Where can I find an identification key for Pauropoda?

[Abdulkarim Elnaas]

Does anyone know of a key for the North American Puaropoda? What is the best way to identify a member of an obscure arthropod group such as this? I would appreciate any hints on where I should start searching.

Thanks in advance!

Also, here are the critters I want to ID, if anyone is curious.
One is in the first instar and I think the other is an adult. I have both on hand, preserved in ethanol.

 

[Ponerinecat]

Beautiful! Theres only one world expert on this group and they're vastly overlooked, so I'm not sure theres gonna be an easy key down to genus or species level. taxonomy is very vague and even microscope identification is difficult. Considering yours are not of a distinct group, I'm not sure identification will even be possible.