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Checklist for Superorder Ephemeropteroidea Rohdendorf, 1968
and region Williamstown (Decatur County, Indiana, USA)


Class
 		Insecta
Linnaeus, 1758
Insects, True insects		66
100
110		Families
Genera
Species		 
Taxom
 

Subclass
 		Pterygota
Lang, 1888
Winged insects		66
100
110		Families
Genera
Species		 
Taxom
 

Infraclass
 		Palaeoptera
Crampton, 1915
Ancient winged insects		9
15
19		Families
Genera
Species		 
Taxom
 

Superorder
 		Ephemeropteroidea
Rohdendorf, 1968
2
2
2		Families
Genera
Species		 
Taxom
 


List of families for Williamstown (Decatur County Indiana)
2 Families width 2 Species
Ephemeridae Leach, 1817Burrowing mayflies1SpeciesTaxom
Heptageniidae Needham, 1901Flat-Bodied Up-Wings Heptageniidae1SpeciesTaxom


Genera for Williamstown (Decatur County Indiana)
2 Genera with 2 Species
Hexagenia Walsh, 1829Giant Mayflies1SpeciesTaxom
Stenacron Jensen, 1839Light Cahills1SpeciesTaxom


Species list for Williamstown (Decatur County Indiana)
2 Species
Hexagenia (Hexagenia) limbata Serville, 1829Burrowing mayfly
Stenacron interpunctatum Say, 1839Ginger quill

Subnodes of Ephemeropteroidea with occurrences in Williamstown (Decatur County Indiana)
OrderEphemeroptera
Hyatt & Arms, 1891
Mayflies, Mayflies Anglers Curse, Mayflies Greendrakes, Mayflies Olives Etc, mayfly, Shadflies		2
2
2		Families
Genera
Species
Taxom