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Checklist for Order Ptychopariida Swinnerton, 1915
and region Butler County (Ohio, USA)


Class
 		Trilobita ♰
Walch, 1771
Trilobites		19
26
20		Families
Genera
Species		 
Taxom
 

Order
 		Ptychopariida ♰
Swinnerton, 1915
1
1
2		Family
Genus
Species		 
Taxom
 


List of families for Butler County (Ohio)
1 Family width 2 Species
Olenidae Burmeister, 18432SpeciesTaxom


Genera for Butler County (Ohio)
1 Genera with 2 Species
Triarthrus Green, 18382SpeciesTaxom


Species list for Butler County (Ohio)
2 Species
Triarthrus becki ♰ Green, 1832
Triarthrus eatoni ♰ Hall, 1838

Subnodes of Ptychopariida with occurrences in Butler County (Ohio)
SuborderOlenina ♰
Burmeister, 1843
1
1
2		Family
Genus
Species
Taxom



Links, sources and further information
Ptychopariida at gbif.org
Ptychopariida at irmng.org