Alternative combination: Poroblattina fossa
Full reference: S. H. Scudder. 1895. Revision of the American fossil cockroaches with descriptions of new forms. Bulletin of the United States Geological Survey 124:1-176
Sister taxon: Apempherus complexinervis
Type specimen: Coll Lacoe 2083 ab, a tegmen. Its type locality is Cassville, which is in a Sakmarian terrestrial shale in the Cassville Shales Formation of West Virginia.
Average measurements (in mm): tegmen 16.5 x 6.0