The loss of the specimen and the mention by Tillyard of a second insect fossil from the same site, later described as Robinjohnia tillyardi resulted in much confusion regarding the taxonomic affiliations of P. patricia. Robinjohnia, a four winged insect which is now placed in the order Mecoptera.
The loss of a specimen and Tillyard's discovery of another insect fossil from the same site caused confusion about the taxonomic placement of P. patricia.  This confusion was later resolved by identifying the second fossil as Robinjohnia tillyardi, which is now classified within the order Mecoptera.