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Checklist for Family Trinucleidae Hawle & Corda, 1847
and region West USA (USA)


Class
 		Trilobita ♰
Walch, 1771
Trilobites		131
761
1351		Families
Genera
Species		 
Taxom
 

Order
 		Asaphida ♰
Salter, 1864
23
143
223		Families
Genera
Species		 
Taxom
 

Suborder
 		Asaphina ♰
Fortey & Chatterton, 1988
22
135
216		Families
Genera
Species		 
Taxom
 

Superfamily
 		Trinucleioidea ♰
Delo, 1935
4
13
12		Families
Genera
Species		 
Taxom
 
FamilyTrinucleidae ♰
Hawle & Corda, 1847
3
4		Genera
Species		 
Taxom
 


Genera for West USA
3 Genera with 4 Species
Cryptolithoides Whittington, 19722SpeciesTaxom
Cryptolithus Green, 18322SpeciesTaxom
Trinucleus MURCHISON, 1839
0SpeciesTaxom


Species list for West USA
4 Species
Cryptolithoides fittsi ♰ Ulrich & Whi..., 1941
Cryptolithoides reticulatus ♰ Ross & Shaw, 1972
Cryptolithus fittsi ♰
Cryptolithus tesselatus ♰ Green, 1832


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