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Checklist for Superfamily Cheiruroidea
and region Williamson County (Illinois, USA)


Class
 		Trilobita ♰
Walch, 1771
Trilobites		7
7
7		Families
Genera
Species		 
Taxom
 

Order
 		Phacopida ♰
Salter, 1864
5
5
6		Families
Genera
Species		 
Taxom
 

Suborder
 		Cheirurina ♰
Harrington, 1957
2
2
2		Families
Genera
Species		 
Taxom
 

Superfamily
 		Cheiruroidea ♰
2
2
2		Families
Genera
Species		 
Taxom
 


List of families for Williamson County (Illinois)
2 Families width 2 Species
Cheiruridae Salter, 18641SpeciesTaxom
Hammatocnemidae1SpeciesTaxom


Genera for Williamson County (Illinois)
2 Genera with 2 Species
Ceraurus Green, 18321SpeciesTaxom
Sphaerexochus Beyrich, 18681SpeciesTaxom


Species list for Williamson County (Illinois)
2 Species
Ceraurus pleurexanthemus ♰ Green, 1832
Sphaerexochus romingeri ♰ Hall, 1868

Subnodes of Cheiruroidea with occurrences in Williamson County (Illinois)
FamilyCheiruridae ♰
Salter, 1864
1
1		Genus
Species
Taxom

FamilyHammatocnemidae ♰
1
1		Genus
Species
Taxom