Family
Dittoporidae Vinassa de Regny, 1921
Selection of related publications
Ernst, A. 2022. Bryozoan fauna from the Kunda Stage (Darriwilian, Middle Ordovician) of Estonia and NW Russia.  Bulletin of Geosciences   97,   1,   33–68. DOI:10.3140/bull.geosci.1843
Koromyslova, A. V., Fedorov, P. V. 2021. The oldest bifoliate cystoporate and two other bryozoan taxa from the Dapingian (Middle Ordovician) of north-western Russia.  Journal of Paleontology   95,   1,   24-39. DOI:10.1017/jpa.2020.73
Ernst, A., Nakrem, H. A. 2011. Stenolaemate bryozoans from the Mjøsa Formation (Late Ordovician, Katian) of Helgøya (Mjøsa), southern Norway.  Norwegian Journal of Geology   91,   3,   163-180.
Koromyslova, A. V. 2011. Bryozoans of the Latorp and Volkhov horizons (Lower-Middle Ordovician) of the Leningrad Region.  Paleontological Journal   45,   8,   887-980. DOI:10.1134/S0031030111080028
Koromyslova, A. V., Fedorov, P. V., Ershova, V. B. 2009. New records of bryozoans from the Lower Ordovician of the Leningrad Region and intercolonial variability in Esthoniopora lessnikowae (Modzalevskaya).  Paleontological Journal   43,   2,   153-161. DOI:10.1134/S0031030109020051
Pushkin, V. I., Popov, L. E. 1999. Early Ordovician bryozoans from north-western Russia.  Palaeontology   42,   1,   171-189. DOI:10.1111/1475-4983.00067
Gorjunova, R. V. 1996. Phylogeny of the Paleozoic bryozoans.  Transactions of the Paleontological Institute (PIN)   267,      1-163.  Nauka. 
Gorjunova, R. V. 1992. Morphology and system of Paleozoic bryozoans.  Transactions of the Paleontological Institute (PIN)   251,      1-152.  Nauka. 
Pushkin, V. I. 1987. Ordovikskie mšanki podotrâda Halloporina Belorussii i smežnyh rajonov Vostočno- Evropejskoj platformy.  Ordovik Belorussii, pp. 145-232.   Nauka i Tehnika. 
Modzalevskaya, E. A. 1986. Bryozoa of the family Dittoporidae from Ordovician of Leningrad area.  Ežegodnik Vsesoûznogo Paleontologičeskogo Obŝestva   XXX,      74-91.
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. 
Astrova, G. G. 1978. Istoriâ razvitiâ, sistema i filogeniâ mšanok otrâda Trepostomata.  Transactions of the Paleontological Institute (PIN)   169,      1-240.  Nauka. 
Pushkin, V. I. 1977. O sistematičeskom položenii i sostave roda Dittopora (Bryozoa).  Transactions of the Museum of earth-study of Moscow University         97-113.
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.
Eichwald, E. 1861. Paleontologiâ Rossii. Drevnij period. II. Fauna grauvakkovoj, gornoizvestkovoj i medistoslancevatoj formacij Rossii. pp. 1-521.  R. Golike (former Ya. Ionsona). 
List of species
5. Dittopora lamellata Pushkin, 1977 | Rakvere Stage
6. Dittopora ramosa Modzalevskaya, 1953 | Volkhov Stage
8. Hemiphragma batheri Bassler, 1911 | Katian
9. Hemiphragma convexa (Górka, 1969) | Ordovician
12. Hemiphragma ottawaense (Foord, 1883) | Kunda Stage
14. Hemiphragma priscum Pushkin, 1999 | Billingen Stage
15. Hemiphragma pygmaeum Bassler, 1911 | Kukruse Stage
17. Hemiphragma subirrasum Männil et Pushkin, 1987 | Kunda Stage
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Bryozoa | 
| Class | Stenolaemata | 
| Superorder | Palaeostomata | 
| Order | Trepostomata | 
| Suborder | Halloporina (suborder) | 
| Family | Bimuroporidae | 
| Capillaporidae | |
| Dittoporidae | |
| Genus | Balticoporella | 
| Dittopora | |
| Hemiphragma | |
| Phragmoporella | |
| Family | Halloporidae | 
| Mesotrypidae | |
| Monticuliporidae | |
| Phragmoporidae | |
| Ralfimartitidae | |
| Trematoporidae |