[1] Pristomyrmex rasnitsyni is known from a solitary fossil, the holotype, specimen number 1.ii.1969, which is currently in the collections of the University of Copenhagen.

About twenty-four genera with thirty-five species of ants have been identified as inclusions in Scandinavian amber.

[3] The fossil was first studied by paleoentomologists Gennady M. Dlussky of the Moscow State University and A. D. Radchenko of the Polish Academy of Sciences.

The specific epithet rasnitsyni is a patronym honoring Russian paleoentomologist Alexandr Pavlovich Rasnitsyn.

The head is shorter than it is wide, with a clypeus sporting teeth on the sides and a single central tooth.