Genus

Heterotrypa Nicholson, 1879

Selection of related publications
Ernst, A., Nakrem, H. 2015. Bryozoans from the lower Silurian (Wenlock) Steinsfjorden Formation of Ringerike, southern Norway. Bulletin of Geosciences 90, 1, 65-87. DOI:10.3140/bull.geosci.1521
Pushkin, V. I. 1987. Ordovikskie mšanki podotrâda Halloporina Belorussii i smežnyh rajonov Vostočno- Evropejskoj platformy. Ordovik Belorussii, pp. 145-232. Nauka i Tehnika.
Brood, K. 1980. Upper Ordovician bryozoa from Dalmantina beds of Kinnekulle, Sweden. GFF 102, 1, 27-35. DOI:10.1080/11035898009448587
Pushkin, V. I. 1976. On the genus Anaphragma (Bryozoa). Paleontologicheski Zhurnal 3, 51-57.
Pushkin, V. I. 1976. Novye vidy ordovikskih i silurijskih mšanok Brestskoj vpadiny. Novye vidy iskopaemyh životnyh i rastenij Belorussii, pp. 3-40. Nauka i tehnika.
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.
Modzalevskaya, E. A. 1953. Trepostomaty ordovika Pribaltiki i ih stratigraficheskoe znachenie. Trudy Vsesoûznogo Naučno-Issledovatel'skogo Geologo-Razvedočnogo Instituta (VNIGRI) 91-167. Gostoptehizdat.
Bassler, R. S. 1911. The Early Paleozoic Bryozoa of the Baltic Provinces. Bulletin of the US National Museum 77, 1-382.
List of species
2. Heterotrypa compressa Brood, 1978 | Upper Ordovician
5. Heterotrypa obscura (Ulrich, 1882) | Rakvere StageNabala Stage
6. Heterotrypa praenuntia (Ulrich, 1893) | Kukruse StageRakvere Stage
9. Heterotrypa undata Pushkin, 1987 | Jõhvi SubstageKeila Stage