female light purple with medial yellow stripe on dorsum; older females darker purple, without medial stripe. Crystalline rods noticeable along body margin, curved posteriorly, short rods in medial area of head and anteriorthorax. Felted ovisac white, enclosing adult female. Occurring on fleshy part of host or on spines.
This species was intercepted 3 times at U. S. ports-of-entry between 1995 and 2012, with specimens originating from Mexico and South Africa. We also have examined specimens taken in quarantine from Australia (Euphorbia); Canada (cactus); England (Mammillaria); Germany (Echinocactus, Echinopsis, Mammillaria, Rebutia); Israel (Astrophytum); Japan (Haworthia, Lobivia, Mammillaria); Mexico (Ancistrocactus, Astrophytum, Cereus, Corypantha, Crassula, Echeveria, Echinocactus, Echinocereus, Escobaria, Ferocactus, Gymnocactus, Lophophora, Mammillaria, Opuntia, Pelecyphora, Pilocereus, Thelocactus, Wilcoxia); The Netherlands (cactus); Peru (unknown host); and South Africa (Aloe, Stapelia). ScaleNet includes hosts in the Cactaceae only, on which it is most commonly intercepted. ScaleNet distribution records for A. coccineus includes South Africa in the Afrotropical region; Australia, Hawaiian Islands and New Zealand in the Australasian region, several countries in the Brazil in the Neotropics. No species of Acanthococcus other than A. araucariae (Maskell), A. coccineus, and A. dubius (Cockerell) have been intercepted at a U. S. port-of-entry.