A systematic catalogue of eight scale insect families (Hemiptera: Coccoidea) of the world : Aclerdidae, Asterolecaniidae, Beesoniidae, Carayonemidae, Conchaspididae, Dactylopiidae, Kerriidae and Lecanodiaspididae / Yair Ben-Dov ; in collaboration with Douglas R. Miller and Gary A.P. Gibson