PaleoDB taxon number: 211744
Full reference: E. S. Richardson. 1956. Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois. Fieldiana: Geology 12(2):3-76
Sister taxa: none
Type specimen: FMNH PE791, a forewing. Its type locality is Mazon Creek (FMNH collection), which is in a Westphalian D deltaic mudstone in the Carbondale Formation of Illinois.
Average measurements (in mm): forewing 44.0 x 12.0