Takagi, S. 2008 An extraordinary pupillarial genus of scale insects associated with Annonaceae in tropical Asia (Sternorrhyncha: Coccoidea: Diaspididae).. Insecta Matsumurana (New Series) 64: 81-115.

Notes: Annonogena, gen. nov., is erected on the basis of four species, A. aculi/ahala, sp. novo (type species), from Mindoro Island and A. rotundilobata, sp. nov., A. echinata, sp. nov., and A. aristata, sp. nov., from Borneo Island, all occurring on plants of the family Annonaceae. The genus is pupillarial, with the adult female extremely simplified in external structures; the second-instar female is peculiarly featured, and the second-instar male lacks well-formed marginal appendages. The taxonomic position of the genus, therefore, is not easily determinable. The genus is referred to the tribe Parlatoriini mainly by means of excluding other possibilities. It is compared with Parlatoria proteus, the type species of Parlatoria, and the two known species of the pupillarial parlatoriine genus Ligaspis, and probable evolutionary changes from an ordinary parlatoriine form to the genus are discussed.