Genus

Hemiphragma Ulrich, 1893

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

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.

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). 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.

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.

Dybowski, W. 1877. Die Chaetetiden der ostbaltischen Silur-formation. pp. 1-134.

List of species

1. Hemiphragma batheri Bassler, 1911 | Katian

2. Hemiphragma convexa (Górka, 1969) | Ordovician

3. Hemiphragma insolitum Koromyslova et Fedorov, 2020 | Dapingian→Darriwilian

4. Hemiphragma irrasum (Ulrich, 1886) | Kunda Stage→Idavere Substage

5. Hemiphragma ottawaense (Foord, 1883) | Kunda Stage

6. Hemiphragma panderi (Dybowski, 1877) | Kukruse Stage→Oandu Stage

7. Hemiphragma priscum Pushkin, 1999 | Billingen Stage

8. Hemiphragma pygmaeum Bassler, 1911 | Kukruse Stage

9. Hemiphragma rotundatum Bassler, 1911 | Volkhov Stage→Kukruse Stage

10. Hemiphragma subirrasum Männil et Pushkin, 1987 | Kunda Stage

11. Hemiphragma tenuimurale Ulrich, 1893 | Keila Stage→Rakvere Stage

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Bryozoa
Class	Stenolaemata
Superorder	Palaeostomata
Order	Trepostomata
Suborder	Halloporina (suborder)
Family	Dittoporidae
Genus	Balticoporella
	Dittopora
	Hemiphragma
Species	batheri
	convexa
	insolitum
	irrasum
	ottawaense
	panderi
	priscum
	pygmaeum
	rotundatum
	subirrasum
	tenuimurale
Genus	Phragmoporella

References based on distribution

Ernst & Nakrem, 2011 Lower Ordovician