Checklist for Infraclass Palaeoptera Crampton, 1915 (Ancient winged insects) and region Douglass (Montgomery County, Pennsylvania, USA)
List of families for Douglass (Pennsylvania) 3 Families width 3 Species
Genera for Douglass (Pennsylvania) 3 Genera with 3 Species
Species list for Douglass (Pennsylvania) 3 Species
Subnodes of Palaeoptera with occurrences in Douglass (Pennsylvania)
Links, sources and further information Palaeoptera at itis.gov
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