Phylum
Brachiopoda Duméril, 1806
Brachiopods (lamp shells)
Selection of related publications
Popov, L. E., Holmer, L. E., Hints, L., Ghobadi Pour, M., Zuykov, M. 2025. Pseudopholidops – the earliest craniopside (Brachiopoda, Craniiformea): an extinction survivor.  Australasian Palaeontological Memoirs   57,      1-20.
Vinn, O., Madison, A., Isakar, M., El Hedeny, M., Alkahtane, A. A., Alfarraj, S. 2025. A new modern Hydrolithon-like coralline red alga from the Upper Ordovician of Estonia.  Proceedings of the Geologists' Association         101127. DOI:10.1016/j.pgeola.2025.101127
Hints, L. 2024. Taxonomy of the Sandbian (Upper Ordovician) brachiopod Dalmanella kegelensis Alichova, 1953 and the new genus Alichovella.  Estonian Journal of Earth Sciences   73,   1,   45-56. DOI:10.3176/earth.2024.06
Vinn, O., Isakar, M., Almansour, M. I., Farraj, S. A., Hedeny, M. E. 2024. Syn vivo encrustation of Porambonites Pander, 1830 (Brachiopoda) by craniid brachiopods in the Late Ordovician of Estonia.  Acta Geologica Polonica   74,   2,   e19. DOI:10.24425/agp.2024.150012
Vinn, O., Holmer, L. E., Wilson, M. A. 2024. Evolution of brachiopod symbiosis in the early Paleozoic.  Historical Biology   36,   7,   1274-1294. DOI:10.1080/08912963.2023.2212368
Vinn, O., Ernst, A., Isakar, M., El-Hedeny, I Almansour, M., Al Farraj, S. 2024. Cryptic fauna in abandoned bivalve shells and taphonomy of bivalve steinkerns in the Late Ordovician of Baltica.  Historical Biology         1-6. DOI:10.1080/08912963.2024.2383702
Hints, L., Rong, J. 2024. Discovery of trimerellide brachiopod Gasconsia from the Ordovician of Estonia.  Estonian Journal of Earth Sciences   73,   2,   124-133. DOI:10.3176/earth.2024.12
Komarov, V. N., Volkova, E. A., Kachalina, M. D. 2023. O nahodkah kraniid (Brahiopoda) na rakovinah venlokskih rinhonellid na o. Saaremaa (Èstoniâ) [О находках краниид (Брахиопода) на раковинах венлокских ринхонеллид на о. Сааремаа (Эстония)].  Bio-i geosobytiâ v istorii Zemli. Ètapnost' èvolûcii i stratigrafičeskaâ korrelâciâ. LXIX sessiâ paleontologičeskogo obŝestva, pp. 62-63.   Kartafabrika VSEGEI. 
Vinn, O., Holmer, L. E., Wilson, M. A., Isakar, M., Toom, U. 2023. A Rowellella (Lingulata, Brachiopoda) nestler in a Trypanites boring from the Middle Ordovician of Estonia: An early colonizer of hard substrate borings.  Palaios   38,   5,   240-245. DOI:10.2110/palo.2023.003
Baarli, B. G. 2022. The smooth, spire-bearing brachiopods after the terminal Ordovician extinction through lower Llandovery in the central Oslo region, Norway.  Journal of Paleontology   96,   1,   81-111. DOI:10.1017/jpa.2021.72
Vinn, O., Wilson, M., Holmer, L. E., Ernst, A., Tinn, O., Toom, U. 2022. Diverse endobiotic symbiont fauna from the late Katian (Late Ordovician) of Estonia.  Palaeontologia Electronica   25,   3,   1-13. DOI:10.26879/1232
Baarli, B. G. 2021. Survival and recovery atrypid fauna following the terminal Ordovician extinction, the Atrypinae: central Oslo Region, Norway.  Historical Biology   33,   3,   403-440. DOI:10.1080/08912963.2019.1620228
Baarli, B. G. 2021. Plectatrypinae and other ribbed atrypides succeeding the end Ordovician extinction event, Central Oslo Region, Norway.  Journal of Paleontology   95,   1,   75-105. DOI:10.1017/jpa.2020.69
Vinn, O., Holmer, L. E., Wilson, M. A., Isakar, M., Toom, U. 2021. Possible drill holes and pseudoborings in obolid shells from the Cambrian/Ordovician boundary beds of Estonia and the uppermost Cambrian of NW Russia.  Historical Biology   33,   12,   3579–3584. DOI:10.1080/08912963.2021.1878355
Toom, U., Vinn, O., Isakar, M., Madison, A., Hints, O. 2020. Small faecal pellets in Ordovician shelly fossils from Estonia, Baltoscandia.  Estonian Journal of Earth Sciences   69,   1,   1-19. DOI:10.3176/earth.2020.01
Balthasar, U., Jin, J., Hints, L., Cusack, M. 2020. Brachiopod shell thickness links environment and evolution.  Palaeontology   63,   1,   171-183. DOI:10.1111/pala.12450
Holmer, L. E., Yue, L., Zhang, Z., Zhang, Z. 2019. The problematic lingulate brachiopod Aulonotreta from the Ordovician (Dapingian–Darriwilian) of Baltoscandia.  Estonian Journal of Earth Sciences   68,   4,   206-224. DOI:10.3176/earth.2019.15
Hints, L. 2019. The Ordovician brachiopod genus Cyrtonotella: taxonomy and distribution in the Baltic Basin.  Estonian Journal of Earth Sciences   68,   3,   147-159. DOI:10.3176/earth.2019.10
Madison, A. A. 2019. Shell Microstructure of Strophomenide Bilobia Cooper (Brachiopoda) from the Late Ordovician of Baltoscandia.  Paleontological Journal   53,   1,   30-43. DOI:10.1134/S0031030119010052
Holmer, L. E., Zhang, Z., Topper, T. P., Popov, L., Claybourn, T. M. 2018. The attachment strategies of Cambrian kutorginate brachiopods: the curious case of two pedicle openings and their phylogenetic significance.  Journal of Paleontology   92,   1,   33-39. DOI:10.1017/jpa.2017.76
Harper, D. A. T., Popov, L. E., Holmer, L. E. 2017. Brachiopods: origin and early history.  Palaeontology   60,   5,   609-631. DOI:10.1111/pala.12307
Holmer, L. E., Popov, L. E., Ghobadi Pour, M., Zhang, Z., Zhang, Z. 2017. Unusual pitted Ordovician brachiopods from the East Baltic: the significance of coarsely pitted ornamentations in linguliforms.  Papers in Palaeontology   3,   3,   387-399.  Wiley.  DOI:10.1002/spp2.1080
Jin, J., Holmer, L. E. 2017. Pentameroid brachiopod Karlsorus new genus from the upper Wenlock (Silurian) Slite Beds, Gotland, Sweden.  Journal of Paleontology   91,   5,   911-918. DOI:10.1017/jpa.2017.46
Madison, A. 2017. To the revision of the Upper Ordovician Bilobia Cooper (Strophomenida, Brachiopoda).  Paleontological Journal   51,   4,   368-373. DOI:10.1134/S0031030117040062
Hints, L., Paškevičius, J., Martma, T., Männik, P., Nõlvak, J. 2016. Upper Sandbian–lower Katian bio- and chemostratigraphy in the Pajevonys-13 core section, Lithuania.  Estonian Journal of Earth Sciences   65,   2,   85-97. DOI:10.3176/earth.2016.08
Ushatinskaya, G. T., Korovnikov, I. V. 2016. Revision of the Superfamily Acrotheloidea (Brachiopoda, Class Linguliformea, Order Lingulida) from the Lower and Middle Cambrian of the Siberian Platform.  Paleontological Journal   50,   5,   450-462. DOI:10.1134/S0031030116050130
Huang, B., Baarli, B .G., Zhan, R. B., Rong, J. Y. 2016. A new early Silurian brachiopod genus, Thulatrypa, from Norway and South China, and its palaeobiogeographical significance.  Alcheringa: An Australasian Journal of Palaeontology   40,   1,   83-97. DOI:10.1080/03115518.2016.1092066
Jarochowska, E., Hierl, F., Vinn, O., Munnecke, A. 2016. Reducing taxonomic noise in problematic fossils: revision of the incertae sedis genus Allonema based on shape analysis.  Bulletin of Geosciences   91,   1,   97-110. DOI:10.3140/bull.geosci.1588
Paškevičius, J., Hints, L. 2016. New Early Katian species of Leptestiidae and Hesperorthidae (Brachiopoda) from Lithuania.  Estonian Journal of Earth Sciences   65,   2,   75-84. DOI:10.3176/earth.2016.05
Lang, L., Kirsimäe, K., Vahur, S. 2016. Diagenetic fate of bioapatite in linguliform brachiopods: multiple apatite phases in shells of Cambrian lingulate brachiopod Ungula ingrica  (Eichwald).  Lethaia   49,   1,   13-27.  Wiley.  DOI:10.1111/let.12127
Butler, A. D., Streng, M., Holmer, L. E., Babcock, L. E. 2015. Exceptionally preserved Mickwitzia from the Indian Springs Lagerstätte (Cambrian Stage 3), Nevada.  Journal of Paleontology   89,   6,   933-955. DOI:10.1017/jpa.2016.8
Hints, L., Harper, D. A. T. 2015. The Hirnantian (Late Ordovician) brachiopod fauna of the East Baltic: Taxonomy of the key species.  Acta Palaeontologica Polonica   60,   2,   395-420. DOI:10.4202/app.2013.0010
Lang, L. 2015. Baculate shell structure in Early Palaeozoic linguliform brachiopods.  Dissertationes Geologicae Universitatis Tartuensis   40,      1-113.  University of Tartu Press. 
Hints, L. 2014. Revision of the concept of the orthide brachiopod Cyrtonotella in the Middle Ordovician of the East Baltic.  Estonian Journal of Earth Sciences   63,   2,   63-70. DOI:10.3176/earth.2014.05
Vinn, O., Wilson, M. A., Toom, U. 2014. Earliest rhynchonelliform brachiopod parasite from the Late Ordovician of northern Estonia (Baltica).  Palaeogeography, Palaeoclimatology, Palaeoecology   411,      42-45. DOI:10.1016/j.palaeo.2014.06.028
Madison, A. A. 2013. New Brachiopod Subfamily Anechophragmiinae (Strophomenida) from the Ordovician of the Leningrad Region.  Paleontological Journal   47,   1,   23-37. DOI:10.1134/S0031030113010061
Holmer, L. E., Popov, L., Bassett, M. G. 2013. Silurian Craniide Brachiopoda from Gotland.  Palaeontology   56,   5,   1029-1044. DOI:10.1111/pala.12033
Lang, L., Puura, I. 2013. Phosphatized organic nanostructures in the Cambrian linguloid brachiopod Ungula inornata (Mickwitz).  Estonian Journal of Earth Sciences   62,   3,   121-130. DOI:10.3176/earth.2013.10
Hints, L., Popov, L., Holmer, L. E. 2013. Morphology, ontogeny and affinities of the Hirnantian triplisiid brachiopod Streptis undifera from Baltoscandia.  Palaeontology   56,   5,   961-970. DOI:10.1111/pala.12028
Vinn, O. 2013. Cornulitid tubeforms from the Ordovician of Eastern Baltic.  Carnets de Géologie      03,   131-138.
Hints, L. 2012. New Hirnantian orthide brachiopods from the type section of the Porkuni Stage (Porkuni quarry, northeastern Estonia).  Estonian Journal of Earth Sciences   61,   4,   227–241. DOI:10.3176/earth.2012.4.04
Madison, A. A. 2012. Formation of Cardinal Process in Ordovician Strophomenids.  Paleontological Journal   46,   12,   1362-1374. DOI:10.1134/S0031030112120039
Popov, L. E., Basset, M. G., Holmer, L. E. 2012. Earliest ontogeny of Early Palaeozoic Craniiformea: compelling evidence for lecithotrophy.  Lethaia   45,   4,   566-573. DOI:10.1111/j.1502-3931.2012.00315.x
Hints, L., Pärnaste, H., Gailite, L.-I. 2012. Hirnantia sagittifera (Brachiopoda) and Mucronaspis mucronata s.l. (Trilobita) in the Upper Ordovician of the East Baltic: taxonomy and distribution.  Estonian Journal of Earth Sciences   61,   2,   65-81. DOI:10.3176/earth.2012.2.01
Nestor, V. 2012. A summary and revision of the East Baltic Silurian chitinozoan biozonation.  Estonian Journal of Earth Sciences   61,   4,   242-260. DOI:10.3176/earth.2012.4.05
Rubel, M. 2011. Silurian brachiopods Dictyonellida, Strophomenida, Productida, Orthotetida, Protorthida and Orthida from Estonia.  Fossilia Baltica 4, pp. 1-133.   Tartu Ülikooli geoloogia instituut. 
Hoel, O. A. 2011. Strophomenidae, Leptostrophiidae, Strophodontidae and Shaleriidae (Brachiopoda, Strophomenida) from the Silurian of Gotland, Sweden.  Paläontologische Zeitschrift   85,   2,   201-229. DOI:10.1007/s12542-010-0088-3
Lang, L., Uibopuu, E., Puura, I. 2011. Nanostructures in Palaeozoic linguloid brachiopods.  Memoirs of the Association of Australasian Palaeontologists   41,      359−366.
Madison A. A., Rubel, M. 2010. Family Lycophoriidae (Brachiopoda) from the Ordovician of Baltoscandia.  Paleontological Journal   44,   2,   14-23. DOI:10.1134/S0031030110020048
Hints, L. 2010. A new glyptorthid species (Brachiopoda: Orthida) from the Upper Ordovician of Estonia.  Estonian Journal of Earth Sciences   59,   3,   189-194. DOI:10.3176/earth.2010.3.01
Lang, L., Puura, I. 2009. Systematic position, distribution, and shell structure of the Devonian linguloid brachiopod Bicarinatina bicarinata (Kutorga, 1837).  Estonian Journal of Earth Sciences   58,   1,   63-70. DOI:10.3176/earth.2009.1.06
Hints, L., Harper, D. A. T. 2008. The brachiopods Alwynella and Grorudia: homeomorphic plectambonitoids in the Middle and Upper Ordovician of Baltoscandia.  Earth and Environmental Science Transactions of the Royal Society of Edinburgh   98,   3-4,   271-280. DOI:10.1017/S1755691007080358
Zuykov, M. A., Butts, S. H. 2008. Glyptorthis (Foerste, 1914) and Bassettella new genus (Brachiopoda: Orthida) from the Late Ordovician of the East Baltic.  Journal of Paleontology   82,   1,   197-200. DOI:10.1666/06-068.1
Zuykov, M. A., Terentiev, S. S., Harper, D. A. T. 2008. New endemic brachiopod and echinoderm genera from the Upper Ordovician of the St. Petersburg region, nortwestern Russia.  GFF   130,   2,   87-93. DOI:10.1080/11035890801302087
Jin, J., Zhan, R. 2008. Late Ordovician Orthide and Billingsellide Brachiopods from Anticosti Island, Eastern Canada: Diversity Change through Mass Extinction. pp. 1-160.  NRC Research Press. 
Kaljo, D., Hints, L., Männik, P., Nõlvak, J. 2008. The succession of Hirnantian events based on data from Baltica: brachiopods, chitinozoans, conodonts, and carbon isotopes.  Estonian Journal of Earth Sciences   57,   4,   197-218. DOI:10.3176/earth.2008.4.01
Wright, A. D., Rong, J.-Y. 2007. Co-existence of interarea and palintrope: contribution of a new pentameride brachiopod from the Upper Ordovician of Sweden.  Earth and Environmental Science Transactions of the Royal Society of Edinburgh   98,   3-4,   263-269. DOI:10.1017/S1755691007080395
Hints, L., Hints, O., Nemliher, R., Nõlvak, J. 2007. Hulterstad brachiopods and associated faunas in the Vormsi Stage (Upper Ordovician, Katian) of the Lelle core, Central Estonia.  Estonian Journal of Earth Sciences   56,   3,   131-142.
Zuykov, M. A., Harper, D. A. T. 2007. Platystrophia (Orthida) and new related Ordovician and Early Silurian brachiopod genera.  Estonian Journal of Earth Sciences   56,   1,   11-34.
Egerquist, E., Holmer, L. E. 2006. Early-Middle Ordovician (Billingen- Volkhov stages) Orthide and Protorthide brachiopods from the East Baltic.  GFF   128,   4,   339-348. DOI:10.1080/11035890601284339
Thomsen, E., Jin., J., Harper, D. A. T. 2006. Early Silurian brachiopods (Rhynchonellata) from the Sælabonn Formation of the Ringerike district, Norway.  Bulletin of the Geological Society of Denmark   53,      111-126. DOI:10.37570/bgsd-2006-53-06
Cocks, L. R. M. 2005. Strophomenate Brachiopods from the late Ordovician Boda Limestone of Sweden: their systematics and implications for palaeogeography.  Journal of Systematic Palaeontology   30,   3,   243-282. DOI:10.1017/S1477201905001616
Popov, L. E., Egerquist, E., Zuykov, M. A. 2005. Ordovician (Arenig–Caradoc) Syntrophiidine brachiopods from the East Baltic region.  Palaeontology   48,   4,   739-761. DOI:10.1111/j.1475-4983.2005.00487.x
Zuykov, M. A., Egerquist, E. 2005. A new Platystrophia-like brachiopod genus from the Ordovician Boda Limestone of Dalarna, Sweden. pp. 1-5. DOI:10.1080/11035890501271001
Percival, I. G., Wright, A. J. 2005. A New Early Silurian Species of Trimerella (Brachiopoda: Craniata) from the Orange District, New South Wales.  Proceedings of the Linnean Society of New South Wales         111-120.
Hoel, O. A. 2005. Silurian Leptaeninae (Brachiopoda) of Gotland, Sweden.  Paläontologische Zeitschrift   79,   2,   263-284. DOI:10.1007/BF02990188
Vinn, O. 2005. The distribution of worm borings in brachiopod shells from the Caradoc Oil Shale of Estonia.  Carnets de Géologie   5,   article 3,   1-11. DOI:10.4267/2042/2454
Rõõmusoks, A. 2004. Ordovician strophomenoid brachiopods of northern Estonia.  Fossilia Baltica 3, pp. 1-151.   Tartu Ülikooli geoloogia Instituut. 
Nemliher, J., Kurvits, T., Kallaste, T., Puura, I. 2004. Apatite varieties in the shell of the Cambrian lingulate brachiopod Obolus apollinis Eichwald.  Proceedings of the Estonian Academy of Sciences. Geology   53,   4,   246-256. DOI:10.3176/geol.2004.4.02
Musteikis, P., Cocks, L. R. M. 2004. Strophomenide and orthotetide Silurian brachiopods from the Baltic region, with particular reference to Lithuanian boreholes.  Acta Palaeontologica Polonica   49,   3,   455-482.
Copper, P. 2004. Silurian (Late Llandovery-Ludlow) Atrypid Brachiopods from Gotland, Sweden, and Welsh Borderlands, Great Britain. pp. 1-219. DOI:10.1139/9780660190112
Hints, L. 2004. Maximizing diductor adhension: An unusual cardinal process in Late Ordovician brachiopods from Estonia.  Acta Palaeontologica Polonica   49,   4,   635-638.
Vinn, O. 2004. The earliest known Trypanites borings in the shells of articulate brachiopods from the Arenig (Ordovician) of Baltica.  Proceedings of the Estonian Academy of Sciences. Geology   53,   4,   257-266. DOI:10.3176/geol.2004.4.03
Popov, L. E., Holmer, L. E. 2003. Understanding linguloid brachiopods: Obolus and Ungula as examples.  Carnets de Géologie      6,   1-13.
Tolmacheva, T., Egerquist, E., Meidla, T., Tinn, O., Holmer, L. 2003. Faunal composition and dynamics in unconsolidated sediments: a case study from the Middle Ordovician of the East Baltic.  Geological Magazine   140,   1,   31-44. DOI:10.1017/S001675680200701X
Zuykov, M., Hints, L. 2002. New species of Estlandia (Clitambonitidina, Brachiopoda) in the Upper Ordovician of the East Baltic.  Proceedings of the Estonian Academy of Sciences. Geology   51,   3,   135-142. DOI:10.3176/geol.2002.3.01
Musteikis, P., Modzalevskaya, T. L. 2002. Some Silurian brachiopods from Lithuania and their palaeobiogeographical significance.  Palaeontology   45,   3,   595–626. DOI:10.1111/1475-4983.00251
Holmer, L. E., Biernat, G. 2002. Lingulate brachiopods from Lower Ordovician (Tremadoc) chalcedonites, Holy Cross Mountains, Poland.  Acta Palaeontologica Polonica   47,   1,   141-156.
Vinn, O. 2001. A new subspecies of the clitambonitidine brachiopod Estlandia catellatus from the Middle Ordovician of Osmussaar Island, Estonia.  Proceedings of the Estonian Academy of Sciences. Geology   50,   2,   86-94. DOI:10.3176/geol.2001.2.02
Holmer, L. E.,  Popov, L. E. 2000. Class Lingulata.  Treatise on Invertebrate Paleontology, part H Brachiopoda, pp. 30-146. 
Hints, L., Oraspõld, A., Kaljo, D. 2000. Stratotype of the Porkuni Stage with comments on the Röa Member (uppermost Ordovician, Estonia).  Proceedings of the Estonian Academy of Sciences. Geology   49,   3,   177-199. DOI:10.3176/geol.2000.3.02
Rubel, M., Wright, A. D. 2000. Clitambonitidina.  Treatise on Invertebrate Paleontology, part H, Brachiopoda, Revised, Volume 3, pp. 692-708. 
Popov, L. E., Holmer, L. E. 2000. Craniopsida.  Treatise on Invertebrate Paleontology, part H Brachiopoda, pp. 164-168. 
Popov, L. E., Holmer, L. E. 2000. Trimerellida.  Treatise on Invertebrate Paleontology, part H (Revised) Brachiopoda, pp. 184-192. 
Modzalevskaya, T. L., Rubel, M. 2000. Revision of the Silurian brachiopod Pentamerus samojedicus Keyserling, 1846 from the Timan Ridge, Russia.  Proceedings of the Estonian Academy of Sciences. Geology   49,   2,   147-156. DOI:10.3176/geol.2000.2.06
Vinn, O., Rubel, M. 2000. The spondylium and related structures in the clitambonitidine brachiopods.  Journal of Paleontology   74,   3,   439-443. DOI:10.1017/S002233600003170X
Kaesler,  R. L. (ed) 2000. Treatise on Invertebrate Paleontology. Part H. Brachiopoda, Revised. Volume 2: Linguliformea, Craniiformea, and Rhynchonelliformea (part). pp. 1-423.  University of Kansas Paleontological Institute. 
Tinn, O. 1998. The Ordovician clitambonitidine brachiopod genus Vellamo in Estonia.  Proceedings of the Estonian Academy of Sciences. Geology   47,   3,   195-216. DOI:10.3176/geol.1998.3.05
Puura, I. 1996. Lingulate brachiopods and biostratigraphy of the Cambrian-Ordovician boundary beds in Baltoscandia.  Doctoral Thesis, pp. 1-214.   Uppsala University. 
Holmer, L. E., Popov, L. E. 1994. Revision of the type species of Acrotreta and related Lingulate brachiopods.  Journal of Paleontology   68,   3,   433-450. DOI:10.1017/S002233600002583X
Popov, L., Holmer, L. E. 1994. Cambrian-Ordovician lingulate brachiopods from Scandinavia, Kazakhstan, and South Ural Mountains.  Fossils and Strata   35,      1-156. DOI:10.1111/j.1502-3931.1994.tb01571.x
Popov L., Nõlvak J., Holmer, L. 1994. Late Ordovician lingulate brachiopods from Estonia.  Palaeontology   37,   3,   627-650.
Rõõmusoks, A. 1993. Four new brachiopod genera of the subfamily Oepikinae (Strophomenacea) from the Ordovician of Estonia.  Proceedings of the Estonian Academy of Sciences. Geology   42,   2,   48-57. DOI:10.3176/geol.1993.2.02
Rõõmusoks, A. 1993. Some brachiopod genera of the subfamily Strophomeninae from the Ordovician of Estonia.  Proceedings of the Estonian Academy of Sciences. Geology   42,   3,   110-117. DOI:10.3176/geol.1993.3.02
Rõõmusoks, A. 1993. A review of Estonian Ordovician rafinesquinids (Brachiopoda, Strophomenacea).  Proceedings of the Estonian Academy of Sciences. Geology   42,   4,   160-166. DOI:10.3176/geol.1993.4.03
Andreev, D. A. 1993. New Ordovician Plectambonitacean brachiopods from Tuva and Leningrad oblast.  Paleontologicheski Zhurnal      2,   50-55.
Wright, A. D. 1993. Subdivision of the lower Palaeozoic articulate brachiopod family Triplesiidae.  Palaeontology   36,   2,   481-493.
Hints, L. 1993. Holorhynchus (Pentamerida, Brachiopoda) in the Upper Ordovician of Estonia.  Proceedings of the Estonian Academy of Sciences. Geology   42,   3,   118-123. DOI:10.3176/geol.1993.3.03
Jaanusson, V., Bassett, M. G. 1993. Orthambonites and related Ordovician brachiopod genera.  Palaeontology   36,   1,   21-63.
List of species
2. Acanthambonia delicata Holmer, 1989 | Ordovician
3. Acanthambonia ildjernensis Hansen, 2008 | Ordovician
5. Acanthocrania hemipustulosa (Huene, 1899) | Middle Ordovician
6. Acanthocrania papillifera (Roemer, 1861) | Ordovician
7. Acrothele coriacea Linnarsson, 1876 | Lower Cambrian (old nomenclature)→Upper Cambrian (old nomenclature)
9. Acrotreta conula Walcott, 1902 | Upper Cambrian (old nomenclature)
12. Acrotreta tallinnensis Holmer et Popov, 1994 | Saka Member
13. Actinomena orta Öpik, 1930 | Kukruse Stage
14. Aegiria norvegica Öpik, 1933 | Raikküla Stage
15. Ahtiella arenaria Öpik, 1933 | Kunda Stage
16. Ahtiella baltica Öpik, 1932 | Kunda Stage
17. Ahtiella jaanussoni Hessland, 1949 | Kunda Stage
18. Ahtiella lirata Öpik, 1932 | Kunda Stage
19. Ahtiella oelandica Hessland, 1949e | Kunda Stage
20. Ahtiella plana Hessland, 1949 | Kunda Stage
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Map shows only the first 1000 localities
Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Agmata | 
| incertae sedis | |
| Annelida | |
| Arthropoda | |
| Brachiopoda | |
| Subphylum | Craniiformea | 
| Linguliformea | |
| Rhynchonelliformea | |
| Phylum | Bryozoa | 
| Chordata | |
| Cnidaria | |
| Echinodermata | |
| Hemichordata | |
| Mollusca | |
| Onychophora | |
| Pogonophora | |
| Porifera | |
| Priapulida | |
| Subphylum | Lophotrochozoa | 
| Class | Chitinozoa | 
| Order | Hyolithelminthida |