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Atheris mabuensis Atheris matildae Atheris squamigera (Hallowell, 1854) Adaverina acclinis | Adavere Stage Adaverina adaverensis | Adavere Stage Adelograptus divergens | Tremadocian Adelograptus tenellus | Tremadocian Aechmina acommunis | Llandovery Aechmina bovina | Upper Ordovician → Silurian Aechmina ciecerensis | Porkuni Stage Aechmina cornuta | Ludlow Aechmina groenwalli | Porkuni Stage Aechmina molengraaffi | Ludlow Aegiria norvegica | Raikküla Stage Aestiaspis viitaensis | Rootsiküla Stage → Paadla Stage Afanassiaspis porata | Pärnu Stage Agastograptus lawsoni | Wenlock Agerina erratica | Ahlintella linta | Jõhvi Substage Ahlintella marginata | Rakvere Stage → Pirgu Stage Ahlintella pseudofabuliformis | Ahtiella arenaria | Kunda Stage Ahtiella baltica | Kunda Stage Ahtiella jaanussoni | Kunda Stage Ahtiella lirata | Kunda Stage Ainoa maeruensis | Keila Stage Airina adducta | Oandu Stage → Rakvere Stage Airina airina | Pirgu Stage Airina amabilis | Airina cornuta | Keila Stage → Porkuni Stage Airina kuldigensis | Airina mezciemensis | Pirgu Stage Aitilia senecta | Juuru Stage → Raikküla Stage Aldanella kunda | Lower Cambrian (old nomenclature) Altha lata | lower Silurian Altha minima | lower Silurian Altha modesta | lower Silurian Aluverina multiporata | Idavere Substage Aluveroceras ievense | Jõhvi Substage Alveolella perplexa | Paadla Stage → Kuressaare Stage Alveolites suborbicularis | Ludfordian Alwynella ildjernensis | Aseri Stage → Uhaku Stage Alwynella intermedia | Uhaku Stage → Kukruse Stage Alwynella osloensis | Kukruse Stage Amaltheolepis baltica | Emsian Ambonychia incrassata | Vormsi Stage Ambonychia orvikui | Pirgu Stage → Porkuni Stage Amorphocystis esthoniae | Ordovician → Silurian Amorphognathus complicatus | Rakvere Stage Amorphognathus inaequalis | Kukruse Stage Amorphognathus ordovicicus | Nabala Stage → Porkuni Stage Amorphognathus superbus | Oandu Stage → Nabala Stage Amorphognathus tvaerensis | Kukruse Stage Amorphognathus ventilatus | Oandu Stage Amphistrophia (Amphistrophia) funiculata | Wenlock Amphistrophia podolica | Wenlock → Ludlow Amphitoxotis curvata | Ludlow Ampletochilina granifera | Vormsi Stage → Porkuni Stage Ampletochilina priscina | Ordovician Ampletochilina trapezoidea | Vormsi Stage → Pirgu Stage Amplexograptus baltoscandicus | Upper Ordovician Amplexograptus bekkeri | Upper Ordovician Amplexograptus fallax | Upper Ordovician Amplexograptus munimentus | Ordovician Amplexograptus tubulus | Ordovician Amplexopora angustiformis | Uhaku Stage → Kukruse Stage Amplexopora spinulosa | Keila Stage → Oandu Stage Amygdalella asylon | upper Silurian Amygdalella nasuta | Kaugatuma Stage → Ohesaare Stage Amygdalella paadlaensis | Paadla Stage Amygdalella solida | Kaugatuma Stage → Ohesaare Stage Amygdalella subclusa | Paadla Stage → Ohesaare Stage Anacaenaspis aff. gotlandensis | Adavere Stage Anacaenaspis gotlandensis | Ananaspis decora | Kuressaare Stage Anaphragma elegans | Nabala Stage Anaphragma exile | Rakvere Stage Anaphragma latviense | Katian Anaphragma mirabile | Nabala Stage → Pirgu Stage Anaphragma mirabile cognata | Keila Stage → Rakvere Stage Anaphragma originale | Oandu Stage Anaphragma rectum | Pirgu Stage Anaphragma verectum | Volkhov Stage Anaphragma vetustum | Volkhov Stage Anarchocrinus? rossicus | Upper Ordovician Anastrophia deflexa | Wenlock Anchigonites conulus | Kunda Stage Anchigonites heintzi | Kunda Stage Ancistroceras torelli | Uhaku Stage Ancistroceras undulatum | Uhaku Stage Ancora parovina | Keila Stage → Rakvere Stage Ancyrochitina ancyrea | Pirgu Stage → Jaagarahu Stage Ancyrochitina ansarviensis | Adavere Stage → Jaani Stage Ancyrochitina bifurcaspina | Juuru Stage → Raikküla Stage Ancyrochitina brevispinosa | Paadla Stage → Kuressaare Stage Ancyrochitina clathrospinosa | Jaani Stage → Jaagarahu Stage Ancyrochitina convexa | Raikküla Stage Ancyrochitina diabolus | Paadla Stage → Kuressaare Stage Ancyrochitina digitata | Jaani Stage Ancyrochitina fragilis | Kaugatuma Stage Ancyrochitina gutnica | Jaagarahu Stage → Paadla Stage Ancyrochitina laevaensis | Juuru Stage Ancyrochitina mullinsi | Adavere Stage Ancyrochitina paulaspina | Jaani Stage → Jaagarahu Stage Ancyrochitina pedavis | Kuressaare Stage → Kaugatuma Stage Ancyrochitina plurispinosa | Jaagarahu Stage Ancyrochitina porrectaspina | Adavere Stage → Jaani Stage Ancyrochitina primitiva | Adavere Stage → Kaugatuma Stage Ancyrochitina ramosaspina | Raikküla Stage Ancyrochitina rumbaensis | Adavere Stage Ancyrochitina tomentosa | Kaugatuma Stage Ancyrochitina vikiensis | Adavere Stage → Jaani Stage Andreolepis hedei | Ludlow Anechophragma rarum | Darriwilian Angochitina ambrosi | Paadla Stage Angochitina capillata | Oandu Stage → Pirgu Stage Angochitina ceratophora | Kuressaare Stage → Kaugatuma Stage Angochitina crassispina | Paadla Stage Angochitina curvata | Haljala Stage Angochitina echinata | Paadla Stage → Kuressaare Stage Angochitina elongata | Paadla Stage Angochitina filosa | Kaugatuma Stage Angochitina hansonica | Adavere Stage Angochitina lebaica | Kaugatuma Stage Angochitina longicollis | Adavere Stage → Jaani Stage Angochitina multiplex | Keila Stage → Oandu Stage Angochitina paucispinosa | Kuressaare Stage Angopora hisingeri | Llandovery → Wenlock Angopora parva | Llandovery → Wenlock Angopora tenuicula | Jaani Stage Angulotreta postapicalis | Upper Cambrian (old nomenclature) Angusticardinia recta | Hunneberg Stage Angusticardinia striata | Hunneberg Stage Anisocrinus interradiatus | upper Silurian Anisophyllum lindströmi | Silurian Anisopleurella karina | Haljala Stage → Keila Stage Anisotrypa callosa | Přidoli → Lower Devonian Anisotrypa proavus | Přidoli Annunziopora foordi | Kukruse Stage Annunziopora ovulum | Ordovician Anolotichia impolita | Kukruse Stage Anolotichiina crassimuralis | Jõhvi Substage → Oandu Stage Anolotichiina laciniatus | Kukruse Stage Anolotichiina tabulatiformis | Idavere Substage → Oandu Stage Anomalotoechus malinovetskensis | Ludlow → Přidoli Anthinocrinus luchi | Kaugatuma Stage Anthoceras vaginatum | Kunda Stage Anthochitina primula | Adavere Stage Anticalyptraea calyptrata | Ludlow → Přidoli Antigonambonites aequistriatus | Kunda Stage Antigonambonites anna | Volkhov Stage Antigonambonites costatus | Volkhov Stage Antigonambonites mäekülaensis | Volkhov Stage Antigonambonites planus | Volkhov Stage Antigonambonites soror | Volkhov Stage Antigonambonites sulcatus | Volkhov Stage Antirhynchonella linguifera | Jaani Stage → Jaagarahu Stage Aostipora cystata | Uhaku Stage → Keila Stage Aostipora kuckersiana | Kukruse Stage → Jõhvi Substage Apalolepis brotzeni | Lochkovian Apalolepis obruchevi | Lochkovian Aparchites brachynotos | Rakvere Stage → Porkuni Stage Aparchites kaugatumus | Aparchites saaremeisus | Apatobolbina gutnica | Jaani Stage Apatobolbina platygaster | Llandovery Apatobolbina simplicidorsata | Adavere Stage Apatobolbina tricuspidata | Adavere Stage Apatobolus plicatus | Ordovician Apatochilina falacata | Porkuni Stage Apatochilina ubjaensis | Kukruse Stage Apatokephalus dactylotypos | Apatokephalus dubius | Apatokephalus sarculum | Apatokephalus serratus | Apatorthis inflata | Keila Stage → Oandu Stage Apatorthis jugata | Lasnamägi Stage Apatorthis punctata | Jõhvi Substage → Keila Stage Apatorthis tenuicosta | Jõhvi Substage → Keila Stage Apatorthis ultima | Pirgu Stage Apheoorthina daunus | Billingen Stage Apianurus kuckersianus | Apiastrum unicum | Vormsi Stage Apomatella ingrica | Volkhov Stage Apomatella secunda | Volkhov Stage Apycnodiscus insularis | Wenlock Arachnophyllum diffluens | Adavere Stage Arachnophyllum murchisoni | Silurian Araeopoma elongatum | Llandovery → Wenlock Araeopoma prismaticum | Silurian Araneograptus murrayi | Lower Ordovician Araneosustroma stelliparratum | Wenlock → Ludlow Arcanopora disticha | Ordovician → Devonian Arcanopora obscura | Raikküla Stage Arcanopora plumula | Upper Ordovician Arcanopora strigosa | Porkuni Stage Arcanopora wimani | Hirnantian Archaeacanthus quadrisulcatus | Narva Stage → Gauja Stage Archaefenestella mobergi | Llandovery → Wenlock Archaegocystis granulata | Katian → Hirnantian Archaeofenestella rigidula | Llandovery → Wenlock Archaeoscyphia annulata | Archaeoscyphia aulocopiformis | Archaeoscyphia gislei | Archaeoscyphia minganensis | Archaeoscyphia rectilinearis | Archaeoscyphia scalaria | Archaeotinodes igneuspauper | Eocene Archaeotinodes ivanovi | Eocene Archaeotinodes pauper | Eocene Archegonaspis schmidti | Ludlow → Přidoli Archigeisonoceras folkeslundense | Lasnamägi Stage Archigeisonoceras picus | Volkhov Stage Archigeisonoceras repplingense | Volkhov Stage Archinacella media | Kunda Stage Archinacella rostrata | Nabala Stage → Vormsi Stage Archiretiolites regimontanus | Arcuaria caudalis | Llandovery Arcuaria cornuta | lower Silurian Arcuaria curta | Wenlock Arcuaria monoclivula | Jõhvi Substage Arcuaria sineclivula | Middle Ordovician → lower Silurian Arcuaria triangulata | Jaani Stage Ardenita kriukensis | Ardennea nearda | Keila Stage → Oandu Stage Arenaceacanthus arcuatacanalis | Paadla Stage → Kaugatuma Stage Arienigraptus zheijangensis | Arionoceras lotskirkense | Aseri Stage → Lasnamägi Stage Aristerella nitiduloides | Kukruse Stage Aristerella silurica | Lasnamägi Stage → Uhaku Stage Armoricochitina granulifera | Haljala Stage Armoricochitina reticulifera | Nabala Stage Arpaschmidtella abnormis | Rakvere Stage → Porkuni Stage Arthroclema armatum | Volkhov Stage Arthroclema vescum | Uhaku Stage Arthrostyloecia nitida | Ordovician Arthrostylus conjunctus | Keila Stage → Oandu Stage Arthrostylus obliquus | Aseri Stage → Uhaku Stage Artificiosocrinus artificiosus | Volkhov Stage → Kunda Stage Asaphus broeggeri | Vääna Substage Asaphus expansus | Kunda Stage Asaphus kowalewskii | Asaphus lepidurus | Langevoja Substage Asaphus raniceps | Kunda Stage Ascetopeltis kertelensis | Vormsi Stage Asericrinus aseriensis | Aseri Stage Asmussia membranacea | Frasnian Aspelundia expansa | Raikküla Stage Aspelundia fluegeli | Raikküla Stage Aspelundia fluegeli fluegeli | Raikküla Stage Asperellacystis asperellus | Oandu Stage Asperellacystis plicatus | Oandu Stage Asperopora aspera | Jaagarahu Stage Asperopora crustulenta | Hirnantian Asperopora explanata | Wenlock → Ludlow Asperopora multiporum | Jaani Stage → Jaagarahu Stage Asperopora ramosa | Wenlock Asteroblastus foveolatus | Kunda Stage Asteroblastus regularis | Lower Ordovician Asteroblastus sublaevis | Kunda Stage Asteroblastus volborthi | Kunda Stage Asterocrinus münsteri | Kunda Stage Asterocystis globulus | Asterocystis tuberculatus | Kunda Stage Asterolepis essica | Burtnieki Stage Asterolepis estonica | Narva Stage → Aruküla Stage Asterolepis ornata | Gauja Stage Asterolepis radiata | Amata Stage Asteusloffia acuta | Volkhov Stage → Kunda Stage Astraeospongium patina | Astrovidictya hamatis | Vormsi Stage Astrovidictya sparsa | Idavere Substage → Keila Stage Astroviella antiqua | Vormsi Stage Astroviella borstshovensis | Přidoli → Lower Devonian Astroviella insolensis | Ludlow → Přidoli Astroviella porosa | Kaugatuma Stage → Ohesaare Stage Astroviella pulwenensis | Ludlow Astroviella rara | Přidoli Astroviella silurica | Ludlow → Přidoli Astroviella vulgaris | Přidoli Astroviellina mukhovetskensis | Přidoli Asymmetrella prenaiensis | Wenlock Atactoporella baltica | Idavere Substage → Keila Stage Atactoporella crassa | Keila Stage → Oandu Stage Atactoporella schucherti | Vormsi Stage Atavograptus atavus | Llandovery Atavograptus strachani | Llandovery Ateleaspis tessellata | Wenlock → Ludlow Atractopyge errans | Rakvere Stage Atractopyge kutorgae | Jõhvi Substage → Rakvere Stage Atractopyge vardiana | Pirgu Stage Atractopyge woerthi | Atractopyge xipheres | Kukruse Stage Atraktoprion cornutus | Atraktoprion major | Atraktoprion mirabilis | Atrypa (Atrypa) dzwinogrodensis | Adavere Stage → Jaagarahu Stage Atrypa (Atrypa) reticularis | Atrypina (Atrypina) barrandii | Wenlock Atrypoidea (Atrypoidea) prunum | Kuressaare Stage Atrypoidea (Atrypoidea) saaremaaensis | Kuressaare Stage Aulacognathus kuehni | Aulacophyllum angelini | Silurian Aulacophyllum linnarssoni | Aulacophyllum mitratum | Silurian Aulacophyllum obliquum | Aulacopsis simplex | Kunda Stage Aulocopella cepa | Aulocopella dactylos | Pirgu Stage Aulocopella hemisphaericum | Aulocopium discus | Idavere Substage Aulograptus cucullus | Kunda Stage Aulonotreta antiquissima | Aulopora amica | Ludlow Aulopora assueta | Adavere Stage Aulopora celsa | Adavere Stage Aulopora enodis | Jaagarahu Stage Aulopora necopina | Kaugatuma Stage Autoloxolichas sanctae-mathiasae | Aviacypris avia | Aviacypris coartata | Upper Ordovician Aviacypris planata | Upper Ordovician Aviacypris truncata | Upper Ordovician Azygograptus eivionicus | Ordovician Azygograptus ellesi | Ordovician Azygograptus groenwalli | Ordovician Azygograptus hicksii | Ordovician Azygograptus lapworthi | Ordovician Azygograptus minutus | Ordovician Azygograptus suecicus | Ordovician Azygograptus validus | Ordovician Babanicrinus kegelensis | Idavere Substage → Keila Stage Babanicrinus pentaporus | Kunda Stage Babinocystis dilabidus | Volkhov Stage Bactropora solida | Hirnantian Bactrotheca dens | Uhaku Stage Bactrotheca quadrangularis | Ordovician Baerocrinus parvus | Lower Ordovician Baerocrinus ungerni | Uhaku Stage → Kukruse Stage Bairdia iocus | Vormsi Stage → Porkuni Stage Bairdia micra | Kukruse Stage Bairdiacypris venustus | Ludlow Bairdiocypris berounensis | Llandovery → Ludlow Bairdiocypris confinis | Llandovery Bairdiocypris gotlandica | Llandovery Bairdiocypris indeterminatus | Upper Ordovician → lower Silurian Bairdiocypris longus | Wenlock Bairdiocypris phillipsianus | Silurian Balticaspis latvica | Eiffelian Balticella binodis | Jõhvi Substage Balticopora tenuimurale | Keila Stage → Rakvere Stage Balticoporella glabra | Keila Stage → Oandu Stage Baltochitina delicata | Aseri Stage Baltochitina nolvaki | Lasnamägi Stage Baltocrinus antiquus | Lasnamägi Stage → Oandu Stage Baltocrinus balticus | Kunda Stage Baltocrinus hrevicaensis | Jõhvi Substage Baltocrinus lobatus | Uhaku Stage → Jõhvi Substage Baltocrinus quttaeformis | Jõhvi Substage Baltocrinus rostovensis | Kukruse Stage Baltocrinus serratus | Uhaku Stage Baltocyamus primarius | Oandu Stage Baltograptus extremus | Lower Ordovician Baltograptus geometricus | Lower Ordovician Baltograptus kurcki | Lower Ordovician Baltograptus minutus | Lower Ordovician Baltoniodus alobatus | Haljala Stage Baltoniodus gerdae | Kukruse Stage → Haljala Stage Baltoniodus medius | Volkhov Stage → Kunda Stage Baltoniodus navis | Volkhov Stage Baltoniodus norrlandicus | Volkhov Stage Baltoniodus prevariabilis | Aseri Stage → Uhaku Stage Baltoniodus triangularis | Volkhov Stage Baltoniodus variabilis | Uhaku Stage → Kukruse Stage Baltonotella kiesowii | Porkuni Stage Baltonotella kuckersiana | Kukruse Stage → Idavere Substage Baltonotella ledaia | Rakvere Stage → Pirgu Stage Baltonotella limbata | Oandu Stage → Porkuni Stage Baltonotella marginata | Nabala Stage → Vormsi Stage Baltonotella mistica | Rakvere Stage → Porkuni Stage Baltonotella semenformis | Idavere Substage → Jõhvi Substage Baltoplacognathus reclinatus | Lasnamägi Stage Baltoplacognathus robustus | Uhaku Stage Barbarorthis foraminifera | Pirgu Stage Barbarorthis porkuniensis | Porkuni Stage Barrandeocrinus sceptrum | Wenlock Barrandeograptus bornholmensis | Silurian Barrandeograptus gracilis | Llandovery Barrandeograptus pulchellus | Llandovery → Wenlock Barrandeolites bowerbanki | Jaagarahu Stage Barrandeolites lichenarioides | Jaani Stage → Jaagarahu Stage Bassetella alata | Haljala Stage Bassetella gracilis | Haljala Stage Bathmoceras linnarssoni | Kunda Stage Batostoma amplum | Oandu Stage → Vormsi Stage Batostoma cumingsi | Nabala Stage → Vormsi Stage Batostoma fertile | Aseri Stage → Uhaku Stage Batostoma fertile circulare | Aseri Stage → Uhaku Stage Batostoma gracilis | Hirnantian Batostoma granulosum | Idavere Substage → Keila Stage Batostoma magnopora | Keila Stage → Oandu Stage Batostoma scanicum | Paadla Stage → Kuressaare Stage Batostoma singulare | Rakvere Stage Batostoma speciosum | Oandu Stage → Rakvere Stage Batostoma subgranulosum | Idavere Substage Batostoma varians | Ordovician Beecherellita ordovica | Idavere Substage Bekkerina anijana | Haljala Stage Bekkerina assatkini | Haljala Stage Bekkerina dorsata | Kukruse Stage Bekkerina grandis | Keila Stage Bekkerina raricostellata | Belodina confluens | Rakvere Stage → Porkuni Stage Beloitoceras estonicum | Vormsi Stage Beloitoceras siljaense | Katian Beloitoceras sinuososeptatum | Vormsi Stage → Pirgu Stage Belonechitina aspera | Juuru Stage → Raikküla Stage Belonechitina cactacea | Lasnamägi Stage → Vormsi Stage Belonechitina capitata | Uhaku Stage → Rakvere Stage Belonechitina comma | Uhaku Stage → Nabala Stage Belonechitina crinita | Kunda Stage → Uhaku Stage Belonechitina gamachiana | Porkuni Stage Belonechitina granosa | Paadla Stage → Kuressaare Stage Belonechitina hirsuta | Haljala Stage Belonechitina jaanussonii | Haljala Stage Belonechitina latifrons | Paadla Stage Belonechitina meifodensis | Adavere Stage Belonechitina micracantha | Lasnamägi Stage → Porkuni Stage Belonechitina oeselensis | Adavere Stage → Jaani Stage Belonechitina pellifera | Lasnamägi Stage → Uhaku Stage Belonechitina postrobusta | Juuru Stage Belonechitina robusta | Haljala Stage → Nabala Stage Belonechitina synclinalis | Lasnamägi Stage → Vormsi Stage Belonechitina villosa | Oandu Stage → Vormsi Stage Belonechitina wesenbergensis brevis | Rakvere Stage → Pirgu Stage Belonechitina wesenbergensis elongata | Nabala Stage → Pirgu Stage Belorussipora arborea | Keila Stage Bentoceras rubeli | Kunda Stage Berolinella praevia | Paadla Stage Berolinella steusloffi | Ohesaare Stage Beyrichia (Altibeyrichia) contracta | Wenlock Beyrichia (Asperibeyrichia) valguensis | Adavere Stage Beyrichia (Beyrichia) bicuspis | Jaani Stage Beyrichia (Beyrichia) dactyloscopia | Silurian Beyrichia (Beyrichia) eteliana | Silurian Beyrichia (Beyrichia) grogarniana | Paadla Stage Beyrichia (Beyrichia) halliana | Adavere Stage → Jaani Stage Beyrichia (Beyrichia) hellviensis | Jaagarahu Stage Beyrichia (Beyrichia) kloedeni | Adavere Stage → Jaani Stage Beyrichia (Beyrichia) ponderosa | Silurian Beyrichia (Beyrichia) protuberans | Ludlow Beyrichia (Beyrichia) snoderiana | Ludlow Beyrichia (Beyrichia) subornata | Jaagarahu Stage Beyrichia (Beyrichia) suurikuensis | Jaani Stage Beyrichia (Beyrichia) tagalaensis | Beyrichia (Beyrichia) ultima | Adavere Stage Beyrichia (Simplicibeyrichia) aluksnensis | Wenlock Beyrichia (Simplicibeyrichia) globifera | Paadla Stage → Kaugatuma Stage Beyrichia (Simplicibeyrichia) impersonalis | Kaugatuma Stage Beyrichia (Simplicibeyrichia) venusta | Kaugatuma Stage Beyrichona tinea | Lower Cambrian (old nomenclature) Bicarinatina acuta | Narva Stage Bicarinatina borchi | Narva Stage → Aruküla Stage Bicarinatina gulbenensis | Aruküla Stage Bicarinatina livica | Narva Stage → Burtnieki Stage Bicarinatina rozenshteini | Narva Stage → Aruküla Stage Bicarinatina sakalana | Narva Stage Bicarinatina scaphulata | Narva Stage Bicarinatina ugalana | Aruküla Stage Bichilina prima | Bienvillia angelini | Tremadocian Bienvillia tetragonalis | Tremadocian Bienvillia tetragonalis broeggeri | Bienvillia wimani | Tremadocian Bighornia orvikui | Upper Ordovician Bilobia indentata | Bilobia musca | Kukruse Stage → Haljala Stage Bimuria (Bimuria) peregrina | Kukruse Stage → Idavere Substage Bimuropora winchelli | Jõhvi Substage → Rakvere Stage Bingeria cyamoides | Adavere Stage Bingeria pristina | Raikküla Stage Bingeria vesikuensis | Jaagarahu Stage Birdsalella cornuta | Wenlock Birdsalella varians | Ludlow Birkenia robusta | Rootsiküla Stage Biseptata briani | Kunda Stage Blastocystis rossica | Kunda Stage Bodacrinus columnus | Katian Bodoceras torticoni | Upper Ordovician Bodophyllum duncanae | Upper Ordovician Bodophyllum euthum | Upper Ordovician Bodophyllum oilense | Upper Ordovician Bodophyllum osmundense | Upper Ordovician Bodywskites fistulatus | Vormsi Stage Bodywskites magniporus | Kukruse Stage → Jõhvi Substage Boeckaspis hirsuta | Tremadocian Boeckaspis mobergi | Tremadocian Boedaspis solis | Kunda Stage Bohemograptus cornutus | Ludlow Bohemograptus praecornutus | Bohemograptus tenuis | Ludlow Bolbibollia estona | Raikküla Stage Bolbihithis abdominalis | Keila Stage → Oandu Stage Bolbihithis altonodus | Idavere Substage → Jõhvi Substage Bolbihithis olbinis | Rakvere Stage Bolbihithis superus | Rakvere Stage → Pirgu Stage Bolbina crassa | Kunda Stage Bolbina excessa | Nabala Stage → Pirgu Stage Bolbina kuckersiana | Kukruse Stage Bolbina latimarginata | Uhaku Stage → Kukruse Stage Bolbina lehtmetsaensis | Keila Stage Bolbina major | Keila Stage → Vormsi Stage Bolbina ornata | Oandu Stage Bolbina plicata | Rakvere Stage → Nabala Stage Bolbina rakverensis | Oandu Stage → Vormsi Stage Bolbina saxbya | Rakvere Stage → Porkuni Stage Bolbina valensis | Pirgu Stage Bolbina? globosa | Nabala Stage → Pirgu Stage Bolbiprimitia inaequalis | Jaagarahu Stage Bolbiprimitia tamsaluensis | Juuru Stage → Raikküla Stage Bolboporites (Ambliporites) lamanskii | Kunda Stage Bolboporites (Ambliporites) regnelli | Aseri Stage → Uhaku Stage Bolboporites (Ambliporites) semiglobosus | Volkhov Stage → Kunda Stage Bolboporites (Ambliporites) triangularis | Volkhov Stage → Kunda Stage Bolboporites (Bolboporites) elongatus | Volkhov Stage Bolboporites (Bolboporites) fungiformis | Kunda Stage → Aseri Stage Bolboporites (Bolboporites) mitralis | Volkhov Stage → Kunda Stage Bolboporites (Bolboporites) uncinatus | Volkhov Stage → Kunda Stage Bolboporites (Bolboporites) yeltishevae | Volkhov Stage Bolboporites (Stelloporites) stellifer | Aseri Stage Bollia amabilis | Raikküla Stage → Jaagarahu Stage Bollia distincta | upper Silurian Bollia mezmalensis | Porkuni Stage Bollia mezvagarensis | Porkuni Stage Bollia parva | Ludlow Bollia saarameisaiensis | Kaugatuma Stage Boreadorthis crassa | Vormsi Stage → Pirgu Stage Boreadorthis recula | Nabala Stage → Vormsi Stage Boreadorthis sadewitzensis | Rakvere Stage → Porkuni Stage Borealis borealis | Borealis borealis borealis | Juuru Stage Borealis borealis osloensis | Borealis pumilus | Raikküla Stage Borealis samojedicus | Silurian Borelasma crassitangens | Upper Ordovician Bornholmaspis praecursor | Borussulus reticulifer | Ludlow Borussulus squamosus | Ludlow Botellusoceras torpense | Lasnamägi Stage Bothriocidaris eichwaldi | Pirgu Stage Bothriocidaris globulus | Pirgu Stage Bothriocidaris pahleni | Jõhvi Substage Bothriocidaris parvus | Vormsi Stage Bothriolepis cellulosa | Amata Stage → Plavinas Stage Bothriolepis ciecere | Upper Devonian Bothriolepis evaldi | Bothriolepis heckeri | Bothriolepis jani | Bothriolepis leptocheira | Bothriolepis maxsima | Bothriolepis obrutschewi | Amata Stage Bothriolepis ornata | Bothriolepis panderi | Bothriolepis prima | Amata Stage Bothriolepis traudscholdi | Botryocrinus cucurbitaceus | Silurian Botryocrinus ramosissimus | upper Silurian Boucotinskia sulcata | Silurian Boucotspira carinifer | Vormsi Stage → Pirgu Stage Brachyelasma concamerata | Upper Ordovician Brachyelasma concava | Oandu Stage Brachyelasma cylindricum | Keila Stage → Oandu Stage Brachyelasma duncani | Pirgu Stage → Porkuni Stage Brachyelasma estonicum | Juuru Stage Brachyelasma fervida | Oandu Stage Brachyelasma hiumica | Vormsi Stage Brachyelasma oanduensis | Keila Stage → Oandu Stage Brachyelasma primum | Pirgu Stage Brachyelasma undulatum | Upper Ordovician Brachyopterella pentagonalis | Wenlock Brachyprion (Erinostrophia) walmstedti | Silurian Brachyprion ? kurzemensis | Ludlow Brachytomaria baltica | Jõhvi Substage → Rakvere Stage Brachytomaria nodulosa | Nabala Stage → Pirgu Stage Brachytomaria plautini | Kunda Stage Brachytomaria plicifera | Vormsi Stage → Pirgu Stage Braderupia asymmetrica | Kukruse Stage → Keila Stage Bradoria? estonica | Dominopol Stage Brevibolbina amabilis | Kukruse Stage → Keila Stage Brevibolbina dimorpha | Middle Ordovician → Upper Ordovician Brevibolbina dimorpha altonodosa | Vormsi Stage → Pirgu Stage Brevibolbina dimorpha dimorpha | Oandu Stage → Nabala Stage Brevibolbina fissurata | Pirgu Stage Brevibolbina pontificans | Pirgu Stage Brevibolbina porkuniensis | Porkuni Stage Brevidorsa brevidorsata | Kaugatuma Stage Brevidorsa ledaia | Rakvere Stage → Pirgu Stage Brevidorsa limbata | Oandu Stage → Pirgu Stage Brevidorsa sarvi | Upper Ordovician → Llandovery Brevidorsa subtilispinosa | Brevilamnulella kjerulfi | Hirnantian Brevilamnulella thebesensis | Hirnantian Brezelina angustolobata | Billingen Stage → Volkhov Stage Brezelina palmata | Volkhov Stage Briarocrinus angustus | upper Silurian Briarocrinus inflatus | upper Silurian Broeggeria salteri | Cambrian → Hunneberg Stage Bromidella zvankensis | Bronteopsis panderi | Kukruse Stage Bryograptus kjerulfi | Lower Ordovician Bryograptus ramosus | Lower Ordovician Bubnoffiopsis bubnoffi | Idavere Substage → Jõhvi Substage Bubnoffiopsis incognitus | Oandu Stage → Vormsi Stage Bucanella crispata | Aseri Stage Bucanella revaliensis | Kunda Stage Bucania cornu | Vormsi Stage → Pirgu Stage Bucania czekanowskii | Bucania radiata | Rakvere Stage → Pirgu Stage Bucerella bucera | Middle Ordovician → Upper Ordovician Bucerella wilnoiensis | Upper Ordovician Buckelopsis dyca | Bulbosclerites unicornis | Oandu Stage → Porkuni Stage Bullaeferum granodus | Pirgu Stage Bullaeferum tapaënsis | Rakvere Stage → Pirgu Stage Bunodes lunula | Rootsiküla Stage Bunodes rugosus | Rootsiküla Stage Bursachitina nana | Adavere Stage → Jaani Stage Bursachitina nestorae | Adavere Stage Bursachitina umbilicata | Pirgu Stage → Porkuni Stage Byssacanthus dilatatus | Pärnu Stage → Aruküla Stage Bystrowicrinus parvirugosus | Nabala Stage Bystrowicrinus primarius | Rakvere Stage Bythocyproidea sarvi | Raikküla Stage Bythopora ljudmilae | Keila Stage Bythopora ulrichi | Wenlock Cadmea inexplorata | Wenlock Calcaribeyrichia altonodosa | Paadla Stage → Kaugatuma Stage Calcaribeyrichia calcarata | Ludlow Calcaribeyrichia katriensis | Paadla Stage Calcaribeyrichia simplicior | Paadla Stage Calceocrinus balticensis | Juuru Stage Calcihexactina franconica | Cambrian → Ordovician Callocladia acanthoporoides | Přidoli → Lower Devonian Callocladia cava | Přidoli Callocladia emaciata | Kuressaare Stage Callocladia kaugatumensis | Kaugatuma Stage Callocladia rara | Přidoli → Lower Devonian Callocladia tomashevensis | Přidoli → Lower Devonian Callograptus kaljoi | Porkuni Stage Callopora incontroversa | Ordovician Calloporella concinna | Vormsi Stage Calloporella expressa | Kukruse Stage Calloporella jarvensis | Kukruse Stage Calloporella lamella | Sandbian → Katian Calloporella modzalevskayae | Ordovician Calloporella schmidti | Keila Stage → Oandu Stage Calloporella septata | Pirgu Stage Calloporella serotina | Vormsi Stage → Pirgu Stage Calloporella tauchenisensis | Nabala Stage Calloporella undulata | Keila Stage → Nabala Stage Calophyllum robustum | Silurian Calostylis concavifundatus | Porkuni Stage Calostylis concavotabulata | Silurian Calostylis luhai | Adavere Stage Calpichitina acollaris | Jaani Stage → Jaagarahu Stage Calpichitina complanata | Kunda Stage → Pirgu Stage Calpichitina densa | Adavere Stage → Jaani Stage Calpichitina lata | Haljala Stage → Vormsi Stage Calpichitina opaca | Adavere Stage → Jaani Stage Calpichitina velata | Kaugatuma Stage → Ohesaare Stage Calpiocrinus ovatus | Wenlock Calpiocrinus rotundatus | Wenlock Calymene ansensis | Juuru Stage Calymene blumenbachi | Jaani Stage → Jaagarahu Stage Calymene carinata | Calymene conspicua | Ohesaare Stage Calymene ezerensis | Calymene flabellata | Calymene frontosa | Adavere Stage Calymene kaugatumensis | Calymene latigenata | Raikküla Stage Calymene latvica | Calymene mimaspera | Wenlock Calymene mimaspera livonica | Jaani Stage Calymene mimaspera mimaspera | Jaani Stage Calymene minimarginata | Wenlock Calymene orthomarginata | Jaani Stage Calymene schmidti | Calymene soervensis | Calyptaulax norvegicus | Camarotubus graptocamaraeformis | Middle Ordovician Camerella acuminata | Kunda Stage Cameroceras aluverense | Jõhvi Substage Cameroceras hasta | Vormsi Stage Cameroceras kegelense | Keila Stage Cameroceras kerstovense | Kukruse Stage Cameroceras kuckersense | Kukruse Stage Cameroceras lasnamaense | Lasnamägi Stage Cameroceras ojamense | Idavere Substage Cameroceras ontikaense | Lasnamägi Stage Cameroceras paldiskiense | Lasnamägi Stage Cameroceras planum | Lasnamägi Stage → Uhaku Stage Cameroceras rakverense | Rakvere Stage Cameroceras regulus | Vormsi Stage Cameroceras shundrorovense | Idavere Substage Cameroceras spongistraticum | Idavere Substage Cameroceras tallinense | Lasnamägi Stage Cameroceras ubjaense | Kukruse Stage Cameroceras vertebrale | Rakvere Stage Campograptus arcuatus | Llandovery Campograptus clingani | Silurian Campograptus communis | Llandovery Campograptus elongatus | Llandovery Campograptus harpago | Silurian Campograptus lobiferus | Silurian Campograptus millepeda | Llandovery Campograptus rostratus | Llandovery Campophyllum irregulare | Jaani Stage Capillapora arcuata | Kukruse Stage Capillapora irrasa | Idavere Substage Caprabolbina capra | Pirgu Stage Caprabolbina carana | Oandu Stage Carabocrinus esthonus | Keila Stage → Oandu Stage Carinobolbina carinata carinata | Jõhvi Substage → Keila Stage Carinobolbina carinata estona | Kukruse Stage → Idavere Substage Carolinites popovkiensis | Carpocrinus angelini | Ludlow Carpocrinus ornatus | Wenlock Carpocrinus petilus | Ludlow Carpospongia castanea | Idavere Substage → Jõhvi Substage Carpospongia globosa | Jõhvi Substage → Keila Stage Carpospongia pogrebovi | Caryocrinites septentrionalis | Katian Caryocystites dubius | Sandbian Caryocystites esthoniae | Ordovician → Silurian Caryocystites laevis | Lower Ordovician Caryocystites lagenalis | Katian Caryocystites rugosus | Katian Caryocystites thorsundi | Katian Caryocystites valdari | Sandbian Caryocystites variabilis | Katian → lower Silurian Caryospongia diadema | Haljala Stage Caryospongia roemeri | Jõhvi Substage Cataschisma nitida | Porkuni Stage Cataschisma winkleri | Kukruse Stage Catenipora approximata | Juuru Stage → Raikküla Stage Catenipora arctica | Juuru Stage → Llandovery Catenipora arctiformis | Wenlock Catenipora carlsoensis | Wenlock Catenipora copulata | Raikküla Stage Catenipora crassa | Silurian Catenipora distans | Llandovery → Wenlock Catenipora elegans | Adavere Stage Catenipora escharoides | Raikküla Stage → Rootsiküla Stage Catenipora exilis | Adavere Stage Catenipora gotlandica | Llandovery Catenipora hedei | Wenlock Catenipora heintzi | Sheinwoodian Catenipora immemorata | Jaani Stage Catenipora jarviki | Wenlock Catenipora labyrinthica | Catenipora llandoverensis | Llandovery Catenipora malmoeyensis | Llandovery Catenipora martinssoni | Juuru Stage Catenipora maxima | Llandovery Catenipora minuta | Silurian Catenipora monstruosa | Catenipora norvegica | Llandovery Catenipora obliqua | Nabala Stage → Pirgu Stage Catenipora oriens | Raikküla Stage → Jaani Stage Catenipora panga | Adavere Stage → Jaani Stage Catenipora quadrata | Raikküla Stage → Jaani Stage Catenipora quadtrataeformis | Llandovery Catenipora regnelli | Wenlock Catenipora ringerikensis | Llandovery → Wenlock Catenipora rubraeformis | Pirgu Stage Catenipora septosa | Juuru Stage → Raikküla Stage Catenipora spiroddensis | Llandovery Catenipora tapaensis | Vormsi Stage → Pirgu Stage Catenipora tractabilis | Pirgu Stage Catenipora vespertina | Jaani Stage Catenipora wrighti | Vormsi Stage Cavellina angulata | Ludlow Cavellina baltica | Ohesaare Stage Cavellina circulata | upper Silurian Cavellina cornuta | Kaugatuma Stage Cavellina curta | upper Silurian Cavellina insueta | Ludlow Cavellina interposita | upper Silurian Cavellina plana | Ludlow Cavellina primaria | Paadla Stage Cavellina transitiva | upper Silurian Cayugaea suecicus | Celticystis gotlandicus | Wenlock Cephalograptus cometa | Llandovery Ceramophylla vaupeliformis | Ludlow Ceramopora armata | Llandovery → Wenlock Ceramopora berzelli | Hirnantian Ceramopora corniforme | Porkuni Stage Ceramopora explicata | Aseri Stage → Idavere Substage Ceramopora hennigi | Hirnantian Ceramopora imbricata | Adavere Stage Ceramopora intercellata | Lasnamägi Stage → Vormsi Stage Ceramopora invenusta | Rakvere Stage Ceramopora kukrusensis | Uhaku Stage → Kukruse Stage Ceramopora lindstroemi | Upper Ordovician → lower Silurian Ceramopora magnicellularis | Kunda Stage → Aseri Stage Ceramopora niagaraensis germana | Porkuni Stage Ceramopora perforata | Ludlow Ceramopora rotunda | Ludlow Ceramopora shkipiensis | Pirgu Stage Ceramopora spongiosa | Keila Stage → Oandu Stage Ceramopora vasalemmica | Keila Stage Ceramoporella distincta | Ordovician Ceramoporella interporosa | Ordovician Ceramoporella minor | Haljala Stage Ceratobolbina allikuensis | Idavere Substage → Jõhvi Substage Ceratopsis bicornis | Kukruse Stage → Idavere Substage Ceratopsis bocki | Volkhov Stage → Kunda Stage Ceratopsis cornuta | Kukruse Stage → Idavere Substage Ceratopsis granulata | Oandu Stage → Rakvere Stage Ceratopsis margaritata | Idavere Substage → Jõhvi Substage Ceratopsis obliquejugata | Uhaku Stage → Jõhvi Substage Ceratopsis perpunctata | Uhaku Stage Ceratopsis platyceras | Uhaku Stage → Kukruse Stage Ceratopsis regalis | Rakvere Stage Ceratopyge acicularis | Varangu Stage Ceratopyge forficula | Varangu Stage Ceratopyge latelimbata | Varangu Stage Ceratreta tanneri | Upper Cambrian (old nomenclature) Ceraurinella ingica | Volkhov Stage Chaetetes hemisphaericus | Haljala Stage Chaetetes pyriformis | Volkhov Stage → Kunda Stage Champlainopora oepiki | Keila Stage Charactoceras estonicum | Pirgu Stage Charactoceras kallholnense | Katian Charactoceras raettvikense | Katian Charactoceras suecicum | Katian Charactoceras tolerabile | Oandu Stage Charactoceras triangulum | Katian Chasmatopora furcata | Kukruse Stage → Jõhvi Substage Chasmatopora furcata fastigata | Kukruse Stage Chasmatopora livonica | Upper Ordovician Chasmatopora papillosa | Kukruse Stage Chasmatopora silurica | Juuru Stage Chasmatopora tenella | Vormsi Stage Chasmatoporina jootmaensis | Pirgu Stage Chaunograptus defensor | Kukruse Stage Chaunograptus ramulus | Kukruse Stage Chaunograptus sphaericola | Kukruse Stage → Idavere Substage Cheilotrypa immatura | Nabala Stage → Vormsi Stage Cheiracanthoides comptus | Narva Stage Cheiracanthoides estonicus | Narva Stage Cheiracanthoides proprius | Narva Stage Cheiracanthus brevicostatus | Pärnu Stage → Burtnieki Stage Cheiracanthus crassus | Narva Stage Cheiracanthus gibbosus | Rezekne Stage → Pärnu Stage Cheiracanthus intricatus | Narva Stage → Burtnieki Stage Cheiracanthus longicostatus | Emsian → Frasnian Cheiracanthus talimae | Narva Stage Cheirocrinus atavus | Kunda Stage Cheirocrinus giganteus | Volkhov Stage → Kunda Stage Cheirocrinus granulatus | Uhaku Stage → Kukruse Stage Cheirocrinus holmi | Middle Ordovician Cheirocrinus hyperboreus | Middle Ordovician Cheirocrinus interruptus | Ordovician Cheirocrinus leuchtenbergi | Ordovician Cheirocrinus nodosus | Ordovician Cheirocrinus penniger | Kunda Stage Cheirocrinus radiatus | Kunda Stage Cheirocrinus volborthi | Kunda Stage → Kukruse Stage Cheirolepis gaugeri | Burtnieki Stage Cheirolepis gracilis | Pärnu Stage → Narva Stage Chilobolbina dentifera | Kukruse Stage Chilobolbina lativelata | Ordovician Chilobolbina sudermannica | Chisiloceras balticum | Lasnamägi Stage Chisiloceras luganusense | Lasnamägi Stage Choanoceras mutabile | Chonetoide gamma | Kukruse Stage → Rakvere Stage Chonetoide iduna | Upper Ordovician Chonetoidea gamma gamma | Oandu Stage → Rakvere Stage Chonetoidea gamma inequicostellata | Kukruse Stage → Haljala Stage Chonophyllum planum | Juuru Stage Christiania dalarnensis | Hirnantian Christiania elongata | Ordovician Christiania holtedahli | Haljala Stage → Keila Stage Christiania oblonga | Lasnamägi Stage Cicerocrinus elegans | Přidoli Cicerocrinus osiliensis | Ohesaare Stage Cicerocrinus scanicus | Ohesaare Stage Cingulochitina baltica | Jaagarahu Stage → Paadla Stage Cingulochitina cingulata | Jaagarahu Stage → Rootsiküla Stage Cingulochitina crassa | Jaagarahu Stage → Rootsiküla Stage Circotheca stylus | Cambrian Circulina cruda | Upper Ordovician Circulina dibulbosa | Idavere Substage → Rakvere Stage Circulina egregia | Keila Stage Circulina fimbriata | Idavere Substage → Jõhvi Substage Circulina infecta | Idavere Substage → Jõhvi Substage Circulina nuda | Upper Ordovician Circulina paulis | Jõhvi Substage Circulina posterovelata | Rakvere Stage Circulinella gailitae | Porkuni Stage Circulinella nuda | Keila Stage → Oandu Stage Cladodictya capsuliformis | Jõhvi Substage → Oandu Stage Cladopora perrara | Jaagarahu Stage Clathroceras plicatum | Ludlow Clathrochitina clathrata | Jaagarahu Stage Clathrodictyon adaverense | Adavere Stage Clathrodictyon affabile | Jaani Stage Clathrodictyon boreale | Juuru Stage → Raikküla Stage Clathrodictyon clivosum | Raikküla Stage Clathrodictyon conodigitatum | lower Silurian Clathrodictyon delicatulum | Adavere Stage Clathrodictyon demissum | Juuru Stage Clathrodictyon gregale | Porkuni Stage Clathrodictyon incongruum | Llandovery Clathrodictyon kudriavzevi | Juuru Stage → Raikküla Stage Clathrodictyon lennuki | Juuru Stage Clathrodictyon microundulatum | Vormsi Stage → Pirgu Stage Clathrodictyon mohicanum | Ludlow Clathrodictyon regulare | Llandovery Clathrodictyon sarvense | Juuru Stage Clathrodictyon sulevi | Juuru Stage Clathrodictyon turritum | Juuru Stage → Raikküla Stage Clathrodictyon variolare | Adavere Stage → Jaani Stage Clathrodictyon vormsiense | Vormsi Stage Clathrodictyon zonatum | Porkuni Stage Clathropora baltica | Pirgu Stage → Porkuni Stage Clathropora bifurcata | Hirnantian Clavofabella abrasa | Ludlow Clavofabella attrita | Ludlow Clavofabella contracta | Paadla Stage Clavofabella diffusa | Rootsiküla Stage → Paadla Stage Clavofabella dubia | Ludlow Clavofabella extenta | Jaagarahu Stage Clavofabella heterosa | Paadla Stage Clavofabella incurvata | Jaagarahu Stage Clavofabella juvenca | Jaani Stage Clavofabella lativelata | Kaugatuma Stage Clavofabella maxima | Paadla Stage → Kaugatuma Stage Clavofabella multicostata | Ludlow Clavofabella multidentata | Wenlock Clavofabella nodosa | Paadla Stage → Kaugatuma Stage Clavofabella pomerancia | Silurian → Devonian Clavofabella reliqua | Ludlow Clavofabella reticristata | Jaani Stage → Jaagarahu Stage Clavofabella vicina | Jaagarahu Stage Clidochirus pyrum | Wenlock Cliftonia dorsata | Kukruse Stage Cliftonia oxoplecioides | Hirnantian Climacograptus bicornis | Ordovician Climacograptus brevis | Upper Ordovician Climacograptus diplacanthus | Upper Ordovician Climacograptus distichus | Lasnamägi Stage Climacograptus kuckersianus | Kukruse Stage Climacograptus miserabilis | Climacograptus normalis | Llandovery Climacograptus pauperatus | Ordovician Climacograptus rectangularis | Llandovery Climacograptus rotundatus | Middle Ordovician Climacograptus scalaris | Llandovery Climacograptus skagensis | Middle Ordovician Climacograptus spiniferus | Upper Ordovician Climacograptus styloides | Upper Ordovician