Chiappe et al. (1999:3) proposed this taxon in the abstract of a monograph on Confuciusornis sanctus but did not discuss it further or propose a definition. The taxon was intended as the sister group to Ornithuromorpha, and both together were intended as the sister group to Confuciusornithidae. Thus it would appear that Enantiornithomorph is an undefined taxon, which is redundant with Enantiornithes.