A strictly phylogenetic classification of the supergeneric taxa within the subfamily Timpanoginae includes the Attenellini, n.
tribe, consisting of Attenella Edmunds ; the Eurylophellini, n. tribe, consisting of Dentatella Allen, n. stat., and Eurylophella
Tiensuu ; and the Timpanogini, n. tribe, consisting of Timpanoga Needham and Dannella Edmunds, n. stat. Dentatella danutae McCafferty, n. sp., is described from larvae taken from a stream in southern Québec, Canada. The new species differs from the obviously closely related D. bartoni (Allen) by possibly striking coloration differences as well as numerous slight structural differences.