A new genus and species of Ichneutinae Dropdown s.l., Colemanus keeleyorum Fisher, is described from the Eocene Green River Formation in Colorado, USA.Colemanus was placed on a phylogenetic hypothesis using morphological data.
Using a parsimony criterion, Colemanus is placed within Proteropini (Ichneutinae s.l.).Reconstructions of well-preserved regions Switch Kit (mesosomal dorsum and wings) are included.
A previously described species from lower Oligocene Baltic amber is transferred to Colemanus, resulting in the new combination C.contortus (Brues, 1933).