Paleozoic
Selected Paleozoic taxa of Utah
- † Acodus
- † Agnostus
- † Amphiscapha
- † Amplexus [ clarification needed ]
- † Annularia
- † Anomalocaris
- † Anomphalus
- † Archimedes
- † Arcuolimbus
- † Arenicolites
- † Artisia
Fossil of the Cambrian trilobite Asaphiscus - † Athyris
- † Atrypa
- † Atrypa parva – or unidentified comparable form
- † Atrypid
- † Aulopora – tentative report
- † Aviculopecten
- † Aviculopecten girtyi
- † Aviculopecten kaibabensis – or unidentified comparable form
- † Aysheaia
- † Bathyuriscus
- † Beckwithia
- † Benthamaspis
- † Beyrichoceras
- † Biscoia
- † Bolbocephalus
- † Bonneterrina
- † Bourbonnella
- † Bowmania
Life restoration of the mysterious Cambrian animal Branchiocaris - † Brassicicephalus
- † Calamites
- † Calamites cistii – or unidentified comparable form
- † Calamites suckowii
- † Callipteris – tentative report
- † Callocladia
- † Camarotoechia
- † Campbelloceras – tentative report
Life restoration of the Cambrian arthropod Canadaspis (left) - † Canadaspis perfecta – or unidentified comparable form
- † Canadia
- † Caninia
- † Cardiopteris
- † Carolinites
- † Cavusgnathus
- † Cedaria
- † Chancelloria
- † Chancia
- † Choia
- † Chondrites
- † Chonetes
- † Cladochonus
- † Cleiothyridina
- † Clonograptus
- † Coenites
Fossilized shell of the Late Devonian-Permian brachiopod Composita - † Coosella
- † Coosina
- † Cordaicarpus
- † Cordaites
- Crania
- † Cravenoceras
- † Crepicephalus
- † Cruziana
- † Ctenospondylus
- † Cybelopsis
- † Cyclopteris
- † Cystodictya
- † Deiracephalus
- Dentalium
- † Diadectes
- † Diagoniella
- † Dictyonema
Fossil of the Middle Ordovician graptolite Didymograptus - † Didymograptus nitidus – or unidentified comparable form
- † Dimeropygiella
- † Diplorrhina
- † Donaldina
- † Dresbachia
- † Echinaria
- † Ectosteorhachis – or unidentified related form
- † Ehmaniella
- † Eldonia
- † Eleutherocentrus
- † Elrathia
- † Elrathina
- † Emeraldella
- † Endoceras
Life restoration of the Carboniferous-Permian amphibian Eryops - † Euptychaspis
- † Fenestella
- † Forteyops
- † Genevievella
- † Girvanella
- † Gnathodus
- † Gogia
- † Goniatites
- † Gunterichthys – type locality for genus
- † Hamptonia
- † Haplophrentis
- † Hazelia
Life restoration of the Permian Chimaera relative Helicoprion - † Hematites
- † Hemirhodon
- † Hindia [ clarification needed ]
- † Hintzeia
- † Homagnostus
- † Huronia
- † Hyolithellus
- † Hyolithes
- † Idiognathodus
- † Illaenus
- † Irvingella [ clarification needed ]
- † Jeffersonia
- † Kanoshia
- † Kawina
- † Kingstonia
- † Kirkella [ clarification needed ]
- † Komia [ clarification needed ]
- † Kootenia
- † Lachnostoma
Life restoration in multiple views of the Cambrian arthropod Leanchoilia - † Lejopyge
- † Lepidodendron
- † Lepidophyllum
- † Lepidostrobus
- † Leptomitus
- Lima [ clarification needed ]
- Limatula
- Lingula
- † Lingulella
- † Llanoaspis
- † Lochriea
- † Lonchocephalus
- † Lyracystis
- † Margaretia
- † Marpolia
- † Matthevia
Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras - † Meteoraspis
- † Micromitra
- Modiolus – report made of unidentified related form or using admittedly obsolete nomenclature
- † Mollisonia
- † Morania
- † Naraoia
- † Naticopsis
- † Neospirifer
- † Neuropteris
- † Niobe [ clarification needed ] – tentative report
- † Nisusia
- † Norwoodia
- † Obolus [ clarification needed ]
- † Ogygopsis
- † Olenellus
- † Olenoides
Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon - † Orthis
- † Oryctocephalus
- † Ottoia
- † Ozarkodina
- † Pagetia
- † Paladin
- Palaeoaplysina
- † Palaeoscolex
- † Pelagiella
- † Pentamerus
- † Peronopsis
- † Perspicaris
- † Phillipsia
- † Phyllograptus
- Pinna – report made of unidentified related form or using admittedly obsolete nomenclature
- † Platycrinites
Life restoration of the Carboniferous-Permian sail-backed amphibian Platyhystrix - † Prodentalium
- † Prohedinia
- † Protopliomerella
- † Protospongia
- † Ptychagnostus
- † Pugnax [ clarification needed ]
- † Punka [ clarification needed ]
- † Quadratia
- † Rayonnoceras
Fossil of the Early Ordovician-Permian benthic alga Receptaculites - † Ribeiria
- † Rusophycus
- † Saukiella
- † Scenella
- † Schmalenseeia
- † Schwagerina
- † Scolicia
- † Selkirkia
- † Selkirkia columbia – or unidentified comparable form
- † Sidneyia
- † Sigillaria
Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Sphenacodon - † Sphenophyllum
- † Sphenopteris
- † Spinofacia – type locality for genus
- † Spirifer
- † Spiriferina
- Spirorbis
- † Stenorhachis – tentative report
Fossil preserved in situ of a Carboniferous tree-like club moss relative with attached Stigmaria rhizome system - † Syringopora
- † Teichichnus – tentative report
- † Terranovella
- † Tetragraptus
- † Thalassinoides – tentative report
- † Tricrepicephalus
- † Trigonocercella
- † Trinodus
- † Triplagnostus
- † Trocholites
- † Tseajaia
- † Tseajaia campi – type locality for species
- † Tuzoia
Life restoration of the Carboniferous amphibian Utaherpeton - † Vauxia
- † Walcottoceras – tentative report
- † Waptia
- † Waptia fieldensis – or unidentified comparable form
- † Weeksina
- † Wilkingia
- † Wiwaxia
- † Worthenia
- † Xenacanthus – or unidentified related form
- † Yuknessia
- † Zacanthoides
- † Zittelloceras
