In 1996, Kevin Thiele and Pauline Ladiges published a revised arrangement based on a cladistic analysis of morphological characters of "Banksia". They took up the question of an affinity of "Isostylis" with "Dryandra", finding George's arguments unconvincing but failing to find any further evidence for or against "Isostylis"s placement within "Banksia". They eventually accepted both of George's subgenera, using each as an outgroup in the analysis of the other. Thus their analysis yielded no information about the circumscription and placement of "Isostylis", and their arrangement maintained "Isostylis" as a subgenus.