The genus contains a single described species, Asymphylomyrmex balticus and is known from a group of Middle Eocene fossils which were found in Europe.

[1] Baltic amber is approximately forty-six million years old, having been deposited during the Lutetian stage of the Middle Eocene.

There is debate as to what plant family the amber was produced by, with evidence supporting relatives of either Agathis or Pseudolarix genera trees.

Wheeler's 1915 type description of the new species and genus was published in the journal Schriften der Physikalisch-Okonomischen Gesellschaft zu Königsberg.

Based on the structure of the head and thorax, and on the lack of spurs on the middle and hind tibia, Wheeler suggested that the species was a highly derived group which did not leave any descendants, having gone fully extinct.