Along with the genus description, the paper contained descriptions of the type species Ypresiomyrma orbiculata and Ypresiomyrma bartletti, both from the McAbee Fossil Beds in British Columbia, part of the Eocene Okanagan Highlands lake system.
The following cladogram generated by Archibald and colleagues show the possible phylogenetic position of Ypresiomyrma among some ants of the subfamily Myrmeciinae.