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Checklist for Order Chasmataspidida Caster & Brooks, 1956 (Chasmataspids)
and region Ordovician (Paleozoic)


Class
 		Merostomata
Woodward, 1866
Horseshoe crabs, Merostomates		4
9
2		Families
Genera
Species		 
Taxom
 

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


List of families for Ordovician
1 Family width 1 Species
Chasmataspididae Caster & Brooks, 19561SpeciesTaxom


Genera for Ordovician
1 Genera with 1 Species
Chasmataspis Caster & Brooks, 19561SpeciesTaxom


Species list for Ordovician
1 Species
Chasmataspis laurencii ♰ Caster & Brooks, 1956

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