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Checklist for Subfamily Mesonacinae
and region Lower Cambrian (Cambrian)


Class
 		Trilobita ♰
Walch, 1771
Trilobites		72
418
720		Families
Genera
Species		 
Taxom
 

Order
 		Redlichiida ♰
Richter, 1932
22
114
251		Families
Genera
Species		 
Taxom
 

Suborder
 		Olenellina ♰
Walcott, 1890
7
45
102		Families
Genera
Species		 
Taxom
 

Superfamily
 		Olenelloidea ♰
Walcott, 1890
2
28
78		Families
Genera
Species		 
Taxom
 
FamilyOlenellidae ♰
Walcott, 1890
10
42		Genera
Species		 
Taxom
 
SubfamilyMesonacinae ♰
1
1		Genus
Species		 
Taxom
 


Genera for Lower Cambrian
1 Genera with 1 Species
Mesonacis Walcott, 18591SpeciesTaxom


Species list for Lower Cambrian
1 Species
Mesonacis vermontanus ♰ Hall, 1859