Seven new species of long–horned caddisfly together with Oecetis complexa Kimmins form a discrete set in the Australian Oecetis fauna, here called the complexa–group, based on wings with a long footstalk on Fork 1, male inferior appendages four–lobed, and phallus with paired spiny parameres. Characteristics of this group appear to conflict with the placement of Oecetis complexa in the most recent subgeneric and species group classification of world Oecetis.