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Checklist for Family Hammatocnemidae
and region Llandovery (Silurian)


Class
 		Trilobita ♰
Walch, 1771
Trilobites		30
181
385		Families
Genera
Species		 
Taxom
 

Order
 		Phacopida ♰
Salter, 1864
13
74
192		Families
Genera
Species		 
Taxom
 

Suborder
 		Cheirurina ♰
Harrington, 1957
4
37
105		Families
Genera
Species		 
Taxom
 

Superfamily
 		Cheiruroidea ♰
4
37
105		Families
Genera
Species		 
Taxom
 
FamilyHammatocnemidae ♰
2
15		Genera
Species		 
Taxom
 


Genera for Llandovery
2 Genera with 15 Species
Sphaerexochus Beyrich, 05SpeciesTaxom
Youngia Lindström, 010SpeciesTaxom


Species list for Llandovery
15 Species
Sphaerexochus calvus ♰ Mc Coy, 1846
Sphaerexochus centeo ♰
Sphaerexochus dimorphus ♰ WHITTINGTON ..., 1953
Sphaerexochus mirus ♰ Beyrich, 1845
Sphaerexochus seto ♰
Youngia boucoti ♰ CHATTERTON, 1984
Youngia brennardi ♰ Chatterton &..., 1984
Youngia douglasii ♰
Youngia folinsbeei ♰ Chatterton &..., 1984
Youngia johnsoni ♰ CHATTERTON, 1984
Youngia kathyae ♰ CHATTERTON, 1984
Youngia moroides ♰
Youngia steineri ♰ CHATTERTON, 1984
Youngia trispinosa ♰
Youngia walli ♰


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