The fossils of Eoprephasma were studied by Thompson Rivers University, Burke Museum of Natural History and Culture, and the journal Canadian Entomology.
The three Susumanioidea fossils, part/counterpart F-846 and F-951 plus F-1392 and F-1393 are deposited in the Thompson Rivers University. The counterpart specimen F-1099 is also in the Thompson Rivers University collections, while the part side, PB-3825 is at the Burke Museum of Natural History and Culture. All the insects were first studied by Canadian entomologist S Bruce Archibald and German entomologist Sven Bradler, with their 2015 type description of the new genus and species being published in the journal Canadian Entomology. 
