Family
Streblotrypidae Ulrich, 1890
Selection of related publications
Gorjunova, R. V. 1985. Morfologiâ, sistema i filogeniâ mšanok (otrâd Rhabdomesida) [Морфология, система и филогения мшанок (отряд Rhabdomesida)].  Transactions of the Paleontological Institute (PIN)      208,   1-152.  Nauka. 
Männil, R. M. 1959. Questions of stratigraphy and bryozoans of the Ordovician of Estonia. pp. 1-852.  Institut Geologii Akademii Nauk Estonskoi SSR. 
List of species
2. Helopora macropora Toots, 1952 | Kukruse Stage
3. Helopora optima Gorjunova, 1985 | Juuru Stage
4. Helopora restricta Gorjunova, 1985 | Juuru Stage
5. Helopora vadosa Gorjunova, 1985 | Oandu Stage
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Bryozoa | 
| Class | Stenolaemata | 
| Superorder | Palaeostomata | 
| Order | Cryptostomata | 
| Suborder | Rhabdomesida | 
| Superfamily | Rhabdomesina | 
| Family | Arthrostylidae | 
| Nematotrypidae | |
| Rhabdomesidae | |
| Streblotrypidae | |
| Subfamily | Heloporinae | 
| Streblotrypinae |