taxonID	namePublishedIn	acceptedNameUsageID	parentNameUsageID	originalNameUsageID	kingdom	phylum	class	order	family	genus	taxonRank	scientificName	scientificNameAuthorship	canonicalName	verbatimScientificName	basionymAuthors	basionymYear	combinationAuthors	combinationYear	taxonomicStatus	nomenclaturalStatus	references	taxonRemarks
93268783967C702CFDBDFBDDFB40FA02.taxon					Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Cameroceras	genus	Cameroceras Conrad 1842	Conrad 1842	Cameroceras	Cameroceras Conrad, 1842			Conrad	1842			https://treatment.plazi.org/id/93268783967C702CFDBDFBDDFB40FA02	
93268783967C702BFDCCF9B6FC87FE36.taxon					Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Cameroceras	species	Cameroceras hasta (Eichwald 1857)	(Eichwald 1857)	Cameroceras hasta	Cameroceras hasta (Eichwald, 1857)	Eichwald	1857					https://treatment.plazi.org/id/93268783967C702BFDCCF9B6FC87FE36	
93268783967C702BFDCCF9B6FC87FE36.taxon.syn1	Eichwald E. D. von 1857. Beitrag zur geographischen Verbreitung der fossilen Thiere Russlands. Alte Periode. Bulletin de la Societe imperiale des Naturalistes de Moscou 30: 192-212. Available from https://www.biodiversitylibrary.org/page/44192481 [accessed 20 Jan. 2025].	93268783967C702BFDCCF9B6FC87FE36.taxon			Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Endoceras	species	Endoceras hasta Eichwald 1857	Eichwald 1857	Endoceras hasta	Endoceras hasta Eichwald, 1857: 194			Eichwald	1857	synonym		https://treatment.plazi.org/id/93268783967C702BFDCCF9B6FC87FE36	
93268783967C702BFDCCF9B6FC87FE36.taxon.syn2	Stumbur H. A. 1956. O nautiloideah Kohilaskogo arusa (Verhnij Ordovik Pribaltiki). Tartu Riikliku Ulikooli Toimetised 42: 176-185.	93268783967C702BFDCCF9B6FC87FE36.taxon			Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Endoceras	species	Endoceras magnum Stumbur 1956	Stumbur 1956	Endoceras magnum	Endoceras magnum Stumbur, 1956: 182 – 183			Stumbur	1956	synonym		https://treatment.plazi.org/id/93268783967C702BFDCCF9B6FC87FE36	
93268783967C702BFDCCF9B6FC87FE36.taxon.syn3	Balashov Z. G. 1968. Endoceratoidei ordovika SSSR. Isdatelstvo Leningradskogo Universiteta, Leningrad.	93268783967C702BFDCCF9B6FC87FE36.taxon			Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Rossicoceras	species	Rossicoceras pirguense Balashov 1968	Balashov 1968	Rossicoceras pirguense	Rossicoceras pirguense Balashov, 1968: 113			Balashov	1968	synonym		https://treatment.plazi.org/id/93268783967C702BFDCCF9B6FC87FE36	
93268783967C702BFDCCF9B6FC87FE36.taxon.syn4	Greenfield T. 2023. Endoceras novamagnum nom. nov., a replacement name for Endoceras magnum Stumbur, 1956 (Cephalopoda, Endocerida). Munis Entomology & Zoology 18 (2): 1790-1790.	93268783967C702BFDCCF9B6FC87FE36.taxon			Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Endoceras	species	Endoceras novomagnum Greenfield 2023	Greenfield 2023	Endoceras novomagnum	Endoceras novomagnum Greenfield, 2023: 1790			Greenfield	2023	synonym		https://treatment.plazi.org/id/93268783967C702BFDCCF9B6FC87FE36	
93268783967C702BFDCCF9B6FC87FE36.taxon.syn5		93268783967C702BFDCCF9B6FC87FE36.taxon			Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Endoceras	species	Endoceras megastoma Eichwald 1857	Eichwald 1857	Endoceras megastoma	Endoceras megastoma			Eichwald	1857	synonym		https://treatment.plazi.org/id/93268783967C702BFDCCF9B6FC87FE36	
93268783967C702BFDCCF9B6FC87FE36.taxon.syn6		93268783967C702BFDCCF9B6FC87FE36.taxon			Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Rossicoceras	species	Rossicoceras hasta (Balashov 1962) Eichwald 1857	(Balashov 1962) Eichwald 1857	Rossicoceras hasta	Rossicoceras hasta	Balashov	1962	Eichwald	1857	synonym		https://treatment.plazi.org/id/93268783967C702BFDCCF9B6FC87FE36	
93268783967B702BFDDFFDA9FED9F8A8.taxon					Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Cameroceras	species	Cameroceras regulus (Eichwald 1860)	(Eichwald 1860)	Cameroceras regulus	Cameroceras regulus (Eichwald, 1860)	Eichwald	1860					https://treatment.plazi.org/id/93268783967B702BFDDFFDA9FED9F8A8	
93268783967B702BFDDFFDA9FED9F8A8.taxon.syn1	Eichwald E. D. von 1857. Beitrag zur geographischen Verbreitung der fossilen Thiere Russlands. Alte Periode. Bulletin de la Societe imperiale des Naturalistes de Moscou 30: 192-212. Available from https://www.biodiversitylibrary.org/page/44192481 [accessed 20 Jan. 2025].	93268783967B702BFDDFFDA9FED9F8A8.taxon			Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Endoceras	species	Endoceras regulus Eichwald 1857	Eichwald 1857	Endoceras regulus	Endoceras regulus Eichwald, 1857: 177			Eichwald	1857	synonym		https://treatment.plazi.org/id/93268783967B702BFDDFFDA9FED9F8A8	
93268783967B702BFDDFFDA9FED9F8A8.taxon.syn2		93268783967B702BFDDFFDA9FED9F8A8.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Orthoceratidae	Orthoceras	species	Orthoceras turris Angelin 1880	Angelin 1880	Orthoceras turris	Orthoceras turris Angelin			Angelin	1880	synonym		https://treatment.plazi.org/id/93268783967B702BFDDFFDA9FED9F8A8	
93268783967B702BFDDFFDA9FED9F8A8.taxon.syn3	Stumbur H. A. 1956. O nautiloideah Kohilaskogo arusa (Verhnij Ordovik Pribaltiki). Tartu Riikliku Ulikooli Toimetised 42: 176-185.	93268783967B702BFDDFFDA9FED9F8A8.taxon			Animalia	Mollusca	Cephalopoda	Endoceratida	Endoceratidae	Endoceras	species	Endoceras iucundum Stumbur 1956	Stumbur 1956	Endoceras iucundum	Endoceras iucundum Stumbur, 1956: 181			Stumbur	1956	synonym		https://treatment.plazi.org/id/93268783967B702BFDDFFDA9FED9F8A8	
9326878396787028FDB6FE36FB68FD0F.taxon					Animalia	Mollusca	Cephalopoda	Actinoceratida	Armenoceratidae	Nybyoceras	genus	Nybyoceras Troedsson 1926	Troedsson 1926	Nybyoceras	Nybyoceras Troedsson, 1926			Troedsson	1926			https://treatment.plazi.org/id/9326878396787028FDB6FE36FB68FD0F	
9326878396787029FDCEFCB7FBC2FCD1.taxon					Animalia	Mollusca	Cephalopoda	Actinoceratida	Armenoceratidae	Nybyoceras	species	Nybyoceras bekkeri Troedsson 1926	Troedsson 1926	Nybyoceras bekkeri	Nybyoceras bekkeri Troedsson, 1926			Troedsson	1926			https://treatment.plazi.org/id/9326878396787029FDCEFCB7FBC2FCD1	
9326878396787029FDCEFCB7FBC2FCD1.taxon.syn1		9326878396787029FDCEFCB7FBC2FCD1.taxon			Animalia	Mollusca	Cephalopoda	Actinoceratida	Actinoceratidae	Actinoceras	species	Actinoceras bigsbyi Bronn 1837	Bronn 1837	Actinoceras bigsbyi	Actinoceras bigsbyi Bronn			Bronn	1837	synonym		https://treatment.plazi.org/id/9326878396787029FDCEFCB7FBC2FCD1	
9326878396787029FDCEFCB7FBC2FCD1.taxon.syn2		9326878396787029FDCEFCB7FBC2FCD1.taxon			Animalia	Mollusca	Cephalopoda	Actinoceratida	Armenoceratidae	Nybyoceras	species	Nybyoceras bekkei Troedsson 1926	Troedsson 1926	Nybyoceras bekkei	Nybyoceras bekkei			Troedsson	1926	synonym		https://treatment.plazi.org/id/9326878396787029FDCEFCB7FBC2FCD1	
9326878396667034FDDAFEB0FC52FADF.taxon					Animalia	Mollusca	Cephalopoda	Actinoceratida	Armenoceratidae	Nybyoceras	species	Nybyoceras intermedium Teichert 1930	Teichert 1930	Nybyoceras intermedium	Nybyoceras intermedium Teichert, 1930			Teichert	1930			https://treatment.plazi.org/id/9326878396667034FDDAFEB0FC52FADF	
9326878396647035FDAEFA1BFC0EFE72.taxon					Animalia	Mollusca	Cephalopoda	Actinoceratida	Ormoceratidae	Ormoceras	genus	Ormoceras Stokes 1840	Stokes 1840	Ormoceras	Ormoceras Stokes, 1840			Stokes	1840			https://treatment.plazi.org/id/9326878396647035FDAEFA1BFC0EFE72	
9326878396657032FDBFFE07FACEFCF8.taxon					Animalia	Mollusca	Cephalopoda	Actinoceratida	Ormoceratidae	Ormoceras	species	Ormoceras heckeri Teichert 1930	Teichert 1930	Ormoceras heckeri	Ormoceras heckeri Teichert, 1930			Teichert	1930			https://treatment.plazi.org/id/9326878396657032FDBFFE07FACEFCF8	
9326878396627032FD46FCFBFC4DFA0E.taxon					Animalia	Mollusca	Cephalopoda	Actinoceratida	Ormoceratidae	Ormoceras	species	Ormoceras undefined-A		Ormoceras undefined-A	Ormoceras sp. A							https://treatment.plazi.org/id/9326878396627032FD46FCFBFC4DFA0E	
9326878396627033FDA9F9AAFEE5FC8B.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Actinoceratida	Uranoceratidae	Gorbormoceras	genus	Gorbormoceras Kröger 2025	Kröger 2025	Gorbormoceras	Gorbormoceras			Kröger	2025		gen. nov.	https://treatment.plazi.org/id/9326878396627033FDA9F9AAFEE5FC8B	
9326878396637030FDFDFC2DFCDBFD3E.taxon					Animalia	Mollusca	Cephalopoda	Actinoceratida	Uranoceratidae	Gorbormoceras	species	Gorbormoceras vohilaidense Kröger 2025	Kröger 2025	Gorbormoceras vohilaidense	Gorbormoceras vohilaidense			Kröger	2025			https://treatment.plazi.org/id/9326878396637030FDFDFC2DFCDBFD3E	
9326878396607030FDCDFCDFFCC8FAF5.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Orthoceratidae	Pleurorthoceras	genus	Pleurorthoceras Flower 1962	Flower 1962	Pleurorthoceras	Pleurorthoceras Flower, 1962			Flower	1962			https://treatment.plazi.org/id/9326878396607030FDCDFCDFFCC8FAF5	
93268783966E703EFDF1FEB1FD8FFC8C.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Orthoceratidae	Striatocycloceras	genus	Striatocycloceras Kroger & Isakar 2006	Kroger & Isakar 2006	Striatocycloceras	Striatocycloceras Kröger & Isakar, 2006			Kroger & Isakar	2006			https://treatment.plazi.org/id/93268783966E703EFDF1FEB1FD8FFC8C	
93268783966E703DFDDFFC28FAFCFDD1.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Orthocerida	Orthoceratidae	Striatocycloceras	species	Striatocycloceras hosholmense Kröger 2025	Kröger 2025	Striatocycloceras hosholmense	Striatocycloceras hosholmense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783966E703DFDDFFC28FAFCFDD1	
93268783966D703BFDBDFDE2FE65FE8D.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Orthoceratidae	Striatocycloceras	species	Striatocycloceras hosholmense Kröger 2025	Kröger 2025	Striatocycloceras hosholmense	Striatocycloceras cf. hosholmense			Kröger	2025			https://treatment.plazi.org/id/93268783966D703BFDBDFDE2FE65FE8D	
9326878396687038FE14FB5DFED3F96A.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Dawsonoceratidae	Palaeodawsonocerina	genus	Palaeodawsonocerina Kroger & Isakar 2006	Kroger & Isakar 2006	Palaeodawsonocerina	Palaeodawsonocerina Kröger & Isakar, 2006			Kroger & Isakar	2006			https://treatment.plazi.org/id/9326878396687038FE14FB5DFED3F96A	
9326878396687006FE2FF90EFB05FD9B.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Dawsonoceratidae	Palaeodawsonocerina	species	Palaeodawsonocerina senckenbergi (Teichert 1930)	(Teichert 1930)	Palaeodawsonocerina senckenbergi	Palaeodawsonocerina senckenbergi (Teichert, 1930)	Teichert	1930					https://treatment.plazi.org/id/9326878396687006FE2FF90EFB05FD9B	
9326878396687006FE2FF90EFB05FD9B.taxon.syn1	Teichert C. 1930. Die Cephalopoden-Fauna der Lyckholm-Stufe des Ostbaltikums. Palaontologische Zeitschrift 12: 264-312. https://doi.org/10.1007/BF03044452	9326878396687006FE2FF90EFB05FD9B.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Pseudorthoceratidae	Spyroceras	species	Spyroceras senckenbergi Teichert 1930	Teichert 1930	Spyroceras senckenbergi	Spyroceras senckenbergi Teichert, 1930: 280			Teichert	1930	synonym		https://treatment.plazi.org/id/9326878396687006FE2FF90EFB05FD9B	
9326878396687006FE2FF90EFB05FD9B.taxon.syn2	Stumbur H. A. 1956. O nautiloideah Kohilaskogo arusa (Verhnij Ordovik Pribaltiki). Tartu Riikliku Ulikooli Toimetised 42: 176-185.	9326878396687006FE2FF90EFB05FD9B.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Pseudorthoceratidae	Spyroceras	species	Spyroceras saxbyense Stumbur 1956	Stumbur 1956	Spyroceras saxbyense	Spyroceras saxbyense Stumbur, 1956: 180			Stumbur	1956	synonym		https://treatment.plazi.org/id/9326878396687006FE2FF90EFB05FD9B	
9326878396687006FE2FF90EFB05FD9B.taxon.syn3		9326878396687006FE2FF90EFB05FD9B.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Pseudorthoceratidae	Spyroceras	species	Spyroceras undefined-A		Spyroceras undefined-A	Spyroceras sp. A					synonym		https://treatment.plazi.org/id/9326878396687006FE2FF90EFB05FD9B	
9326878396687006FE2FF90EFB05FD9B.taxon.syn4		9326878396687006FE2FF90EFB05FD9B.taxon			Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Gorbyoceras	species	Gorbyoceras duncanae		Gorbyoceras duncanae	Gorbyoceras duncanae					synonym		https://treatment.plazi.org/id/9326878396687006FE2FF90EFB05FD9B	
9326878396687006FE2FF90EFB05FD9B.taxon.syn5		9326878396687006FE2FF90EFB05FD9B.taxon			Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Gorbyoceras	species	Gorbyoceras senckenbergi		Gorbyoceras senckenbergi	Gorbyoceras? senckenbergi					synonym		https://treatment.plazi.org/id/9326878396687006FE2FF90EFB05FD9B	
9326878396567007FD86FD1DFA9FFE69.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Dawsonoceratidae	Palaeodawsonocerina	genus	Palaeodawsonocerina Kroger & Isakar 2006	Kroger & Isakar 2006	Palaeodawsonocerina	Palaeodawsonocerina			Kroger & Isakar	2006			https://treatment.plazi.org/id/9326878396567007FD86FD1DFA9FFE69	
9326878396577007FDDDFDA1FCFFFAA9.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Ephippiorthoceras	genus	Ephippiorthoceras Foerste 1924	Foerste 1924	Ephippiorthoceras	Ephippiorthoceras Foerste, 1924			Foerste	1924			https://treatment.plazi.org/id/9326878396577007FDDDFDA1FCFFFAA9	
9326878396577003FDC1FACBFAC2FBA3.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Ephippiorthoceras	species	Ephippiorthoceras vormsiense Kröger 2025	Kröger 2025	Ephippiorthoceras vormsiense	Ephippiorthoceras vormsiense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/9326878396577003FDC1FACBFAC2FBA3	
9326878396537001FDE5FBD6FA85FE36.taxon					Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Gorbyoceras	genus	Gorbyoceras Shimizu & Obata 1935	Shimizu & Obata 1935	Gorbyoceras	Gorbyoceras Shimizu & Obata, 1935			Shimizu & Obata	1935			https://treatment.plazi.org/id/9326878396537001FDE5FBD6FA85FE36	
932687839651700FFE5CFE42FBC4FB42.taxon					Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Gorbyoceras	species	Gorbyoceras clathratoannulatum (Roemer 1861) Kröger 2025	(Roemer 1861) Kröger 2025	Gorbyoceras clathratoannulatum	Gorbyoceras clathratoannulatum (Roemer, 1861)	Roemer	1861	Kröger	2025			https://treatment.plazi.org/id/932687839651700FFE5CFE42FBC4FB42	
932687839651700FFE5CFE42FBC4FB42.taxon.syn1	Roemer C. F. 1861. Die fossile Fauna der silurischen Diluvial-Geschiebe von Sadewitz bei Oels in Nieder-Schlesien. Robert Nischkowsky, Breslau.	932687839651700FFE5CFE42FBC4FB42.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Orthoceratidae	Orthoceras	species	Orthoceras clathrato-annulatum Roemer 1861	Roemer 1861	Orthoceras clathrato-annulatum	Orthoceras clathrato-annulatum Roemer, 1861: 57 – 58			Roemer	1861	synonym		https://treatment.plazi.org/id/932687839651700FFE5CFE42FBC4FB42	
932687839651700FFE5CFE42FBC4FB42.taxon.syn2		932687839651700FFE5CFE42FBC4FB42.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Pseudorthoceratidae	Spyroceras	species	Spyroceras clathrato-annulatum (Roemer 1861)	(Roemer 1861)	Spyroceras clathrato-annulatum	Spyroceras clathrato-annulatum	Roemer	1861			synonym		https://treatment.plazi.org/id/932687839651700FFE5CFE42FBC4FB42	
93268783965F700CFDC8FB76FDC7FC0A.taxon					Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Gorbyoceras	species	Gorbyoceras stumburi (Kroger 2013)	(Kroger 2013)	Gorbyoceras stumburi	Gorbyoceras stumburi (Kröger, 2013)	Kroger	2013					https://treatment.plazi.org/id/93268783965F700CFDC8FB76FDC7FC0A	
93268783965F700CFDC8FB76FDC7FC0A.taxon.syn1	Kroger B. 2013. The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden. European Journal of Taxonomy 41: 1-110. https://doi.org/10.5852/ejt.2013.41	93268783965F700CFDC8FB76FDC7FC0A.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Dawsonoceratidae	Dawsonoceras	species	Dawsonoceras stumburi Kroger 2013	Kroger 2013	Dawsonoceras stumburi	Dawsonoceras stumburi Kröger, 2013: 32 – 34			Kroger	2013	synonym		https://treatment.plazi.org/id/93268783965F700CFDC8FB76FDC7FC0A	
93268783965F700CFDC8FB76FDC7FC0A.taxon.syn2		93268783965F700CFDC8FB76FDC7FC0A.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Dawsonoceratidae	Dawsonoceras	species	Dawsonoceras undetermined		Dawsonoceras undetermined	Dawsonoceras sp.					synonym		https://treatment.plazi.org/id/93268783965F700CFDC8FB76FDC7FC0A	
93268783965C700AFDF9FBAEFBC5FDF6.taxon					Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Gorbyoceras	species	Gorbyoceras textumaraneum (Roemer 1861)	(Roemer 1861)	Gorbyoceras textumaraneum	Gorbyoceras textumaraneum (Roemer, 1861)	Roemer	1861					https://treatment.plazi.org/id/93268783965C700AFDF9FBAEFBC5FDF6	
93268783965C700AFDF9FBAEFBC5FDF6.taxon.syn1		93268783965C700AFDF9FBAEFBC5FDF6.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Orthoceratidae	Orthoceras	species	Orthoceras textum-araneum Roemer 1861	Roemer 1861	Orthoceras textum-araneum	Orthoceras textum-araneum			Roemer	1861	synonym		https://treatment.plazi.org/id/93268783965C700AFDF9FBAEFBC5FDF6	
93268783965C700AFDF9FBAEFBC5FDF6.taxon.syn2		93268783965C700AFDF9FBAEFBC5FDF6.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Pseudorthoceratidae	Spyroceras	species	Spyroceras textum-araneum		Spyroceras textum-araneum	Spyroceras textum-araneum					synonym		https://treatment.plazi.org/id/93268783965C700AFDF9FBAEFBC5FDF6	
93268783965C700AFDF9FBAEFBC5FDF6.taxon.syn3		93268783965C700AFDF9FBAEFBC5FDF6.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Pseudorthoceratidae	Spyroceras	species	Spyroceras clathrato-annulatum (Roemer 1861)	(Roemer 1861)	Spyroceras clathrato-annulatum	Spyroceras cf. clathrato-annulatum	Roemer	1861			synonym		https://treatment.plazi.org/id/93268783965C700AFDF9FBAEFBC5FDF6	
93268783965C700AFDF9FBAEFBC5FDF6.taxon.syn4		93268783965C700AFDF9FBAEFBC5FDF6.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Pseudorthoceratidae	Spyroceras	species	Spyroceras textum-aranaceum Roemer 1861	Roemer 1861	Spyroceras textum-aranaceum	Spyroceras textum-aranaceum			Roemer	1861	synonym		https://treatment.plazi.org/id/93268783965C700AFDF9FBAEFBC5FDF6	
93268783965A700AFD5CFD81FD8FFB35.taxon					Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Gorbyoceras	species	Gorbyoceras undefined-A		Gorbyoceras undefined-A	Gorbyoceras sp. A							https://treatment.plazi.org/id/93268783965A700AFD5CFD81FD8FFB35	
93268783965A700AFDA3FB4FFE37F95F.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Isorthoceras	genus	Isorthoceras Flower 1962	Flower 1962	Isorthoceras	Isorthoceras Flower, 1962			Flower	1962			https://treatment.plazi.org/id/93268783965A700AFDA3FB4FFE37F95F	
93268783965A7016FDF2F967FBC8FB1C.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Isorthoceras	species	Isorthoceras luhai (Stumbur 1956) Kröger 2025	(Stumbur 1956) Kröger 2025	Isorthoceras luhai	Isorthoceras luhai (Stumbur, 1956)	Stumbur	1956	Kröger	2025			https://treatment.plazi.org/id/93268783965A7016FDF2F967FBC8FB1C	
93268783965A7016FDF2F967FBC8FB1C.taxon.syn1		93268783965A7016FDF2F967FBC8FB1C.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Orthoceratidae	Orthoceras	species	Orthoceras luhai Stumbur 1956	Stumbur 1956	Orthoceras luhai	Orthoceras luhai			Stumbur	1956	synonym		https://treatment.plazi.org/id/93268783965A7016FDF2F967FBC8FB1C	
93268783965A7016FDF2F967FBC8FB1C.taxon.syn2		93268783965A7016FDF2F967FBC8FB1C.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Orthoceratidae	Michelinoceras	species	Michelinoceras dnestrovense Balashov 1975	Balashov 1975	Michelinoceras dnestrovense	Michelinoceras dnestrovense			Balashov	1975	synonym		https://treatment.plazi.org/id/93268783965A7016FDF2F967FBC8FB1C	
93268783965A7016FDF2F967FBC8FB1C.taxon.syn3		93268783965A7016FDF2F967FBC8FB1C.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Isorthoceras	species	Isorthoceras dalecarlense Kroger 2011	Kroger 2011	Isorthoceras dalecarlense	Isorthoceras dalecarlense			Kroger	2011	synonym		https://treatment.plazi.org/id/93268783965A7016FDF2F967FBC8FB1C	
9326878396467017FE27FA98FBF7F903.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Isorthoceras	species	Isorthoceras saaremense (Balashov 1959) Kröger 2025	(Balashov 1959) Kröger 2025	Isorthoceras saaremense	Isorthoceras saaremense (Balashov, 1959)	Balashov	1959	Kröger	2025			https://treatment.plazi.org/id/9326878396467017FE27FA98FBF7F903	
9326878396467017FE27FA98FBF7F903.taxon.syn1	Balashov Z. G. 1959. Nekotorye novye vidy nautiloidej ordovika, silura i devona SSSR. Materialy k " Osnovam paleontologii " 3: 37-46.	9326878396467017FE27FA98FBF7F903.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Baltoceratidae	Hedstroemoceras	species	Hedstroemoceras saaremense Balashov 1959	Balashov 1959	Hedstroemoceras saaremense	Hedstroemoceras saaremense Balashov, 1959: 42			Balashov	1959	synonym		https://treatment.plazi.org/id/9326878396467017FE27FA98FBF7F903	
9326878396477014FD5DF8B4FBCEFD1B.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Isorthoceras	species	Isorthoceras undefined-A		Isorthoceras undefined-A	Isorthoceras sp. A							https://treatment.plazi.org/id/9326878396477014FD5DF8B4FBCEFD1B	
9326878396447014FD5CFC9DFCFEFA0A.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Isorthoceras	species	Isorthoceras undefined-B		Isorthoceras undefined-B	Isorthoceras sp. B							https://treatment.plazi.org/id/9326878396447014FD5CFC9DFCFEFA0A	
9326878396447015FD5CF9AEFABFFE33.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Isorthoceras	species	Isorthoceras undefined-C		Isorthoceras undefined-C	Isorthoceras sp. C							https://treatment.plazi.org/id/9326878396447015FD5CF9AEFABFFE33	
9326878396457015FD5BFE43FC13FA19.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Isorthoceras	species	Isorthoceras undefined-D		Isorthoceras undefined-D	Isorthoceras sp. D							https://treatment.plazi.org/id/9326878396457015FD5BFE43FC13FA19	
9326878396457012FD5DF999FD93FE1B.taxon					Animalia	Mollusca	Cephalopoda	Orthocerida	Proteoceratidae	Isorthoceras	species	Isorthoceras undefined-E		Isorthoceras undefined-E	Isorthoceras sp. E							https://treatment.plazi.org/id/9326878396457012FD5DF999FD93FE1B	
9326878396427012FDB5FCC6FE9EFAA3.taxon					Animalia	Mollusca	Cephalopoda		Apsidoceratidae	Charactoceras	genus	Charactoceras Foerste 1924	Foerste 1924	Charactoceras	Charactoceras Foerste, 1924			Foerste	1924			https://treatment.plazi.org/id/9326878396427012FDB5FCC6FE9EFAA3	
9326878396427012FDDCFD9DFAD1FCF3.taxon					Animalia	Mollusca	Cephalopoda				subClass	Multiceratoidea Mutvei 2013	Mutvei 2013	Multiceratoidea	Multiceratoidea Mutvei, 2013			Mutvei	2013			https://treatment.plazi.org/id/9326878396427012FDDCFD9DFAD1FCF3	
9326878396427013FDC1FAD4FC1EF91D.taxon					Animalia	Mollusca	Cephalopoda		Apsidoceratidae	Charactoceras	species	Charactoceras estonicum Strand 1934	Strand 1934	Charactoceras estonicum	Charactoceras estonicum Strand, 1934			Strand	1934			https://treatment.plazi.org/id/9326878396427013FDC1FAD4FC1EF91D	
9326878396437011FD50F8A5FB27FC4C.taxon					Animalia	Mollusca	Cephalopoda		Apsidoceratidae	Charactoceras	species	Charactoceras undefined-A Strand 1934	Strand 1934	Charactoceras undefined-A	Charactoceras sp. A			Strand	1934			https://treatment.plazi.org/id/9326878396437011FD50F8A5FB27FC4C	
9326878396417011FD50FC68FD50F874.taxon					Animalia	Mollusca	Cephalopoda		Apsidoceratidae	Charactoceras	species	Charactoceras undefined-B Strand 1934	Strand 1934	Charactoceras undefined-B	Charactoceras sp. B			Strand	1934			https://treatment.plazi.org/id/9326878396417011FD50FC68FD50F874	
93268783964E701EFD53FEB0FB18FC36.taxon					Animalia	Mollusca	Cephalopoda		Apsidoceratidae	Charactoceras	species	Charactoceras undefined Foerste 1924	Foerste 1924	Charactoceras undefined	Charactoceras? sp.			Foerste	1924			https://treatment.plazi.org/id/93268783964E701EFD53FEB0FB18FC36	
93268783964E701EFD9CFC42FB3BF92E.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda		Uranoceratidae	Saxbyoceras	genus	Saxbyoceras Kröger 2025	Kröger 2025	Saxbyoceras	Saxbyoceras			Kröger	2025		gen. nov.	https://treatment.plazi.org/id/93268783964E701EFD9CFC42FB3BF92E	
93268783964E701CFDC6F94AFC44FAC7.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda		Uranoceratidae	Saxbyoceras	species	Saxbyoceras kingpooli Kröger 2025	Kröger 2025	Saxbyoceras kingpooli	Saxbyoceras kingpooli			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783964E701CFDC6F94AFC44FAC7	
93268783964C701CFDBAFA33FDF3F88A.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Danoceras	genus	Danoceras Troedsson 1926	Troedsson 1926	Danoceras	Danoceras Troedsson, 1926			Troedsson	1926			https://treatment.plazi.org/id/93268783964C701CFDBAFA33FDF3F88A	
93268783964D701DFD96FEB1FEEFFA93.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Danoceras	species	Danoceras breve Strand 1934	Strand 1934	Danoceras breve	Danoceras breve Strand, 1934			Strand	1934			https://treatment.plazi.org/id/93268783964D701DFD96FEB1FEEFFA93	
93268783964D701BFD9EFA24FD00FAC7.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Danoceras	species	Danoceras oviforme Kröger 2025	Kröger 2025	Danoceras oviforme	Danoceras oviforme			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783964D701BFD9EFA24FD00FAC7	
93268783964B7066FE1BFAF2FB30FA13.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Danoceras	species	Danoceras piersalense (Teichert 1930) Kröger 2025	(Teichert 1930) Kröger 2025	Danoceras piersalense	Danoceras piersalense (Teichert, 1930)	Teichert	1930	Kröger	2025			https://treatment.plazi.org/id/93268783964B7066FE1BFAF2FB30FA13	
9326878396367067FDA8F9A6FEEBFBFC.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Danoceras	species	Danoceras vohilaidense Kröger 2025	Kröger 2025	Danoceras vohilaidense	Danoceras vohilaidense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/9326878396367067FDA8F9A6FEEBFBFC	
9326878396377067FD48FBF9FCB7F870.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Danoceras	species	Danoceras undefined-A		Danoceras undefined-A	Danoceras sp. A							https://treatment.plazi.org/id/9326878396377067FD48FBF9FCB7F870	
9326878396347064FDA7FEB1FDA7FD34.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Diestoceras	genus	Diestoceras Foerste 1924	Foerste 1924	Diestoceras	Diestoceras Foerste, 1924			Foerste	1924			https://treatment.plazi.org/id/9326878396347064FDA7FEB1FDA7FD34	
9326878396347065FDDDFD40FC11FB61.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Diestoceras	species	Diestoceras stensioei (Troedsson 1926)	(Troedsson 1926)	Diestoceras stensioei	Diestoceras stensioei (Troedsson, 1926)	Troedsson	1926					https://treatment.plazi.org/id/9326878396347065FDDDFD40FC11FB61	
9326878396347065FDDDFD40FC11FB61.taxon.syn1		9326878396347065FDDDFD40FC11FB61.taxon			Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Cyrtogomphoceras	species	Cyrtogomphoceras stensioei Troedsson 1926	Troedsson 1926	Cyrtogomphoceras stensioei	Cyrtogomphoceras stensioei			Troedsson	1926	synonym		https://treatment.plazi.org/id/9326878396347065FDDDFD40FC11FB61	
9326878396347065FDDDFD40FC11FB61.taxon.syn2		9326878396347065FDDDFD40FC11FB61.taxon			Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Diestoceras	species	Diestoceras stoermeri Strand 1934	Strand 1934	Diestoceras stoermeri	Diestoceras stoermeri			Strand	1934	synonym		https://treatment.plazi.org/id/9326878396347065FDDDFD40FC11FB61	
9326878396357063FD43FB12FC37FC85.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Diestoceras	species	Diestoceras undefined-A		Diestoceras undefined-A	Diestoceras sp. A							https://treatment.plazi.org/id/9326878396357063FD43FB12FC37FC85	
9326878396337063FDCBFC3FFAFCF9E6.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Dowlingoceras	genus	Dowlingoceras Foerste 1928	Foerste 1928	Dowlingoceras	Dowlingoceras Foerste, 1928 d			Foerste	1928			https://treatment.plazi.org/id/9326878396337063FDCBFC3FFAFCF9E6	
9326878396337060FDDBF991FD57FB6B.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Dowlingoceras	species	Dowlingoceras kallholnense Frye 1987	Frye 1987	Dowlingoceras kallholnense	Dowlingoceras kallholnense Frye, 1987			Frye	1987			https://treatment.plazi.org/id/9326878396337060FDDBF991FD57FB6B	
9326878396307061FDA7FB0DFB8CFC2E.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Dowlingoceras	species	Dowlingoceras tornense Kröger 2025	Kröger 2025	Dowlingoceras tornense	Dowlingoceras tornense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/9326878396307061FDA7FB0DFB8CFC2E	
9326878396317061FD6EFC48FDACF97D.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Dowlingoceras	species	Dowlingoceras undefined-A		Dowlingoceras undefined-A	Dowlingoceras sp. A							https://treatment.plazi.org/id/9326878396317061FD6EFC48FDACF97D	
932687839631706EFD6DF905FBA8FCA5.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae	Dowlingoceras	species	Dowlingoceras undefined-B		Dowlingoceras undefined-B	Dowlingoceras sp. B							https://treatment.plazi.org/id/932687839631706EFD6DF905FBA8FCA5	
93268783963E706EFDA5FCDEFC99F958.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Diestoceratidae		family	Diestoceratidae Foerste 1926	Foerste 1926	Diestoceratidae	Diestoceratidae			Foerste	1926			https://treatment.plazi.org/id/93268783963E706EFDA5FCDEFC99F958	
93268783963E706FFD99F89EFD8FFD5B.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda		Uranoceratidae	Hiiumoceras	genus	Hiiumoceras Kröger 2025	Kröger 2025	Hiiumoceras	Hiiumoceras			Kröger	2025		gen. nov.	https://treatment.plazi.org/id/93268783963E706FFD99F89EFD8FFD5B	
93268783963F706DFDC9FD5DFB6CFE72.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda		Uranoceratidae	Hiiumoceras	species	Hiiumoceras hiiuense Kröger 2025	Kröger 2025	Hiiumoceras hiiuense	Hiiumoceras hiiuense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783963F706DFDC9FD5DFB6CFE72	
93268783963D706DFDB7FE07FBC2FCC6.taxon					Animalia	Mollusca	Cephalopoda		Graciloceratidae	Piersaloceras	genus	Piersaloceras Teichert 1930	Teichert 1930	Piersaloceras	Piersaloceras Teichert, 1930			Teichert	1930			https://treatment.plazi.org/id/93268783963D706DFDB7FE07FBC2FCC6	
93268783963A706AFDA1FC4CFDF1FA97.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Karoceratidae	Kallholnoceras	genus	Kallholnoceras Frye 1987	Frye 1987	Kallholnoceras	Kallholnoceras Frye, 1987			Frye	1987			https://treatment.plazi.org/id/93268783963A706AFDA1FC4CFDF1FA97	
93268783963B7069FDA2FD7CFAFDFEA3.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Beloitoceras	genus	Beloitoceras Foerste 1924	Foerste 1924	Beloitoceras	Beloitoceras Foerste, 1924			Foerste	1924			https://treatment.plazi.org/id/93268783963B7069FDA2FD7CFAFDFEA3	
9326878396397069FDBCFED2FCF3FA8D.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Beloitoceras	species	Beloitoceras siljanense Frye 1987	Frye 1987	Beloitoceras siljanense	Beloitoceras siljanense Frye, 1987			Frye	1987			https://treatment.plazi.org/id/9326878396397069FDBCFED2FCF3FA8D	
9326878396397077FDF6FA35FDCBFDD5.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Beloitoceras	species	Beloitoceras sinuososeptatum (Roemer 1861)	(Roemer 1861)	Beloitoceras sinuososeptatum	Beloitoceras sinuososeptatum (Roemer, 1861)	Roemer	1861					https://treatment.plazi.org/id/9326878396397077FDF6FA35FDCBFDD5	
9326878396397077FDF6FA35FDCBFDD5.taxon.syn1		9326878396397077FDF6FA35FDCBFDD5.taxon			Animalia	Mollusca	Cephalopoda	Orthocerida	Orthoceratidae	Orthoceras	species	Orthoceras sinuoso-septatum Roemer 1861	Roemer 1861	Orthoceras sinuoso-septatum	Orthoceras sinuoso-septatum			Roemer	1861	synonym		https://treatment.plazi.org/id/9326878396397077FDF6FA35FDCBFDD5	
9326878396397077FDF6FA35FDCBFDD5.taxon.syn2		9326878396397077FDF6FA35FDCBFDD5.taxon			Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Beloitoceras	species	Beloitoceras heterocurvatum Strand 1934	Strand 1934	Beloitoceras heterocurvatum	Beloitoceras heterocurvatum			Strand	1934	synonym		https://treatment.plazi.org/id/9326878396397077FDF6FA35FDCBFDD5	
9326878396397077FDF6FA35FDCBFDD5.taxon.syn3		9326878396397077FDF6FA35FDCBFDD5.taxon			Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Richardsonoceras	species	Richardsonoceras sinuososeptatum (Roemer 1861)	(Roemer 1861)	Richardsonoceras sinuososeptatum	Richardsonoceras sinuososeptatum	Roemer	1861			synonym		https://treatment.plazi.org/id/9326878396397077FDF6FA35FDCBFDD5	
9326878396277074FDF0FDEDFBF3FE76.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Beloitoceras	species	Beloitoceras sinuoseptatum (Roemer 1861)	(Roemer 1861)	Beloitoceras sinuoseptatum	Beloitoceras cf. sinuoseptatum (Roemer, 1861)	Roemer	1861					https://treatment.plazi.org/id/9326878396277074FDF0FDEDFBF3FE76	
9326878396247074FDBCFE00FABEF93D.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Beloitoceras	species	Beloitoceras uuemoisense Kröger 2025	Kröger 2025	Beloitoceras uuemoisense	Beloitoceras uuemoisense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/9326878396247074FDBCFE00FABEF93D	
9326878396247075FD56F944FCA2FCD8.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Beloitoceras	species	Beloitoceras undetermined Foerste 1924	Foerste 1924	Beloitoceras undetermined	Beloitoceras (?) sp.			Foerste	1924			https://treatment.plazi.org/id/9326878396247075FD56F944FCA2FCD8	
9326878396257075FDA0FCDCFD96FB03.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Cyrtorizoceras	genus	Cyrtorizoceras Hyatt 1900	Hyatt 1900	Cyrtorizoceras	Cyrtorizoceras Hyatt, 1900			Hyatt	1900			https://treatment.plazi.org/id/9326878396257075FDA0FCDCFD96FB03	
9326878396257072FDA9FAB5FE2CFD42.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Cyrtorizoceras	species	Cyrtorizoceras hariense Kröger 2025	Kröger 2025	Cyrtorizoceras hariense	Cyrtorizoceras hariense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/9326878396257072FDA9FAB5FE2CFD42	
9326878396227072FD51FD76FE5BF967.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Cyrtorizoceras	species	Cyrtorizoceras undefined-A		Cyrtorizoceras undefined-A	Cyrtorizoceras sp. A							https://treatment.plazi.org/id/9326878396227072FD51FD76FE5BF967	
9326878396227073FDBEF911FACBFE83.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Dalecarlioceras	genus	Dalecarlioceras Frye 1987	Frye 1987	Dalecarlioceras	Dalecarlioceras Frye, 1987			Frye	1987			https://treatment.plazi.org/id/9326878396227073FDBEF911FACBFE83	
9326878396237073FDB3FE33FC94F8E2.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Dalecarlioceras	species	Dalecarlioceras bodense Frye 1987	Frye 1987	Dalecarlioceras bodense	Dalecarlioceras bodense Frye, 1987			Frye	1987			https://treatment.plazi.org/id/9326878396237073FDB3FE33FC94F8E2	
9326878396237071FDDCF894FEE6FADC.taxon					Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Dalecarlioceras	species	Dalecarlioceras constrictum Frye 1987	Frye 1987	Dalecarlioceras constrictum	Dalecarlioceras constrictum Frye, 1987			Frye	1987			https://treatment.plazi.org/id/9326878396237071FDDCF894FEE6FADC	
93268783962E707EFDC0FE24FD2DFCA0.taxon					Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Richardsonoceras	genus	Richardsonoceras Foerste 1933	Foerste 1933	Richardsonoceras	Richardsonoceras Foerste, 1933			Foerste	1933			https://treatment.plazi.org/id/93268783962E707EFDC0FE24FD2DFCA0	
93268783962E707DFE3AFCD4FBCFFC98.taxon					Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Richardsonoceras	species	Richardsonoceras priscum (Eichwald 1860) Kröger 2025	(Eichwald 1860) Kröger 2025	Richardsonoceras priscum	Richardsonoceras priscum (Eichwald, 1860)	Eichwald	1860	Kröger	2025			https://treatment.plazi.org/id/93268783962E707DFE3AFCD4FBCFFC98	
93268783962E707DFE3AFCD4FBCFFC98.taxon.syn1		93268783962E707DFE3AFCD4FBCFFC98.taxon			Animalia	Mollusca	Cephalopoda		Hammatoceratidae	Cyrtoceras	species	Cyrtoceras priscum Eichwald 1860	Eichwald 1860	Cyrtoceras priscum	Cyrtoceras priscum			Eichwald	1860	synonym		https://treatment.plazi.org/id/93268783962E707DFE3AFCD4FBCFFC98	
93268783962E707DFE3AFCD4FBCFFC98.taxon.syn2		93268783962E707DFE3AFCD4FBCFFC98.taxon			Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Richardsonoceras	species	Richardsonoceras nikiforovae Balashov 1962	Balashov 1962	Richardsonoceras nikiforovae	Richardsonoceras nikiforovae			Balashov	1962	synonym		https://treatment.plazi.org/id/93268783962E707DFE3AFCD4FBCFFC98	
93268783962E707DFE3AFCD4FBCFFC98.taxon.syn3		93268783962E707DFE3AFCD4FBCFFC98.taxon			Animalia	Mollusca	Cephalopoda	Oncoceratida	Oonoceratidae	Oonoceras	species	Oonoceras priscum (Eichwald 1861)	(Eichwald 1861)	Oonoceras priscum	Oonoceras priscum	Eichwald	1861			synonym		https://treatment.plazi.org/id/93268783962E707DFE3AFCD4FBCFFC98	
93268783962D707DFD97FC19FAB6FB13.taxon					Animalia	Mollusca	Cephalopoda		Oncoceratidae	Rizosceras	genus	Rizosceras Hyatt 1884	Hyatt 1884	Rizosceras	Rizosceras Hyatt, 1884			Hyatt	1884			https://treatment.plazi.org/id/93268783962D707DFD97FC19FAB6FB13	
93268783962D707AFD78FAA3FDAFF9D3.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda		Oncoceratidae	Rizosceras	species	Rizosceras teres Kröger 2025	Kröger 2025	Rizosceras teres	Rizosceras teres			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783962D707AFD78FAA3FDAFF9D3	
93268783962A707BFDB4F926FB53FC83.taxon					Animalia	Mollusca	Cephalopoda		Apsidoceratidae	Deckeroceras	genus	Deckeroceras Foerste 1935	Foerste 1935	Deckeroceras	Deckeroceras Foerste, 1935 a			Foerste	1935			https://treatment.plazi.org/id/93268783962A707BFDB4F926FB53FC83	
93268783962B7079FDAEFC33FE41FEA1.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda		Apsidoceratidae	Deckeroceras	species	Deckeroceras balticum Kröger 2025	Kröger 2025	Deckeroceras balticum	Deckeroceras balticum			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783962B7079FDAEFC33FE41FEA1	
93268783962B7079FDAEFC33FE41FEA1.taxon.syn1		93268783962B7079FDAEFC33FE41FEA1.taxon			Animalia	Mollusca	Cephalopoda		Westonoceratidae	Winnipegoceras	species	Winnipegoceras undetermined		Winnipegoceras undetermined	Winnipegoceras sp.					synonym		https://treatment.plazi.org/id/93268783962B7079FDAEFC33FE41FEA1	
9326878396297079FDCFFE69FC22FCF4.taxon					Animalia	Mollusca	Cephalopoda		Ascoceratidae	Schuchertoceras	genus	Schuchertoceras Miller 1932	Miller 1932	Schuchertoceras	Schuchertoceras Miller, 1932			Miller	1932			https://treatment.plazi.org/id/9326878396297079FDCFFE69FC22FCF4	
9326878396297046FE3EFC80FBF4FA62.taxon					Animalia	Mollusca	Cephalopoda		Ascoceratidae	Schuchertoceras	species	Schuchertoceras deformis (Eichwald 1860) Kröger 2025	(Eichwald 1860) Kröger 2025	Schuchertoceras deformis	Schuchertoceras deformis (Eichwald, 1860)	Eichwald	1860	Kröger	2025			https://treatment.plazi.org/id/9326878396297046FE3EFC80FBF4FA62	
9326878396297046FE3EFC80FBF4FA62.taxon.syn1		9326878396297046FE3EFC80FBF4FA62.taxon			Animalia	Mollusca	Cephalopoda		Ascoceratidae	Ascoceras	species	Ascoceras deforme Eichwald 1860	Eichwald 1860	Ascoceras deforme	Ascoceras deforme			Eichwald	1860	synonym		https://treatment.plazi.org/id/9326878396297046FE3EFC80FBF4FA62	
9326878396297046FE3EFC80FBF4FA62.taxon.syn2		9326878396297046FE3EFC80FBF4FA62.taxon			Animalia	Mollusca	Cephalopoda		Ascoceratidae	Billingsites	species	Billingsites deformis (Eichwald 1860) Eichwald 1860	(Eichwald 1860) Eichwald 1860	Billingsites deformis	Billingsites deformis	Eichwald	1860	Eichwald	1860	synonym		https://treatment.plazi.org/id/9326878396297046FE3EFC80FBF4FA62	
9326878396167046FDB6FA48FD12F87F.taxon					Animalia	Mollusca	Cephalopoda		Probillingsitidae	Redpathoceras	genus	Redpathoceras Flower 1963	Flower 1963	Redpathoceras	Redpathoceras Flower, 1963			Flower	1963			https://treatment.plazi.org/id/9326878396167046FDB6FA48FD12F87F	
9326878396177045FDBFFEB0FD20FB9F.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda		Probillingsitidae	Redpathoceras	species	Redpathoceras saxbyense Kröger 2025	Kröger 2025	Redpathoceras saxbyense	Redpathoceras saxbyense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/9326878396177045FDBFFEB0FD20FB9F	
9326878396157045FDDBF9AFFC47F83C.taxon					Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Cyrtogomphoceras	genus	Cyrtogomphoceras Foerste 1924	Foerste 1924	Cyrtogomphoceras	Cyrtogomphoceras Foerste, 1924			Foerste	1924			https://treatment.plazi.org/id/9326878396157045FDDBF9AFFC47F83C	
9326878396157045FDFAFB58FBCCFA15.taxon					Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae		family	Cyrtogomphoceratidae Flower 1940	Flower 1940	Cyrtogomphoceratidae	Cyrtogomphoceratidae Flower, 1940			Flower	1940			https://treatment.plazi.org/id/9326878396157045FDFAFB58FBCCFA15	
9326878396127043FDFEFEB0FDE3FAC9.taxon					Animalia	Mollusca	Cephalopoda	Nautilida	Nautilidae	Cyrtogomphoceras	species	Cyrtogomphoceras troedssoni Teichert 1930	Teichert 1930	Cyrtogomphoceras troedssoni	Cyrtogomphoceras troedssoni Teichert, 1930			Teichert	1930			https://treatment.plazi.org/id/9326878396127043FDFEFEB0FDE3FAC9	
9326878396127043FDFEFEB0FDE3FAC9.taxon.syn1		9326878396127043FDFEFEB0FDE3FAC9.taxon			Animalia	Mollusca	Cephalopoda		Westonoceratidae	Faberoceras	species	Faberoceras troedssoni		Faberoceras troedssoni	Faberoceras troedssoni					synonym		https://treatment.plazi.org/id/9326878396127043FDFEFEB0FDE3FAC9	
9326878396137040FDA9FAECFB93FE1B.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae	Hosholmoceras	genus	Hosholmoceras Kröger 2025	Kröger 2025	Hosholmoceras	Hosholmoceras			Kröger	2025		gen. nov.	https://treatment.plazi.org/id/9326878396137040FDA9FAECFB93FE1B	
932687839610704EFDC9FD9CFC76FE1F.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae	Hosholmoceras	species	Hosholmoceras ovalis Kröger 2025	Kröger 2025	Hosholmoceras ovalis	Hosholmoceras ovalis			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/932687839610704EFDC9FD9CFC76FE1F	
93268783961E704EFDFCFD98FBF6F83E.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae	Hosholmoceras	species	Hosholmoceras triangulatum Kröger 2025	Kröger 2025	Hosholmoceras triangulatum	Hosholmoceras triangulatum			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783961E704EFDFCFD98FBF6F83E	
93268783961F704FFDA9FEB1FDCCF859.taxon					Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Kiaeroceras	genus	Kiaeroceras Strand 1934	Strand 1934	Kiaeroceras	Kiaeroceras Strand, 1934			Strand	1934			https://treatment.plazi.org/id/93268783961F704FFDA9FEB1FDCCF859	
93268783961C704DFD9DFEB1FC4AFBBC.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Kiaeroceras	species	Kiaeroceras kaebliki Kröger 2025	Kröger 2025	Kiaeroceras kaebliki	Kiaeroceras kaebliki			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783961C704DFD9DFEB1FC4AFBBC	
93268783961D704AFDB8FB38FEA3FB7E.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Kiaeroceras	species	Kiaeroceras ormsoense Strand 1934	Strand 1934	Kiaeroceras ormsoense	Kiaeroceras (?) ormsoense			Strand	1934		spec. nov.	https://treatment.plazi.org/id/93268783961D704AFDB8FB38FEA3FB7E	
93268783961A704AFD96FB7AFB22F837.taxon					Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Kiaeroceras	species	Kiaeroceras ormsoense Strand 1934	Strand 1934	Kiaeroceras ormsoense	Kiaeroceras (?) cf. ormsoense			Strand	1934			https://treatment.plazi.org/id/93268783961A704AFD96FB7AFB22F837	
93268783961B704BFD9DFEB1FB6FF8BC.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda		Protophragmoceratidae	Kiaeroceras	species	Kiaeroceras urgense Kröger 2025	Kröger 2025	Kiaeroceras urgense	Kiaeroceras urgense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783961B704BFD9DFEB1FB6FF8BC	
9326878396187048FD40FEB1FDE5FBD1.taxon					Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Kiaeroceras	species	Kiaeroceras undefined-A		Kiaeroceras undefined-A	Kiaeroceras sp. A							https://treatment.plazi.org/id/9326878396187048FD40FEB1FDE5FBD1	
9326878396187048FD5FFBE3FB8EF8E7.taxon					Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Kiaeroceras	species	Kiaeroceras undefined-B		Kiaeroceras undefined-B	Kiaeroceras sp. B							https://treatment.plazi.org/id/9326878396187048FD5FFBE3FB8EF8E7	
9326878396187049FD5FF891FE60FD5D.taxon					Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Kiaeroceras	species	Kiaeroceras undefined-C		Kiaeroceras undefined-C	Kiaeroceras sp. C							https://treatment.plazi.org/id/9326878396187049FD5FF891FE60FD5D	
9326878396197049FD5FFD67FAE4FB1F.taxon					Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Kiaeroceras	species	Kiaeroceras undefined-D		Kiaeroceras undefined-D	Kiaeroceras sp. D							https://treatment.plazi.org/id/9326878396197049FD5FFD67FAE4FB1F	
9326878396197056FD40FA98FD7FFE8C.taxon					Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Kiaeroceras	species	Kiaeroceras undefined-E		Kiaeroceras undefined-E	Kiaeroceras sp. E							https://treatment.plazi.org/id/9326878396197056FD40FA98FD7FFE8C	
9326878396067056FDC6FE29FB2FFAE3.taxon					Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Lyckholmoceras	genus	Lyckholmoceras Teichert 1930	Teichert 1930	Lyckholmoceras	Lyckholmoceras Teichert, 1930			Teichert	1930			https://treatment.plazi.org/id/9326878396067056FDC6FE29FB2FFAE3	
9326878396067054FDD9FA95FD2EFE12.taxon					Animalia	Mollusca	Cephalopoda		Cyrtogomphoceratidae	Lyckholmoceras	species	Lyckholmoceras norvegiae Strand 1934	Strand 1934	Lyckholmoceras norvegiae	Lyckholmoceras norvegiae Strand, 1934			Strand	1934			https://treatment.plazi.org/id/9326878396067054FDD9FA95FD2EFE12	
9326878396067054FDD9FA95FD2EFE12.taxon.syn1		9326878396067054FDD9FA95FD2EFE12.taxon			Animalia	Mollusca	Cephalopoda	Oncoceratida	Oncoceratidae	Beloitoceras	species	Beloitoceras heterocurvatum Strand 1934	Strand 1934	Beloitoceras heterocurvatum	Beloitoceras heterocurvatum			Strand	1934	synonym		https://treatment.plazi.org/id/9326878396067054FDD9FA95FD2EFE12	
9326878396067054FDD9FA95FD2EFE12.taxon.syn2		9326878396067054FDD9FA95FD2EFE12.taxon			Animalia	Mollusca	Cephalopoda		Protophragmoceratidae	Parryoceras	species	Parryoceras strandi Sweet 1959	Sweet 1959	Parryoceras strandi	Parryoceras strandi			Sweet	1959	synonym		https://treatment.plazi.org/id/9326878396067054FDD9FA95FD2EFE12	
9326878396047054FDBFFDA6FBBCFC2D.taxon					Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae	Strandoceras	genus	Strandoceras Flower 1946	Flower 1946	Strandoceras	Strandoceras Flower, 1946			Flower	1946			https://treatment.plazi.org/id/9326878396047054FDBFFDA6FBBCFC2D	
9326878396047052FDC8FC56FE66F953.taxon					Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae	Strandoceras	species	Strandoceras sphynx (Schmidt 1858)	(Schmidt 1858)	Strandoceras sphynx	Strandoceras sphynx (Schmidt, 1858)	Schmidt	1858					https://treatment.plazi.org/id/9326878396047052FDC8FC56FE66F953	
9326878396047052FDC8FC56FE66F953.taxon.syn1	Schmidt F. 1858. Untersuchungen uber die Silurische Formation von Ehstland, Nord-Livland und Osel. Archiv fur die Naturkunde Liv-, Ehst- und Kurlands, 1 Serie (Mineralogische Wissenschaften, nebst Chemie, Physik und Erdbeschreibung) 2: 1-248.	9326878396047052FDC8FC56FE66F953.taxon			Animalia	Mollusca	Cephalopoda		Phragmoceratidae	Phragmoceras	species	Phragmoceras sphynx Schmidt 1858	Schmidt 1858	Phragmoceras sphynx	Phragmoceras sphynx Schmidt, 1858: 200			Schmidt	1858	synonym		https://treatment.plazi.org/id/9326878396047052FDC8FC56FE66F953	
9326878396047052FDC8FC56FE66F953.taxon.syn2		9326878396047052FDC8FC56FE66F953.taxon			Animalia	Mollusca	Cephalopoda	Discosorida	Phragmoceratidae	Protophragmoceras	species	Protophragmoceras sphinx Schmidt 1858	Schmidt 1858	Protophragmoceras sphinx	Protophragmoceras sphinx			Schmidt	1858	synonym		https://treatment.plazi.org/id/9326878396047052FDC8FC56FE66F953	
9326878396027050FDA1F964FD48FCB7.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae	Strandoceras	species	Strandoceras kalevipoegi Kröger 2025	Kröger 2025	Strandoceras kalevipoegi	Strandoceras kalevipoegi			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/9326878396027050FDA1F964FD48FCB7	
932687839600705EFDACFCC1FE0BFEA2.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae	Strandoceras	species	Strandoceras kohilense Kröger 2025	Kröger 2025	Strandoceras kohilense	Strandoceras kohilense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/932687839600705EFDACFCC1FE0BFEA2	
93268783960E705FFD9FFED5FA8AFB99.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae	Strandoceras	species	Strandoceras muhvi Kröger 2025	Kröger 2025	Strandoceras muhvi	Strandoceras muhvi			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783960E705FFD9FFED5FA8AFB99	
93268783960F705CFDC1FB1BFAFCFB27.taxon					Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae	Strandoceras	species	Strandoceras schmidti (Teichert 1930)	(Teichert 1930)	Strandoceras schmidti	Strandoceras schmidti (Teichert, 1930)	Teichert	1930					https://treatment.plazi.org/id/93268783960F705CFDC1FB1BFAFCFB27	
93268783960F705CFDC1FB1BFAFCFB27.taxon.syn1	Teichert C. 1930. Die Cephalopoden-Fauna der Lyckholm-Stufe des Ostbaltikums. Palaontologische Zeitschrift 12: 264-312. https://doi.org/10.1007/BF03044452	93268783960F705CFDC1FB1BFAFCFB27.taxon			Animalia	Mollusca	Cephalopoda		Polyelasmoceratidae	Codoceras	species	Codoceras schmidti Teichert 1930	Teichert 1930	Codoceras schmidti	Codoceras schmidti Teichert, 1930: 297			Teichert	1930	synonym		https://treatment.plazi.org/id/93268783960F705CFDC1FB1BFAFCFB27	
93268783960C705DFDA2FB51FE4BF943.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Discosorida	Cyrtogomphoceratidae	Strandoceras	species	Strandoceras sulevipoegi Kröger 2025	Kröger 2025	Strandoceras sulevipoegi	Strandoceras sulevipoegi			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/93268783960C705DFDA2FB51FE4BF943	
93268783960D705AFDCEF975FCA6FC34.taxon					Animalia	Mollusca	Cephalopoda	Discosorida			species	undefined-A Flower 1950	Flower 1950	undefined-A	Discosorida			Flower	1950			https://treatment.plazi.org/id/93268783960D705AFDCEF975FCA6FC34	
93268783960A705BFDCDFC40FC1FFB99.taxon					Animalia	Mollusca	Cephalopoda	Discosorida			species	undefined-B Flower 1950	Flower 1950	undefined-B	Discosorida			Flower	1950			https://treatment.plazi.org/id/93268783960A705BFDCDFC40FC1FFB99	
93268783960B705BFDCDFB1BFDB4F851.taxon					Animalia	Mollusca	Cephalopoda	Discosorida			species	undefined-C Flower 1950	Flower 1950	undefined-C	Discosorida			Flower	1950			https://treatment.plazi.org/id/93268783960B705BFDCDFB1BFDB4F851	
9326878396087059FDCDFEB1FCBCFE83.taxon					Animalia	Mollusca	Cephalopoda	Discosorida			species	undefined-D Flower 1950	Flower 1950	undefined-D	Discosorida			Flower	1950			https://treatment.plazi.org/id/9326878396087059FDCDFEB1FCBCFE83	
93268783960970A6FDA0FE4AFAFCFBA6.taxon					Animalia	Mollusca	Cephalopoda	Tarphyceratida	Trocholitidae	Discoceras	genus	Discoceras Barrande 1867	Barrande 1867	Discoceras	Discoceras Barrande, 1867			Barrande	1867			https://treatment.plazi.org/id/93268783960970A6FDA0FE4AFAFCFBA6	
9326878396F670A5FDE1FBD2FB98FC01.taxon					Animalia	Mollusca	Cephalopoda	Tarphyceratida	Trocholitidae	Discoceras	species	Discoceras antiquissimum (Eichwald 1842)	(Eichwald 1842)	Discoceras antiquissimum	Discoceras antiquissimum (Eichwald, 1842)	Eichwald	1842					https://treatment.plazi.org/id/9326878396F670A5FDE1FBD2FB98FC01	
9326878396F670A5FDE1FBD2FB98FC01.taxon.syn1	Eichwald E. D. von 1840. Uber das silurische Schichtensystem in Esthland. Zeitschrift fur Naturwissenschaften und Heilkunde der Akademie St Petersburg 8: 1-327. https://doi.org/10.5962/bhl.title.150763	9326878396F670A5FDE1FBD2FB98FC01.taxon			Animalia	Mollusca	Cephalopoda		Clymeniidae	Clymenia	species	Clymenia antiquissima Eichwald 1840	Eichwald 1840	Clymenia antiquissima	Clymenia antiquissima Eichwald, 1840: 15			Eichwald	1840	synonym		https://treatment.plazi.org/id/9326878396F670A5FDE1FBD2FB98FC01	
9326878396F670A5FDE1FBD2FB98FC01.taxon.syn2	Lossen C. 1860. Uber einige Lituiten. Zeitschrift der deutschen geologischen Gesellschaft 12: 15-28. Available from https://www.biodiversitylibrary.org/page/34776055 [accessed 20 Jan. 2025].	9326878396F670A5FDE1FBD2FB98FC01.taxon			Animalia	Mollusca	Cephalopoda	Astroviida	Lituitidae	Lituites	species	Lituites trapezoidalis Lossen 1860	Lossen 1860	Lituites trapezoidalis	Lituites trapezoidalis Lossen, 1860: 25			Lossen	1860	synonym		https://treatment.plazi.org/id/9326878396F670A5FDE1FBD2FB98FC01	
9326878396F670A5FDE1FBD2FB98FC01.taxon.syn3		9326878396F670A5FDE1FBD2FB98FC01.taxon			Animalia	Mollusca	Cephalopoda	Astroviida	Lituitidae	Lituites	species	Lituites (Trocholites) antiquissimus Roemer 1861	Roemer 1861	Lituites (Trocholites) antiquissimus	Lituites (Trocholites) antiquissimus			Roemer	1861	synonym		https://treatment.plazi.org/id/9326878396F670A5FDE1FBD2FB98FC01	
9326878396F670A5FDE1FBD2FB98FC01.taxon.syn4	Strand T. 1934. The Upper Ordovician Cephalopods of the Oslo Area. Norsk geologiske Tidsskrift 14: 1-117.	9326878396F670A5FDE1FBD2FB98FC01.taxon			Animalia	Mollusca	Cephalopoda	Tarphyceratida	Discoceratidae	Discoceras	species	Discoceras roemeri Strand 1934	Strand 1934	Discoceras roemeri	Discoceras roemeri Strand, 1934			Strand	1934	synonym		https://treatment.plazi.org/id/9326878396F670A5FDE1FBD2FB98FC01	
9326878396F670A5FDE1FBD2FB98FC01.taxon.syn5		9326878396F670A5FDE1FBD2FB98FC01.taxon			Animalia	Mollusca	Cephalopoda	Tarphyceratida	Discoceratidae	Discoceras	species	Discoceras antiquissima (Eichwald 1842)	(Eichwald 1842)	Discoceras antiquissima	Discoceras antiquissima	Eichwald	1842			synonym		https://treatment.plazi.org/id/9326878396F670A5FDE1FBD2FB98FC01	
9326878396F570A1FD9BFBB2FE91FE69.taxon	Kröger, Björn (2025): The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978: 1-169, DOI: 10.5852/ejt.2025.978.2801, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2801/12801				Animalia	Mollusca	Cephalopoda	Tarphyceratida	Trocholitidae	Discoceras	species	Discoceras paopense Kröger 2025	Kröger 2025	Discoceras paopense	Discoceras paopense			Kröger	2025		spec. nov.	https://treatment.plazi.org/id/9326878396F570A1FD9BFBB2FE91FE69	
9326878396F170AAFDA6FE0CFE42FEA2.taxon					Animalia	Mollusca	Cephalopoda	Tarphyceratida	Trocholitidae	Discoceras	species	Discoceras roemeri Strand 1934	Strand 1934	Discoceras roemeri	Discoceras roemeri Strand, 1934			Strand	1934			https://treatment.plazi.org/id/9326878396F170AAFDA6FE0CFE42FEA2	
9326878396F170AAFDA6FE0CFE42FEA2.taxon.syn1	Stumbur H. A. 1956. O nautiloideah Kohilaskogo arusa (Verhnij Ordovik Pribaltiki). Tartu Riikliku Ulikooli Toimetised 42: 176-185.	9326878396F170AAFDA6FE0CFE42FEA2.taxon			Animalia	Mollusca	Cephalopoda		Trocholitidae	Schroederoceras	species	Schroederoceras balaschovi Stumbur 1956	Stumbur 1956	Schroederoceras balaschovi	Schroederoceras balaschovi Stumbur, 1956: 181			Stumbur	1956	synonym		https://treatment.plazi.org/id/9326878396F170AAFDA6FE0CFE42FEA2	
9326878396F170AAFDA6FE0CFE42FEA2.taxon.syn2		9326878396F170AAFDA6FE0CFE42FEA2.taxon			Animalia	Mollusca	Cephalopoda	Astroviida	Lituitidae	Lituites	species	Lituites antiquissimus Roemer 1861	Roemer 1861	Lituites antiquissimus	Lituites antiquissimus			Roemer	1861	synonym		https://treatment.plazi.org/id/9326878396F170AAFDA6FE0CFE42FEA2	
9326878396F170AAFDA6FE0CFE42FEA2.taxon.syn3		9326878396F170AAFDA6FE0CFE42FEA2.taxon			Animalia	Mollusca	Cephalopoda		Trocholitidae	Schroederoceras	species	Schroederoceras angulatum (Saemann 1852)	(Saemann 1852)	Schroederoceras angulatum	Schroederoceras angulatum	Saemann	1852			synonym		https://treatment.plazi.org/id/9326878396F170AAFDA6FE0CFE42FEA2	
9326878396F170AAFDA6FE0CFE42FEA2.taxon.syn4		9326878396F170AAFDA6FE0CFE42FEA2.taxon			Animalia	Mollusca	Cephalopoda	Tarphyceratida	Discoceratidae	Discoceras	species	Discoceras angulatum (Saemann 1853)	(Saemann 1853)	Discoceras angulatum	Discoceras angulatum	Saemann	1853			synonym		https://treatment.plazi.org/id/9326878396F170AAFDA6FE0CFE42FEA2	
9326878396F170AAFDA6FE0CFE42FEA2.taxon.syn5		9326878396F170AAFDA6FE0CFE42FEA2.taxon			Animalia	Mollusca	Cephalopoda		Trocholitidae	Schroederoceras	species	Schroederoceras roemeri Strand 1934	Strand 1934	Schroederoceras roemeri	Schroederoceras roemeri			Strand	1934	synonym		https://treatment.plazi.org/id/9326878396F170AAFDA6FE0CFE42FEA2	
9326878396F170AAFDA6FE0CFE42FEA2.taxon.syn6		9326878396F170AAFDA6FE0CFE42FEA2.taxon			Animalia	Mollusca	Cephalopoda		Tarphyceratidae	Rectanguloceras	species	Rectanguloceras balaschovi Strand 1934	Strand 1934	Rectanguloceras balaschovi	Rectanguloceras balaschovi			Strand	1934	synonym		https://treatment.plazi.org/id/9326878396F170AAFDA6FE0CFE42FEA2	
9326878396F170AAFDA6FE0CFE42FEA2.taxon.syn7		9326878396F170AAFDA6FE0CFE42FEA2.taxon			Animalia	Mollusca	Cephalopoda		Tarphyceratidae	Rectanguloceras	species	Rectanguloceras (Discoceras) roemeri		Rectanguloceras (Discoceras) roemeri	Rectanguloceras (Discoceras) cf. roemeri					synonym		https://treatment.plazi.org/id/9326878396F170AAFDA6FE0CFE42FEA2	
9326878396FA70A9FDB7FED5FAFCFD5A.taxon					Animalia	Mollusca	Cephalopoda	Tarphyceratida	Trocholitidae	Discoceras	species	Discoceras saemanni (Hyatt 1894)	(Hyatt 1894)	Discoceras saemanni	Discoceras saemanni (Hyatt, 1894)	Hyatt	1894					https://treatment.plazi.org/id/9326878396FA70A9FDB7FED5FAFCFD5A	
9326878396FA70A9FDB7FED5FAFCFD5A.taxon.syn1	Saemann L. 1853. Uber die Nautiliden. Palaeontographica 3: 121-167. Available from https://www.biodiversitylibrary.org/page/33098171 [accessed 20 Jan. 2025].	9326878396FA70A9FDB7FED5FAFCFD5A.taxon			Animalia	Mollusca	Cephalopoda	Astroviida	Lituitidae	Lituites	species	Lituites angulatus Saemann 1853	Saemann 1853	Lituites angulatus	Lituites angulatus Saemann, 1853: 166			Saemann	1853	synonym		https://treatment.plazi.org/id/9326878396FA70A9FDB7FED5FAFCFD5A	
9326878396FA70A9FDB7FED5FAFCFD5A.taxon.syn2	Foord A. H. 1891. Catalogue of the Fossil Cephalopoda in the British Museum (Natural History) Part 2, Containing the Remainder of the Suborder Nautiloidea, Consisting of the Families Lituitidae, Trochoceratidae, and Nautilidae, with a Supplement. British Museum, London. https://doi.org/10.5962/bhl.title.112429	9326878396FA70A9FDB7FED5FAFCFD5A.taxon			Animalia	Mollusca	Cephalopoda	Tarphyceratida	Trocholitidae	Trocholites	species	Trocholites undosus Foord 1891	Foord 1891	Trocholites undosus	Trocholites undosus Foord, 1891: 45			Foord	1891	synonym		https://treatment.plazi.org/id/9326878396FA70A9FDB7FED5FAFCFD5A	
9326878396FA70A9FDB7FED5FAFCFD5A.taxon.syn3	Hyatt A. 1894. Phylogeny of an acquired characteristic. Proceedings of the American Philosophical Society 32 (143): 349-647. https://doi.org/10.5962/bhl.title.59826	9326878396FA70A9FDB7FED5FAFCFD5A.taxon			Animalia	Mollusca	Cephalopoda		Trocholitidae	Schroederoceras	species	Schroederoceras saemanni Hyatt 1894	Hyatt 1894	Schroederoceras saemanni	Schroederoceras saemanni Hyatt, 1894: 462			Hyatt	1894	synonym		https://treatment.plazi.org/id/9326878396FA70A9FDB7FED5FAFCFD5A	
9326878396FA70A9FDB7FED5FAFCFD5A.taxon.syn4	Strand T. 1934. The Upper Ordovician Cephalopods of the Oslo Area. Norsk geologiske Tidsskrift 14: 1-117.	9326878396FA70A9FDB7FED5FAFCFD5A.taxon			Animalia	Mollusca	Cephalopoda	Tarphyceratida	Discoceratidae	Discoceras	species	Discoceras hyatti Strand 1934	Strand 1934	Discoceras hyatti	Discoceras hyatti Strand, 1934: 38 – 39			Strand	1934	synonym		https://treatment.plazi.org/id/9326878396FA70A9FDB7FED5FAFCFD5A	
9326878396FA70A9FDB7FED5FAFCFD5A.taxon.syn5		9326878396FA70A9FDB7FED5FAFCFD5A.taxon			Animalia	Mollusca	Cephalopoda	Tarphyceratida	Discoceratidae	Discoceras	species	Discoceras undetermined		Discoceras undetermined	Discoceras sp.					synonym		https://treatment.plazi.org/id/9326878396FA70A9FDB7FED5FAFCFD5A	
9326878396FA70A9FDB7FED5FAFCFD5A.taxon.syn6		9326878396FA70A9FDB7FED5FAFCFD5A.taxon			Animalia	Mollusca	Cephalopoda		Trocholitidae	Schroederoceras	species	Schroederoceras hyatti		Schroederoceras hyatti	Schroederoceras hyatti					synonym		https://treatment.plazi.org/id/9326878396FA70A9FDB7FED5FAFCFD5A	
9326878396F970A9FDB5FD5DFDF4F959.taxon					Animalia	Mollusca	Cephalopoda	Tarphyceratida	Trocholitidae		species	undefinedA		undefinedA	Multiceratoidea							https://treatment.plazi.org/id/9326878396F970A9FDB5FD5DFDF4F959	
9326878396F970B6FDB4F95BFAFDFD3E.taxon					Animalia	Mollusca	Cephalopoda	Tarphyceratida	Trocholitidae		species	undefinedB Mutvei 2013	Mutvei 2013	undefinedB	Multiceratoidea			Mutvei	2013			https://treatment.plazi.org/id/9326878396F970B6FDB4F95BFAFDFD3E	
9326878396E670B6FDB4FCBAFDA3F9D0.taxon					Animalia	Mollusca	Cephalopoda	Tarphyceratida	Trocholitidae		species	undefinedC Mutvei 2013	Mutvei 2013	undefinedC	Multiceratoidea			Mutvei	2013			https://treatment.plazi.org/id/9326878396E670B6FDB4FCBAFDA3F9D0	
