Subfamily
Heterotrypinae Ulrich, 1890
Selection of related publications
Vinn, O., Ernst, A., Toom, U. 2017. Rare rugosan-bryozoan intergrowth from the Upper Ordovician of Estonia.  Carnets de Géologie   17,   7,   145-151. DOI:10.4267/2042/62664
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
Ernst, A., Nakrem, H. 2012. Late Ordovician (Sandbian) bryozoans and their depositional environment, Furuberget Formation, Mjøsa District, Oslo Region, Norway.  Bulletin of Geosciences   87,   1,   21-44. DOI:10.3140/bull.geosci.1316
Pushkin, V. I., Popov, L. E. 2005. Two enigmatic bryozoans from the Middle Ordovician of the East Baltic.  Palaeontology   48,   5,   1065-1074. DOI:10.1111/j.1475-4983.2005.00493.x/full
Pushkin, V. I., Nehkorosheva, L. V., Kopaevich, G. V.,  Yaroshinskaya, A. M. 1990. Pržidol'skie mšanki SSSR [Пржидольские мшанки СССР]. pp. 1-125.  Nauka. 
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. Novye vidy ordovikskih i silurijskih mšanok Brestskoj vpadiny [Новые виды ордовикских и силурийских мшанок Брестской впадины].  New species of Ordovician and Silurian Bryozoans of the Brest Depression, pp. 5-40.   Nauka i tehnika. 
Brood, K. 1974. Bryozoa from the Ludlovian of Bjärsjölagard in Skane.  GFF   96,   4,   381-388. DOI:10.1080/11035897409454291
Rõõmusoks, A. 1970. Stratigraphy of the Viruan Series (Middle Ordovician) in Northern Estonia, I. pp. 1-346.  Valgus. 
Astrova, G. G. 1965. Morfologiâ, istoriâ razvitiâ i sistema ordovikskih i silurijskih mšanok.  Transactions of the Paleontological Institute (PIN)   106,      1-432.  Nauka. 
Männil, Ralf 1961. On the morphology of the hemisphaeric zoaria of Trepostomata (Bryozoa).  ENSV TA Geoloogia Instituudi Uurimused   VI,      113-140.
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. 
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.
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. 1854. Die Grauwackenschichten von Liv- und Estland.  Bulletin de la Société Imperiale des Naturalistes de Moscou   27,   1,   1-111.
List of species
1. Dekayia perfrondosa Cumings, 1902 | Ordovician
2. Dekayia sugarensis Ross, 1969 | Sandbian
4. Heterotrypa astrovae Pushkin, 1976 | Llandovery
5. Heterotrypa compressa Brood, 1978 | Upper Ordovician
6. Heterotrypa incrustans Pushkin, 1976 | Llandovery
7. Heterotrypa inflectiformis Pushkin, 1987 | Keila Stage
11. Heterotrypa semisphaerica Pushkin, 1976 | Uhaku Stage
13. Leioclema crustulum Astrova, 1965 | Jaani Stage
14. Leioclema exilis (Pushkin, 1976) | Přidoli
17. Leioclema pulchelliforme Pushkin, 1976 | Ludlow
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Bryozoa | 
| Class | Stenolaemata | 
| Superorder | Palaeostomata | 
| Order | Trepostomata | 
| Suborder | Halloporina (suborder) | 
| Family | Monticuliporidae | 
| Subfamily | Hemieridotrypinae | 
| Heterotrypinae | |
| Genus | Dannunziopora | 
| Dekayella | |
| Dekayia | |
| Eichwaldopora | |
| Heterotrypa | |
| Leioclema | |
| Lioclemella | |
| Stigmatella | |
| Subfamily | Monticuliporinae | 
| Genus | Toomipora |