Pinnachorista basilica was named by Martynova (1961). Its type specimen is PIN 676/580b, a forewing, and it is an impression. Its type locality is Suriekova I, ditch 6 (PIN collection 676), which is in a Wordian terrestrial siliciclastic in the Kazankovo-Markinskaya Formation of the Russian Federation.

It was recombined as Megachorista basilica by Novokshonov (1997).