Foldi, I. 2006 Deux nouvelles Cochenilles du Brésil et de l'Équateur (Hemiptera, Sternorhyncha, Coccoidea). [Two new scale insects from Brazil and Ecuador (Hemiptera, Sternorhyncha, Coccoidea).]. Bulletin de la Societe Entomologique de France 111: 101-113.

Notes: Two new species of scale insects (Hemiptera, Coccoidea), Protortonia ecuadorensis n. sp. (Monophlebidae) on Salix sp. (Salicaceae) in Ecuador and Stigmacoccus paranaensis n. sp. (Xylococcidae) on the trunk of Inga sp. (Leguminosae) in Brazil, were discovered. The adult female and male at P. ecuadorensis, n. sp. and the first and second instar nymphs and the adult female of S. paranaensis.