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Checklist for Subfamily Tvaerenellinae Jaanusson, 1957
and region America (Continents)


Class
 		Ostracoda
Latreille, 1802
Mussel shrimps, Ostracods, Seed Shrimps		140
1215
5845		Families
Genera
Species		 
Taxom
 

Order
 		Beyrichicopida
Pokorny, 1954
21
127
464		Families
Genera
Species		 
Taxom
 

Suborder
 		Palaeocopa
Henningsmoen, 1953
13
93
288		Families
Genera
Species		 
Taxom
 

Superfamily
 		Hollinacea
Swartz, 1936
3
28
120		Families
Genera
Species		 
Taxom
 
FamilyTvaerenellidae
Jaanusson, 1957
7
21		Genera
Species		 
Taxom
 
SubfamilyTvaerenellinae
Jaanusson, 1957
2
1		Genera
Species		 
Taxom
 


Genera for America
2 Genera with 1 Species
Piretia Jaanusson, 19821SpeciesTaxom
Tvaerenella Jaanusson, 1957
0SpeciesTaxom


Species list for America
1 Species
Piretia shawi ♰ Copeland, 1982