Subgenus
Piretopsis (Protallinnella) Jaanusson, 1957
Selection of related publications
Tolmacheva, T., Egerquist, E., Meidla, T., Tinn, O., Holmer, L. 2003. Faunal composition and dynamics in unconsolidated sediments: a case study from the Middle Ordovician of the East Baltic.  Geological Magazine   140,   1,   31-44. DOI:10.1017/S001675680200701X
Ivanova, V. A. 1979. Ostrakody rannego i srednego ordovika. Podotrâd Hollinomorpha.  Transactions of the Paleontological Institute (PIN)   172,      1-216.  Nauka. 
Sarv, L. I. 1963. New ostracodes from the Ordovician of East Baltic.  ENSV TA Geoloogia Instituudi Uurimused   XIII,      161-188.
Sarv, L. 1959. Ordovician ostracodes in the Estonian S.S.R..  ENSV TA Geoloogia Instituudi Uurimused   IV,      1-210.
Öpik, A. 1935. Ostracoda from the lower Ordovician Megalaspis-limestone of Estonia and Russia.  Tartu Ülikooli Geoloogia Instituudi Toimetused   44,      1-12.
List of species
2. Piretopsis (Protallinnella) loennaensis Sarv, 1963 | Volkhov Stage
3. Piretopsis (Protallinnella) peridonea (Sarv, 1963) | Volkhov Stage
4. Piretopsis (Protallinnella) quadricostata Sarv, 1963 | Kunda Stage
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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 | |
| Family | Ctenonotellidae | 
| Genus | Piretopsis | 
| Subgenus | (Protallinnella) | 
| Species | grewingkii | 
| loennaensis | |
| peridonea | |
| quadricostata | |
| tricostata | |
| donsi |