Trilobita

Weidner, T., Ebbestad, J. O. R. 2018. Anopolenus henrici Salter, a middle Cambrian (Drumian) centropleurid trilobite from the Alum Shale Formation of Scandinavia. Bulletin of the Geological Society of Denmark 66, 223-228. DOI:10.37570/bgsd-2018-66-13

Vinn, O., Ernst, A., Toom, U., Isakar, M. 2018. Cryptic encrusting fauna inside invertebrate fossils from the Ordovician of Estonia. Annales Societatis Geologorum Poloniae 88, 3, 285-290. DOI:10.14241/asgp.2018.008

Rushton, A., Weidner, T., Ebbestad, J. 2016. Paradoxidid trilobites from a mid-Cambrian (Series 3, stage 5) limestone concretion from Jämtland, central Sweden. Bulletin of Geosciences 91, 3, 515-552. DOI:10.3140/bull.geosci.1606

Weidner, T., Nielsen, A. T 2016. Tomagnostus brantevikensis n. sp. (Trilobita) from the middle Cambrian of Scania, Sweden. Bulletin of the Geological Society of Denmark 64, 111–116. DOI:10.37570/bgsd-2016-64-06

Rasmussen, B. W., Nielsen, A. T., Schovsbo, N. H. 2015. Faunal succession in the upper Cambrian (Furongian) Leptoplastus Superzone at Slemmestad, southern Norway. Norwegian Journal of Geology 95, 1, 1-22. DOI:10.17850/njg95-1-01

Høyberget, M., Ebbestad, J. O. R., Funke, B., Nakrem, H. A. 2015. The shelly fauna and biostratigraphy of the lower Cambrian (provisional series 2, stage 4) Evjevik Member, Ringstrand Formation in the Mjøsa area, Norway. Norwegian Journal of Geology , DOI:10.17850/njg95-1-02

Żylińska, A., Weidner, T., Ahlgren, J., Ahlberg, P. 2015. Exotic trilobites from the uppermost Cambrian Series 3 and lower Furongian of Sweden. Acta Geologica Polonica 65, 1, 21-67. DOI:10.1515/agp-2015-0002

Hints, L., Männik, P. 2014. Stop A10: Porkuni quarry. 4th Annual Meeting of IGCP 591, Estonia, 10-19 June 2014. Abstracts and Field Guide, pp. 167-172.

Pärnaste, H., Bergström, J. 2013. The asaphid trilobite fauna: Its rise and fall in Baltica. Palaeogeography, Palaeoclimatology, Palaeoecology 389, 64-77. DOI:10.1016/j.palaeo.2013.06.007

Krueger, H.-H. 2013. Die Unterfamilie Chasmopinae (Trilobita, Pterygometopidae) aus baltoskandischen Geschieben sowie Baltoskandia und angrenzenden Gebieten.

Pärnaste, H., Bergström, J., Zhou, Z.-Y. 2013. High-resolution trilobite stratigraphy of the Lower-Middle Ordovician Öland Series of Baltoscandia. Geological Magazine 150, 3, 509–518. DOI:10.1017/S0016756812000908

Pärnaste, H. 2012. Suurte silmadega väike mereelukas Telephina. Eesti Loodus , 6-7, 20-23.

Pärnaste, H., Popp, A. 2011. First record of Telephina (Trilobita) from the Ordovician of northeastern Estonia and its stratigraphical implications. Estonian Journal of Earth Sciences 60, 2, 83-90. DOI:10.3176/earth.2011.2.02

Popp, A., Pärnaste, H. 2011. Biometry and lifestyle of the Ordovician proetide trilobite Cyamella stensioei Owens, 1979. GFF 133, 3-4, 111-123. DOI:10.1080/11035897.2011.599418

Dies Álvarez, M. E., Rushton, A. W. A., Gozalo, R., Pillola, G. L., Liñán, E., Ahlberg, P. 2010. Paradoxides brachyrhachis Linnarsson, 1883 versus Paradoxide smediterraneus Pompeckj, 1901: a problematic determination. DOI:10.1080/11035897.2010.481363

Stein, M., Bergström, J. 2010. Some lower Middle Ordovician species of Asaphus (Trilobita) from Sweden. GFF 132, 2, 105–116. DOI:10.1080/11035897.2010.486478

Terfelt, F., Ahlberg, P. 2010. Pseudagnostus rugosus Ergaliev, 1980: a key agnostoid species for intercontinental correlation of upper Furongian (Cambrian) strata. Geological Magazine 147, 5, 789-796. DOI:10.1017/S0016756810000282

Hoel, O. A. 2009. The post-cephalic morphology of the middle Ordovician trilobite Prionocheilus narinosus from the central Oslo Region, Norway. Norsk Geologisk Tidsskrift 89, 3, 247-249.

Pärnaste, H., Popp, A., Owens, R. M. 2009. Distribution of the Proetida (Trilobita) in Baltoscandian Ordovician strata. Estonian Journal of Earth Sciences 58, 1, 10-23. DOI:10.3176/earth.2009.1.02

Popp, A., Pärnaste, H. 2008. Morphometric study of the Ordovician proetid trilobite Cyamella stensioei Owens, 1978. Advances in trilobite research, pp. 327-332.

Pärnaste, H. 2008. Xylabion and related genera. Advances in trilobite research, pp. 307-312.

Rushton, A. W. A., Weidner, T. 2007. The Middle Cambrian paradoxidid trilobite Hydrocephalus from Jämtland, central Sweden. Acta Geologica Polonica 57, 4, 391-401.

Terfelt, F., Ahlgren, J. 2007. Macropyge (Promacropyge) scandinavica new species; the first macropyginid trilobite recorded from the Furongian of Baltica. Journal of Paleontology 81, 6, 1516-1522. DOI:10.1666/06-020R.1

Pärnaste, H. 2006. The Early Ordovician trilobite distribution and zonation of the East Baltic. Proceedings of the Estonian Academy of Sciences. Geology 55, 2, 109-127. DOI:10.3176/geol.2006.2.03

Pärnaste, H. 2006. The earliest encrinurid trilobites from the East Baltic and their taxonomic interest. Palaeontology 49, 1, 155-170. DOI:10.1111/j.1475-4983.2005.00535.x

Axheimer, N. 2006. The Middle Cambrian Eodiscoid trilobite Dawsonia oelandica (Westergård, 1936). Journal of Paleontology 80, 1, 193-200. DOI:10.1666/0022-3360(2006)080[0193:TMCETD]2.0.CO;2

Axheimer, N., Eriksson, M. E., Ahlberg, P., Bengtsson, A. 2006. The middle Cambrian cosmopolitan key species Lejopyge laevigata and its biozone: new data from Sweden. Geological Magazine 143, 4, 447-455. DOI:10.1017/S0016756806002007

Pärnaste, H. 2004. Revision of the Ordovician cheirurid trilobite genus Reraspis with the description of the earliest representative. Proceedings of the Estonian Academy of Sciences. Geology 53, 2, 125-138. DOI:10.3176/geol.2004.2.03

Ivantsov, A. Yu. 2003. Ordovician Trilobites of the Subfamily Asaphinae of the Ladoga Glint. Paleontological Journal 37, Suppl.3, 1-337.

Bird, C., Clarkson, E. 2003. Observations on the ontogeny of the upper Cambrian trilobite Peltura scarabaeoides westergaardi Henningsmoen, 1957. GFF 125, 4, 177-190. DOI:10.1080/11035890301254177

Pärnaste, H. 2003. The Lower Ordovician trilobite Krattaspis: the earliest cyrtometopinid (Cheiruridae) from the Arenig of the east Baltic. Special Papers in Palaeontology 70, 241-257.

Krueger, H.-H. 2002. Atractocybeloides, eine kleinwüchsige Trilobitengattung aus baltoskandischen Geschieben und ihrem Anstehenden. Mitteilungen aus dem Museum für Naturkunde der Humboldt-Universität in Berlin , 105-120.

Rõõmusoks, A. 2000. The new trilobite genus Valdariops from the Harju Series (Upper Ordovician) of Estonia. Proceedings of the Estonian Academy of Sciences. Geology 49, 1, 28-43. DOI:10.3176/geol.2000.1.03

Ivantsov, A. Yu. 2000. New Taxa of Asaphid Trilobites (Ptychopariida: Asaphinae) from the Ordovician of Leningrad Region. Paleontologicheski Zhurnal 4, 50-56.

Ebbestad, J. O. R. 1999. Trilobites of the Tremadoc Bjørkåsholmen Formation in the Oslo Region, Norway. Fossils and Strata 47, 1-118.

Rõõmusoks, A. 1998. Trilobites of the genus Toxochasmops from the Ordovician of Estonia. Proceedings of the Estonian Academy of Sciences. Geology 47, 3, 173-194. DOI:10.3176/geol.1998.3.04

Barwick, R. E., Campbell, K. S. W., Mark-Kurik, E. 1997. Tarachomylax: A new early Devonian dipnoan from Severnaya Zemlya, and its place in the evolution of the Dipnoi. Geobios 30, 1, 45-73. DOI:10.1016/S0016-6995(97)80257-4

Raukas, A., Teedumäe, A. (eds) 1997. Geology and Mineral Resources of Estonia.

Bruton, D. L., Hoel, O. A., Beyene, L. T., Ivantsov, A. Yu. 1997. Catalogue of the trilobites figured in Friedrich Schmidt's "Revision der ostbaltischen silurischen Trilobiten" (1881-1907). Paleontological Contributions from the University of Oslo 403, 1-115.

Edgecombe, G. D., Ramsköld, L. 1996. The "Encrinurus" variolaris plexus (Trilobita, Silurian): relationships of Llandovery species. Geobios 29, 2, 209-233. DOI:10.1016/S0016-6995(96)80045-3

Melnikov, S. A. 1995. New trilobites from the Lower/Middle Ordovician boundary Deposits in Leningrad oblast. Paleontologicheski Zhurnal , 4, 131-135.

Ahlberg, P. 1995. Telephinid trilobites from the Ordovician of the East Baltic. GFF 117, 1, 49-52. DOI:10.1080/11035899509546196

Nielsen, A. 1995. Trilobite systematics, biostratigraphy and palaeoecology of the Lower Ordovician Komstad Limestone and Huk Formations, southern Scandinavia. Fossils and Strata 38, 1-374.

Ramsköld, L., Adrain, J. M., Edgecombe, G. D., Siveter, D. J. 1994. Silurian calymenid trilobite Alcymene n. gen., with new species from the Ludlow of Gotland, Sweden. Journal of Paleontology 68, 3, 556-569. DOI:10.1017/S0022336000025920

Ramsköld, L., Edgecombe, G. D. 1994. Revision of the Silurian encrinurine trilobite Wallacia Lamont 1978, with species from Gotland and Canada. Paläontologische Zeitschrift 68, 1/2, 89-115. DOI:10.1007/BF02989435

Krueger, H.-H. 1993. Ruegenometopus (Pterygometopinae) - eine neue Trilobitengattung aus einem mittelordovizischen Geschiebe. Archiv für Geschiebekunde 1, 7, 455-458.

Jaanusson, V., Ramsköld, L. 1993. Pterygometopine trilobites from the Ordovician of Baltoscandia. Palaeontology 36, 4, 743-769.

Kielan-Jaworowska, Z., Bergström, J. Ahlberg, P. 1991. Cheirurina (trilobita) from the Upper Ordovician of Västergötland and other regions of Sweden. GFF 113, 2-3, 219-244. DOI:10.1080/11035899109453857

Ramsköld, L., Chatterton B. D. E. 1991. Revision and subdivision of the polyphyletic `Leonaspis´ (Trilobita). Transactions of the Royal Society of Edinburgh Earth Sciences 82, 4, 333-371. DOI:10.1017/S026359330000420X

Rõõmusoks, A. 1991. On the stratigraphy and fauna of the boundary beds between the Pirgu and Porkuni stages in North Estonia. Acta et Commentationes Universitatis Tartuensis 934, XII, 23-42. Eesti Ordoviitsiumi paleontoloogia ja stratigraafia, pp. 23-42.

Männil, Reet 1990. Silurian trilobites. Field Meeting Estonia 1990. An Excursion Guidebook, pp. 74-76.

Rõõmusoks, A. 1989. Über die Divergenz der Leptaenidae (Brachiopoda) in der Viru-und Harju-zeit in Baltoscandia. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 38, 3, 112-117. DOI:10.3176/geol.1989.3.03

Bassett, M. G., Kaljo, D., Teller, L. 1989. The Baltic region. National Museum of Wales, Geological Series 9, 158-170. A Global Standard for the Silurian System, pp. 158-170.

Männil, Ralf 1987. Explanatory notes to the stratigraphical chemes of the Ordovician deposits. Resolutions of the interdepartmental stratigraphical conference on the East European Platform in 1984, with regional stratigraphical schemes, pp. 17-57.

Männil, Reet 1987. New phacopid trilobites from the Upper Silurian of the East Baltic. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 36, 3, 113-120. DOI:10.3176/geol.1987.3.03

Fortey, R. A. 1986. The type species of the Ordovician trilobite Symphysurus: systematic functional morphology and terrace ridges. Paläontologische Zeitschrift 60, 3/4, 255-275. DOI:10.1007/BF02985671

Ramsköld, L. 1986. Silurian encrinurid trilobites from Gotland and Dalarna, Sweden. Palaeontology 29, 3, 527-575.

Rõõmusoks, A. 1986. Oculichasmops - a new genus of the trilobite subfamily Chasmopinae. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 35, 4, 156-159. DOI:10.3176/geol.1986.4.03

Ramsköld, L. 1985. Silurian phacopid and dalmanitid trilobites from Gotland. Stockholm Contributions in Geology 40, 1-62.

Ramsköld, L. 1984. Silurian odontopleurid trilobites from Gotland. Palaeontology 27, 2, 239-264.

Männil, Reet 1983. Upper Silurian Calymenidae (Trilobita) of the East Baltic. Lower Paleozoic paleontology of Baltics and Podolia, pp. 72-100.

Ramsköld, L. 1983. Silurian cheirurid trilobites from Gotland. Palaeontology 27, 2, 175-210.

Männil, Reet 1982. Trilobite communities (Wenlock, East Baltic). Communities and biozones in the Baltic Silurian Communities and biozones in the Baltic Silurian, pp. 51-62.

Männil, Reet 1981. Late Silurian proetidae (Trilobita) of Estonia. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 30, 3, 98-105. DOI:10.3176/geol.1981.3.02

Männil, Reet 1979. Silurian trilobites of the subfamily Warburgellinae of the East Baltic area. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 28, 3, 99-107. DOI:10.3176/geol.1979.3.04

Bassett, M. G., Cocks, L. R. M., Holland, C. H., Ingham, J. K., Lawson, J. D., Rickards, R. B., Temple, J. T. 1979. Field meeting, Great Britain March 30- April 11, 1979.

Männil, Reet 1978. Wenlockian trilobites of the Encrinurus punctatus species-group of the East Baltic. Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология 27, 3, 108-113. DOI:10.3176/geol.1978.3.05

Owens, R. M. 1978. The trilobite genera Panarchaeogonus Öpik, Isbergia Warburg and Cyamops gen. nov. from the Ordovician of Balto-Scandia and British Isles. Norsk Geologisk Tidsskrift 58, 199-219.

Männil, Reet 1977. East Baltic Lower Silurian Calymenidae (Trilobita). Facies and fauna of the Baltic Silurian, pp. 240-258.

Männil, Reet 1977. Some new Llandoverian encrinurid trilobites of the East Baltic area. Eesti NSV Teaduste Akadeemia Toimetised. Keemia, Geoloogia / Известия Академии наук Эстонской ССР. Химия. Геология 26, 1, 46-56. DOI:10.3176/chem.geol.1977.1.08

Bruton, D. L. 1976. The trilobite genus Phillipsinella from the Ordovician of Scandinavia and the Baltic areas. Palaeontology 19, 4, 699 – 718.

Balashova, E. A. 1976. Sistematika trilobitov Asaphina i ih predstaviteli v SSSR.

Bergström, J. 1973. Classification of olenellid trilobites and some Balto-Scandian species. Norsk Geologisk Tidsskrift 53, 3, 283-314.

Korkutis, V. A. 1971. The Cambrian deposits of the Baltic area.

Männil, Reet 1970. Phacopid trilobites of the Upper Llandoverian of Estonia. Eesti NSV Teaduste Akadeemia Toimetised. Keemia, Geoloogia / Известия Академии наук Эстонской ССР. Химия. Геология 19, 4, 342-349. DOI:10.3176/chem.geol.1970.4.10

Balashova, E. A., Korkutis, V. A. 1970. On the first find of the Upper Cambrian trilobite in the Tyskre suite of the Baltic area. Palaeontology and Stratigraphy of the Baltic and the Byelorussia. Number II, pp. 341-344.

Männil, Reet 1970. Estonian Lower and Middle Llandoverian trilobites of the genus Acernaspis. Eesti NSV Teaduste Akadeemia Toimetised. Keemia, Geoloogia / Известия Академии наук Эстонской ССР. Химия. Геология 19, 2, 156-165. DOI:10.3176/chem.geol.1970.2.10

Bruton, D. L. 1968. The trilobite genus Panderia from the Ordovician of Scandinavia and the Baltic areas. Norsk Geologisk Tidsskrift 48, 1,2, 1-53.

Männil, Reet 1968. Encrinurus Schmidti sp. n. (Trilobita) from the Llandoverian of Estonia. Eesti NSV Teaduste Akadeemia Toimetised. Keemia, Geoloogia / Известия Академии наук Эстонской ССР. Химия. Геология 17, 3, 273-283. DOI:10.3176/chem.geol.1968.3.09

Bruton, D. L. 1968. Ordovician odontopleurid trilobites from Estonia and Latvia. Lethaia 1, 3, 288-302. DOI:10.1111/j.1502-3931.1968.tb01742.x

Bruton, D. L. 1967. Silurian odontopleurid trilobites from Sweden, Estonia, and Latvia. Palaeontology 10, 2, 214-244.

Bruton, D. L. 1966. A Revision of the Swedish Ordovician Odontopleuridae (Trilobita). Bulletin of the Geological Institutions of the University of Uppsala 43, 6-8, 1-40.

Männil, Ralf 1966. O vertikal'nyh norkah zaryvaniâ v ordovikskih izvestnâkah Pribaltiki. The organism and environment in the geological past, pp. 200-207.

Balashova, E. A. 1964. Morfologiâ, filogeniâ i stratigrafičeskoe značenie ranneordovikskogo podsemejstva Ptychopyginae Pribaltiki. Voprosy paleontologii IV, 3-56. Voprosy paleontologii, IV, pp. 3-56.

Männil, Ralf 1963. The biostratigraphic subdivision of the Ordovician strata in Western Latvia. ENSV TA Geoloogia Instituudi uurimused XIII, 41-74. ENSV Teaduste Akadeemia Geoloogia Instituudi Uurimused XIII, pp. 41-74.

Männil, Ralf 1963. On the correlation of the Ordovician strata of Estonia and Leningrad region. ENSV TA Geoloogia Instituudi uurimused XIII, 3-40. ENSV Teaduste Akadeemia Geoloogia Instituudi Uurimused XIII, pp. 3-40.

Tripp, R. P. 1962. The Silurian trilobite Encrinurus punctatus (Wahlenberg) and allied species. Palaeontology 5, 3, 460-477.

Nikolaisen, F. 1961. The Middle Ordovician of the Oslo Region, Norway: 7. Trilobites of the suborder Cheirurina. Norsk Geologisk Tidsskrift 41, 2-4, 279-310.

Männil, Ralf 1958. New Cryptostomatous Bryozoans from the Ordovician of Estonia. Eesti NSV Teaduste Akadeemia Toimetised, Tehniliste ja Füüsikalis-matemaatiliste teaduste seeria / Известия Академии наук Эстонской ССР. Серия технических и физико-математических наук 7, 4, 330-347. DOI:10.3176/tech.phys.math.1958.4.07

Männil, Ralf 1958. Trilobites of the families Cheiruridae and Encrinuridae from Estonia. ENSV TA Geoloogia Instituudi uurimused III, 165-212.

Whittington, H. B., Bohlin, B. 1958. New Lower Ordovician Odontopleuridae (Trilobita) from Öland. Bulletin of the Geological Institutions of the University of Uppsala 38, 37-45.

Männil, Ralf 1957. Estoniops - A New Genus of Phacopidae (Trilobita). Eesti NSV Teaduste Akadeemia Toimetised, Tehniliste ja Füüsikalis-matemaatiliste teaduste seeria / Известия Академии наук Эстонской ССР. Серия технических и физико-математических наук 6, 4, 385-388. DOI:10.3176/tech.phys.math.1957.4.10

Jaanusson, V. 1957. Unterordovizische Illaeniden aus Skandinavien. Mit Bemerkungen über die Korrelation des Unterordoviziums. Bulletin of the Geological Institutions of the University of Uppsala 37, 79–165.

Skjeseth, S. 1955. The Middle Ordovician of the Oslo Region, Norway: 5. The Trilobite Family Styginidae. Norsk Geologisk Tidsskrift 35, 9-28.

Jaanusson, V. 1953. Untersuchungen über baltoskandische Asaphiden I. Revision der mittordovizischen Asaphiden des Siljan-Gebietes in Dalarna.. Arkiv för Mineralogi och Geologi 1, 14, 377-464.

Rõõmusoks, A. 1953. New data on the Ordovician trilobite genus Chasmops of Estonia. Loodusuurijate Seltsi Juubelikoguteos, pp. 397-413.

Rosenstein, E. 1941. Die Encrinurus-Arten des estländichen Silurs. Tartu Ülikooli juures oleva Loodusuurijate Seltsi Aruanded 47, 1-2, 49-80.

Thorslund, P. 1940. On the Chasmops series of Jämtland and Södermanland (Tvären). Sveriges Geologiska Undersökning , 1-191.

Siegfried, P. 1939. Zur Kenntnis estländischer Trilobiten Mit einem Zusatz: Über Antennula-Zapfen und das Hyposyom von A Öpik. Tartu Ülikooli juures oleva Loodusuurijate Seltsi Aruanded 44, 1-2, 159-172.

Luha, A. 1939. Paar uut kivistist Saaremaa lademeist. Eesti Loodus VII, 2/3, 98-99.

Öpik, A. 1937. Ostracoda from the Ordovician Uhaku and Kukruse formations of Estonia. Tartu Ülikooli Geoloogia Instituudi Toimetused 50, 1-58.

Öpik, A. 1937. Trilobiten aus Estland. Tartu Ülikooli Geoloogia Instituudi Toimetused 52, 1-163.

Siegfried, P. 1936. Über das Pandersche Organ bei den Asaphiden des ostbaltischen Ordoviciums. Eesti Loodusteaduse Arhiiv XI, 2, 1-42.

Thorslund, P. 1930. Über einige neue Trilobiten aus dem älteren Leptænakalk Dalekarliens. Bulletin of the Geological Institutions of the University of Uppsala 22, 299-303.

Winkler, H. von (comp) 1930. Der Estländische Brennschiefer. Untersuchung, Gewinnung und Verwertung.

Öpik, A. 1930. Beiträge zur Kenntnis der Kukruse-(C2-C3-)Stufe in Eesti. IV. Tartu Ülikooli Geoloogia Instituudi Toimetused 24, 1-34.

Öpik, A. 1928. Beiträge zur Kenntnis der Kukruse-(C2-C3-) Stufe in Eesti. III. Tartu Ülikooli Geoloogia Instituudi Toimetused 12, 1-42.

Öpik, A. 1927. Beiträge zur Kenntnis der Kukruse-(C2-) Stufe in Eesti. II. Tartu Ülikooli Geoloogia Instituudi Toimetused 10, 1-35.

Öpik, A. 1926. Über die Kalksandsteinfacies des Vaginatenkalkes auf der Halbinsel Baltischport und über ein Acidaspis-Pygidium aus denselben Schichten. Tartu Ülikooli juures oleva Loodusuurijate Seltsi Aruanded 32, 1-2, 1-7.

Öpik, A. 1925. Beiträge zur Kenntnis der Kukruse-(C2-) Stufe in Eesti. I. Acta et Commentationes Universitatis Tartuensis VIII, 5, 1-18.

Bekker, H. 1925. Lühike ülevaade Eesti geoloogiast (Eozoiline ja paleozoiline ladekond). Eesti Loodus. Äratrükk koguteosest "Eesti", pp. 31-61.

Öpik, A. 1925. Beitrag zur Stratigraphie und Fauna des estnischen Unter-Kambriums (Eophyton-Sandstein). Tartu Ülikooli Geoloogia Instituudi Toimetused 3, 1-19.

Bekker, H. 1921. The Kuckers stage of the Ordovician Rocks in NE Estonia. Acta et Commentationes Universitatis Tartuensis II, 1, 1-92.

Schmidt, Fr. 1907. Revision der ostbaltischen silurischen Trilobiten. Abt. VI. Allgemeine Übersicht mit Nachträgen und Verbesserungen. Mémoires de l´Académie Impériale des Sciences de St.-Petersbourg 20, 8, 1-104.

Lamansky, V. V. 1905. Drevnejšie sloi silurijskih otloženij Rossii. Memoires du Comite Geologique 20, 1-147.

Schmidt, Fr. 1904. Revision der ostbaltischen silurischen Trilobiten. Abt. V. Asaphiden. Lief III. Enthaltend die Gattungen Ptychopyge (Pseudasaphus, Basilicus und Ptychopyge sens. str.), Ogygia und Nileus. Mémoires de l´Académie Impériale des Sciences de St.-Petersbourg 14, 10, 1-68.

Schmidt, Fr. 1901. Revision der ostbaltischen silurischen Trilobiten. Abt. V. Asaphiden. Lief. II. Die Gattungen Asaphus sens. str., Onchometopus, Isotelus und Niobe enthaltend. Mémoires de l´Académie Impériale des Sciences de St.-Petersbourg 12, 8, 1-113.

Schmidt, Fr. 1898. Revision der ostbaltischen silurischen Trilobiten. Abt. V. Asaphiden. Lief I. Mémoires de l´Académie Impériale des Sciences de St.-Petersbourg 6, 11, 1–46.

Schmidt, Fr. 1881. Revision der ostbaltischen silurischen Trilobiten nebst geognostischer Übersicht des ostbaltischen Silurgebiets. Abt. I. Phacopiden, Cheiruriden und Encrinuriden. Mémoires de l´Académie Impériale des Sciences de St.-Petersbourg 30, 1, 1-237.

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Trilobita Walch, 1771

Trilobites