Genus
Piretia Jaanusson, 1957
Selection of related publications
Meidla, T. 1996. Late Ordovician Ostracodes of Estonia. Fossilia Baltica 2. pp. 1-222.  Tartu University Press. 
Schallreuter, R. 1985. On Piretia commasulcata Schallreuter sp. nov..  A Stereo-Atlas of Ostracod Shells. Volume 12, pp. 15-18.   British Micropalaeontological Society. 
Qvale, G. 1980. New Caradocian ostracodes from the Oslo-Asker district, Norway.  Norsk Geologisk Tidsskrift   60,   2,   93- 116.
Jaanusson, V. 1957. Middle Ordovician Ostracodes of Central and Southern Sweden.  Bulletin of the Geological Institutions of the University of Uppsala   37,   17,   173-442.
List of species
1. Piretia clypeolaria Jaanusson, 1957 | Middle Ordovician
3. Piretia curva (Steusloff, 1895) | Lasnamägi Stage
4. Piretia erinacea Schallreuter, 1964 | Keila Stage
5. Piretia geniculata Jaanusson, 1957 | Ordovician
7. Piretia rara Olempska, 1994 | Ordovician
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Arthropoda | 
| Subphylum | Crustacea | 
| Superclass | Oligostraca | 
| Class | Ostracoda | 
| Subclass | Podocopa | 
| Order | Palaeocopida | 
| Suborder | Beyrichicopina | 
| Palaeocopa | |
| Superfamily | Hollinacea | 
| Family | Tvaerenellidae | 
| Subfamily | Tvaerenellinae | 
| Genus | Duringia | 
| Euprimites | |
| Otraczetia | |
| Piretia | |
| Species | clypeolaria | 
| commasulcata | |
| curva | |
| erinacea | |
| geniculata | |
| jeuptneri | |
| rara | |
| reticulata | |
| ruchholzi | |
| rugosa | |
| speciosa | |
| tenuistriata | |
| virbalica | |
| Genus | Piretilina | 
| Retiprimites | |
| Tvaerenella | |
| Uhakiella | |
| Vendona |