This list of the Paleozoic life of Utah contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Utah and are between 538.8 and 252.17 million years of age.
A
†Acanthopecten †Acanthopecten carboniferus †Acanthopecten coloradoensis †Achlysopsis †Achlysopsis liokata – or unidentified comparable form †Achlysopsis punctatum †Acidiphorus †Acidiphorus brevis – or unidentified comparable form †Acidiphorus brevus †Acidiphorus brighti †Acidiphorus pseudobathurus †Acidiphorus unicorna – type locality for species †Acidiphorus wahwahensis †Acidiphorus williamsi – type locality for species †Acinocricus †Acinocricus stichus †Acodus †Acodus similaris †Acontiodus †Acontiodus coniformis †Acrothele †Acrothele subsidua †Acrotreta †Adiantites †Adiantites tenuifolius †Aesiocrinus †Aesiocrinus secundus – type locality for species †Agnostus †Agnostus neglectus †Allorisma †Allorynchus †Alokistocare †Alokistocare carnatum †Alokistocare harrisi †Alokistocare idahoense †Alokistocare normale †Alokistocare subcoronatum †Alokistocarella †Alokistocarella brighamensis †Altiocculus †Altiocculus concavus †Altiocculus drumensis †Amblycranium †Amblycranium cornutum †Amblycranium linearus – type locality for species †Amblycranium variabile †Amecephalus †Amecephalus laticudum †Ameura – tentative report †Ammagnostus †Ammagnostus beltensis †Amphiscapha †Amplexizaphrentis †Amplexizaphrentis paucicinctus †Amplexizaphrentis spinulosus †Amplexizaphrentis subcrassus †Amplexocarina †Amplexus †Anabarochilna †Anabarochilna australis – or unidentified comparable form †Ananias †Ananias nevadensis – or unidentified related form †Ancillotoechia †Ancillotoechia perryi – type locality for species †Anemonaria †Anemonaria delicatula †Angulotreta †Angyomphalus †Angyomphalus regularis †Anidanthus †Anidanthus echaris †Anisopyge †Anisotrypa †Annularia †Annularia stellata †Annulispongia – type locality for genus †Annulispongia interrupta – type locality for species †Anomalocaris †Anomalocaris nathorsti †Anomalorthis †Anomalorthis lambda †Anomalorthis oklahomensis †Anomalorthis utahensis †Anomphalus †Anomphalus rotulus †Anthaspidella †Anthracospirifer †Anthracospirifer increbescens †Anthracospirifer leidyi †Anthracospirifer occiduus †Antiquatonia †Antiquatonia portlockianus †Antiquatonia sulcatus – or unidentified comparable form †Apachella †Apatognathus †Aphelaspis †Aphelaspis haguei †Aphelotoxon †Aphelotoxon acuminata †Apheoorthis †Apheoorthis melita – or unidentified comparable form †Apheorthis †Apheorthis meeki – or unidentified comparable form †Archaeocalamites †Archaeocalamites scrobiculatus †Archaeocothurnus – tentative report †Archaeocothurnus bifida – type locality for species †Archaeoscyphia †Archaeoscyphia rossi †Archeocalamites †Archeocalamites radiatus †Archeoschyphia †Archimedes †Archimedes macfarlani †Archimedes owenanus †Arcuolimbus †Arenicolites †Arroyocrinus †Arroyocrinus stokesi – type locality for species †Arthrophycus – tentative report †Artisia †Asaphelina †Asaphellus – tentative report †Asaphiscus †Asaphiscus wheeleri †Ascopora †Ascopora macellata †Astartella †Astartella subquadrata †Asterophyllites †Asterophyllites charaeformis †Asterophyllites equisetiformis †Asterophyllites longifolius †Athabaskia †Athabaskia bithus †Athabaskia wasatchensis †Athyridacid †Athyris †Athyris lamellosa †Atrypa †Atrypa hedei †Atrypa parva – or unidentified comparable form †Atrypid †Aulacoparia – tentative report †Aulacoparia quadrata †Aulacoparia venta †Aulacotheca †Aulacotheca campbellii †Aulacotheca hemingwayi †Aulopora – tentative report †Aviculopecten †Aviculopecten girtyi †Aviculopecten kaibabensis – or unidentified comparable form †Aviculopinna †Aviculopinna peracuta – tentative report †Aysheaia
B
†Babylonites †Babylonites conoideus †Bakevellia †Baltagnostus †Baltagnostus eurypyx †Barrandia – tentative report †Bathymyonia †Bathymyonia nevadensis †Bathyurellus †Bathyurellus feitleri †Bathyurellus pogonipensis †Bathyurellus pogonopensis †Bathyurellus teretus – type locality for species †Bathyuriscus †Bathyuriscus brighamensis †Bathyuriscus elegans †Bathyuriscus fimbriatus †Bathyuriscus wasatchensis †Bayfieldia †Bearriverops †Bearriverops alsacharovi – type locality for species †Bearriverops borderinnensis – type locality for species †Bearriverops deltaensis – type locality for species †Bearriverops ibexensis – type locality for species †Bearriverops loganensis †Beckwithia †Beckwithia typa †Belemnospongia †Belemnospongia neofascicularis – type locality for species †Bellazona †Bellazona bella †Bellazona polita – type locality for species †Bellefontia †Bellefontia acuminiferentis †Bellefontia chamberlaini †Bellefontia ibexensis †Benthamaspis †Benthamaspis diminutiva †Benthamaspis gibberula – type locality for species †Benthamaspis obrepta †Beyrichoceras †Bighornia †Billingsella †Biscoia †Blastoidocrinus †Blastoidocrinus carchariaedens – or unidentified comparable form †Blountia †Bolaspidella †Bolaspidella contracta †Bolaspidella housensis †Bolaspidella type locality for species – informal †Bolaspidella wellsvillensis †Bolbocephalus †Bollandoceras †Bollandoceras occidentale – type locality for species †Bonneterrina †Bourbonnella †Bourbonnella jocelynae – type locality for species †Bowmania †Brachyaspidion †Brachyaspidion microps †Brachyaspidion sulcatum †Brachyprion †Brachyprion geniculata †Brachythyris †Branchiocaris †Branchiocaris pretiosa †Brassicicephalus †Breckwithia †Breckwithia typa †Brodioptera †Brodioptera stricklani – type locality for species †Bromella †Brooksella †Bucania †Bythicheilus †Bythicheilus typicum
C
†Cactocrinus †Cactocrinus arnoldi †Calamites †Calamites cistii – or unidentified comparable form †Calamites cistiiformis †Calamites gigas †Calamites hesperius †Calamites infractus †Calamites suckowii †Calamostachys – tentative report †Calathium †Calathium yersini – type locality for species †Callipteris – tentative report †Callocladia †Callocladia jensensis †Calycocoelia †Calygirtyoceras †Calygirtyoceras arcticum †Calygirtyoceras confusionense – type locality for species †Camarotoechia †Cambromedusa – type locality for genus †Cambromedusa furcula – type locality for species †Camerella †Campbelloceras – tentative report †Canadaspis †Canadaspis perfecta – or unidentified comparable form †Canadia †Canadiphyllum †Cancrinella †Cancrinella phosphatica – or unidentified comparable form †Caninaphyllum †Caninaphyllum incrussatum †Caninia †Caninia torquia †Caninophyllum †Canthylotreta †Canthylotreta marjumensis †Cardiomorpha †Cardiopteris †Cardiopteris hirta – or unidentified comparable form †Carolinites †Carolinites ekphymosus †Carolinites genacinaca – type locality for species †Carolinites killarnyensis †Carolinites killaryensis †Castericystis †Castericystis sprinklei – type locality for species †Castericystis vali – type locality for species †Catoraphiceras †Catoraphiceras colon †Caulpsis †Caulpsis punctata †Cavusgnathus †Cavusgnathus regularis †Cavusgnathus unicornis †Cedaria †Cedaria minor †Cedarina – tentative report †Cenorhynchia †Cenorhynchia type locality for species A – informal †Cernuolimbus †Cernuolimbus granulosus †Chaenomya †Chaetetes †Chaetetes milleporaceous †Chancelloria †Chancelloria eros †Chancelloria pentacta – type locality for species †Chancia) †Chancia ebdome – or unidentified comparable form †Chanciaopsis – type locality for genus †Chanciaopsis heteromorphos – type locality for species †Chanciopsis †Chanciopsis heteromorphos †Cheilocephalus †Chilotrypa †Choia †Choia carteri †Choia hindei †Choia ridleyi †Choia utahensis †Chondrites †Chonetes †Chonetina †Chonetina flemingi †Choristites †Choristites fritschi – or unidentified comparable form †Choristites pavlovi – or unidentified comparable form †Cladochonus †Clathrospira – tentative report †Clavagnostus †Clavagnostus repandus †Cleiothyridina †Cleiothyridina type locality for species A – informal †Cleiothyridina type locality for species B – informal †Clelandia †Clelandia utahensis †Cliothyridina †Cliothyridina orbicularis †Clonograptus †Coelogasteroceras †Coenites †Colinispongia †Colinispongia regularis †Composita †Composita argentea †Composita mira †Composita ovata †Composita parasulcata †Composita plana †Composita subtilita †Composita trilobata †Composita trinuclea †Condrathyris †Condrathyris perplexa †Conotreta †Conotreta millardensis †Coosella †Coosina †Cordaianthus †Cordaianthus pseudofluitans †Cordaicarpus †Cordaicarpus binutus – type locality for species †Cordaicarpus cordatus †Cordaicarpus elongatus †Cordaicarpus globosus – type locality for species †Cordaicarpus jayshulerii – type locality for species †Cordaicarpus manningcanensis – type locality for species †Cordaites †Cordaites angulosostriatus †Cordaites principalis †Cordaites Sp. A – informal †Cordaites Sp. B – informal †Cornucarpus †Cornucarpus longicaudatus – type locality for species †Corynepteris †Corynepteris angustissima †Costellarina †Cotalagnostus Crania †Crania rowleyi †Cravenoceras †Crepicephalus †Crossopteris – type locality for genus †Crossopteris mcknightii – type locality for species †Crossopteris undulata – type locality for species †Crossopteris utahensis – type locality for species †Crurithyris †Crurithyris arcuatus – or unidentified comparable form †Crurithyris expansa – tentative report †Cruziana †Ctenalosia †Ctenalosia fixata †Ctenocystis †Ctenocystis utahensis †Ctenospondylus †Ctenospondylus casei – or unidentified related form †Cyathaxonia †Cyathocarpus †Cyathocarpus arborescens †Cyathocarpus cyatheus †Cybeloides †Cybelopsis †Cybelopsis speciosa †Cyclopteris †Cyclopteris dilatata †Cymatospira †Cymatospira montfortianus †Cymbiocrinus †Cymbiocrinus anatonus – type locality for species †Cymbiocrinus cuneatus – type locality for species †Cyperites †Cyperites bicarinatus †Cyrtia †Cyrtina †Cyrtorostra †Cystodictya †Cystodictya astrepta
D
†Dalmanellida †Deiracephalus †Delaria †Delaria sevilloidia †Delocrinus †Delocrinus subhemisphericus †Deltina – type locality for genus †Deltina limba – type locality for species Dentalium †Derbyia †Derbyia bennetti †Derbyia crassa †Derbyia sulca †Derbyia wabashensis †Desmoinesia †Desmoinesia muricatina †Diacanthaspis †Diacanthaspis trispineus – type locality for species †Diadectes †Diagoniella †Diagoniella cyathiformis †Diagoniella hindei †Diagoniella magna – type locality for species †Diagoniella robisoni – type locality for species †Diaphragmus †Diaphragmus cestriensis †Dicanthopyge †Dicanthopyge convergens †Dicranocaris †Dicranocaris guntherorum †Dictyoclostus †Dictyoclostus burlingtonensis †Dictyoclostus inflatus †Dictyonema †Dictyonema flabelliforme – or unidentified comparable form †Didymograptus †Didymograptus artus †Didymograptus bifidus †Didymograptus nitidus – or unidentified comparable form †Dielasma †Dielasma formosum †Dielasma phosphoriense †Dielasma spatulatum †Dimegelasma †Dimeropygiella †Dimeropygiella blanda †Dimeropygiella caudanodosa – type locality for species †Dimeropygiella fillmorensis †Dimeropygiella mccormicki †Dimeropygiella ovata †Dimorphoceras †Dimorphoceras rileyi – type locality for species †Dimorphoceras worki – type locality for species †Dioxycaris †Dioxycaris argenta †Diparalasma †Diparelasma †Diparelasma pogonipensis – or unidentified comparable form †Diparelasma rowelli †Diparelasma transversum – or unidentified comparable form †Diphyphyllum †Diplagnostus †Diplagnostus planicauda †Diplorrhina †Diplorrhina depressa †Diplothmema †Diplothmema arnoldi