Subspecies
Tvaerenella longa longa (Sarv, 1956)
Synonymy list
1956     Primitiella longa sp. n. — Sarv , pp. 34, fig. 1:9-11
1957     Tvaerenella? longa (Sarv) — Jaanusson , pp. 296
1959     Tvaerenella longa longa (Sarv) — Sarv , pp. 32-33, fig. 5:13-16
1996     Tvaerenella longa longa (Sarv, 1956) — Meidla , pp. 38, fig. 5:6
Selection of related publications
Meidla, T. 1996. Late Ordovician Ostracodes of Estonia. Fossilia Baltica 2. pp. 1-222.  Tartu University Press. 
Sarv, L. 1959. Ordovician ostracodes in the Estonian S.S.R..  ENSV TA Geoloogia Instituudi Uurimused   IV,      1-210.
Sarv, L. I. 1956. New species of ostracodes of the Vasalemma Stage (Upper Ordovician of Estonia).  ENSV TA Geoloogia Instituudi Uurimused   I,      30-40.
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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 | Tvaerenella | 
| Species | longa | 
| Subspecies | longa | 
| pretiosa | 
References based on distribution
- Meidla, 1996a Orjaku borehole 135 -
- Sarv, L., 1959 Tuula
- Sarv, L., 1959 Vasalemma
- Sarv, L., 1956 Tuula