The adult form was not observed until 1969 to be that described by Carl Wilhelm Erich Zimmer in 1904, and only in 1973 was Amphionides placed in its own order by Donald I. Williamson.
Non foi até 1969 cando se observou unha forma adulta (que fora descrita por Carl Wilhelm Erich Zimmer en 1904) e só en 1973 foi creada a súa propia orde por Donald I. Williamson.