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Checklist for Order Chasmataspidida Caster & Brooks, 1956 (Chasmataspids)
and region Pennsylvania (USA)


Class
 		Merostomata
Woodward, 1866
Horseshoe crabs, Merostomates		12
21
20		Families
Genera
Species		 
Taxom
 

Order
 		Chasmataspidida ♰
Caster & Brooks, 1956
Chasmataspids		1
1
0		Family
Genus
Species		 
Taxom
 


List of families for Pennsylvania
1 Family width 0 Species
Chasmataspididae Caster & Brooks, 19560SpeciesTaxom


Genera for Pennsylvania
1 Genera with 0 Species
Chasmataspis Caster & Brooks, 1956
0SpeciesTaxom

Subnodes of Chasmataspidida with occurrences in Pennsylvania
FamilyChasmataspididae ♰
Caster & Brooks, 1956
1
0		Genus
Species
Taxom