Wise recombined two of the original species identified by Tillyard, P. hamiltoni and P. olingoides, into a new genus called Confluens.

[4] In 1976, Donald R. Cowley synonymised P. chiltoni (the former type species of the genus) and P. unicolor Wise, 1958 with P.

[6] Tillyard's original text (the type description) reads as follows: Allied to Pycnocentria McL, from which it differs by the absence of the web fold in forewings of male, and the consequent normal structure of the radial sector in both sexes.

Stem of R2+3 in hindwing of male also weakened or obsolete, leaving radial cell open above.

Maxillary palpi of male short and hairy, not projecting beyond end of first antennal segment.