Genus
Pachystrophia Perner, 1903
Selection of related publications
Rõõmusoks, A. 1970. Stratigraphy of the Viruan Series (Middle Ordovician) in Northern Estonia, I. pp. 1-346. Valgus.
Eichwald, E. 1861. Paleontologiâ Rossii. Drevnij period. II. Fauna grauvakkovoj, gornoizvestkovoj i medistoslancevatoj formacij Rossii. pp. 1-521. R. Golike (former Ya. Ionsona).
Eichwald, E. 1856. Beitrag zur geographischen Verbreitung der fossilen Thiere Russlands. Alte Periode. (Fortsetzung. S. Bulletin 1856. N 2. pag. 406.). Bulletin of the Moscow Society of Naturalists. Geological series 29, IV, 555-608.
List of species
2. Pachystrophia dilatata (Koken, 1896) | Kunda Stage
3. Pachystrophia vortex (Eichwald, 1856) | Vormsi Stage
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Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Gastropoda |
| Subclass | Eogastropoda |
| Order | Euomphalina |
| Superfamily | Euomphaloidea |
| Family | Holopeidae |
| Genus | Holopea |
| Pachystrophia | |
| Species | devexa |
| dilatata | |
| helicoides | |
| vortex |
References based on distribution
- Rõõmusoks, 1970a Aluvere quarry Jõhvi Substage
- Eichwald, 1861a
- Eichwald, 1856c Hiiumaa Island