Family
Nematotrypidae Spjeldnaes, 1984
Selection of related publications
Dzik, J. 1992. Early astogeny and relationships of the ordovician rhabdomesine bryozoans.  Acta Palaeontologica Polonica   37,   1,   37-54.
Gorjunova, R. V. 1988. Systematics of genus Revalotrypa (Bryozoa).  Paleontologicheski Zhurnal   1988,   2,   31-36.
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. 
Spjeldnaes, N. 1984. Upper Ordovician Bryozoans from Ojl Myr, Gotland, Sweden.  Bulletin of the Geological Institutions of the University of Uppsala   10,      1-66.
Rõõmusoks, A. 1970. Stratigraphy of the Viruan Series (Middle Ordovician) in Northern Estonia, I. pp. 1-346.  Valgus. 
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.
Bassler, R. S. 1911. The Early Paleozoic Bryozoa of the Baltic Provinces.  Bulletin of the US National Museum   77,      1-382.
List of species
1. Cyclophaenopora annulata Spjeldnaes, 1984 | Hirnantian
2. Cyclophaenopora minor Spjeldnaes, 1984 | Pirgu Stage
3. Cyclophaenopora robusta Spjeldnaes, 1984 | Katian
4. Kielanopora robusta Dzik, 1992 | Kukruse Stage
6. Nematotrypa indigena Gorjunova, 1985 | Keila Stage
7. Nematotrypa lauta Gorjunova, 1985 | Vormsi Stage
8. Nematotrypa spiralis Bekker, 1921 | Kukruse 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 | |
| Subfamily | Nematotrypinae | 
| Genus | Cyclophaenopora | 
| Family | Rhabdomesidae | 
| Streblotrypidae |