Species
Nematotrypa spiralis Bekker, 1921
Synonymy list
1921     Nematotrypa spiralis, sp. n. — Bekker , pp. 57, fig. VII 32-37
1952     Nematotrypa spiralis Bekker, 1921 — Toots , pp. 131, fig. 11:1-3
1985     Nematotrypa spiralis Bekker, 1921 — Gorjunova , pp. 95
Selection of related publications
Männil, R. M. 1959. Questions of stratigraphy and bryozoans of the Ordovician of Estonia. pp. 1-852.  Institut Geologii Akademii Nauk Estonskoi SSR. 
Bekker, H. 1921. The Kuckers stage of the Ordovician Rocks in NE Estonia.  Acta et Commentationes Universitatis Tartuensis   II,   1,   1-92.
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Bryozoa | 
| Class | Stenolaemata | 
| Superorder | Palaeostomata | 
| Order | Cryptostomata | 
| Suborder | Rhabdomesida | 
| Superfamily | Rhabdomesina | 
| Family | Nematotrypidae | 
| Subfamily | Nematotrypinae | 
| Genus | Nematotrypa | 
| Species | gracilis | 
| indigena | |
| lauta | |
| spiralis | 
References based on distribution
- Bekker, 1921a Kohtla-Järve Kukruse Stage
- Toots, 1952a Käva mine Kukruse Stage