page_title: List of the prehistoric life of Utah
section_title: Selected Paleozoic taxa of Utah
hierarchical_section_title: List of the prehistoric life of Utah / Paleozoic / Selected Paleozoic taxa of Utah
caption_attribution_description: English: The foto shows a fossil of Didymograptus murchisoni, a graptolite from the Ordovician epoch. Deutsch: Das Foto zeigt ein Fossil von Didymograptus murchisoni, ein Graptolith aus dem Ordovizium
context_page_description: This list of the prehistoric life of Utah contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Utah.
context_section_description: †Acodus
  †Agnostus
  †Amphiscapha
  †Amplexus
  †Annularia
  †Annularia stellata
  †Anomalocaris
  †Anomphalus
  †Archimedes
  †Archimedes macfarlani
  †Arcuolimbus
  †Arenicolites
  †Artisia
   †Asaphiscus
  †Asaphiscus wheeleri
  †Athyris
  †Athyris lamellosa
  †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
   †Branchiocaris
  †Brassicicephalus
  †Calamites
  †Calamites cistii – or unidentified comparable form
  †Calamites suckowii
  †Callipteris – tentative report
  †Callocladia
  †Camarotoechia
  †Campbelloceras – tentative report
   †Canadaspis
  †Canadaspis perfecta – or unidentified comparable form
  †Canadia
  †Caninia
  †Cardiopteris
  †Carolinites
  †Cavusgnathus
  †Cedaria
  †Chancelloria
  †Chancia (genus)
  †Choia
  †Chondrites
  †Chonetes
  †Cladochonus
  †Cleiothyridina
  †Clonograptus
  †Coenites
   †Composita
  †Composita mira
  †Composita ovata
  †Composita parasulcata
  †Composita plana
  †Composita subtilita
  †Composita trinuclea
  †Coosella
  †Coosina
  †Cordaicarpus
  †Cordaites
  †Cordaites principalis
  Crania
  †Cravenoceras
  †Crepicephalus
  †Cruziana
   †Ctenospondylus
  †Cybelopsis
  †Cyclopteris
  †Cystodictya
  †Deiracephalus
  Dentalium
  †Diadectes
  †Diagoniella
  †Dictyonema
   †Didymograptus
  †Didymograptus nitidus – or unidentified comparable form
  †Dimeropygiella
  †Diplorrhina
  †Donaldina
  †Dresbachia
  †Echinaria
  †Ectosteorhachis – or unidentified related form
  †Ehmaniella
  †Eldonia
  †Eleutherocentrus
  †Elrathia
  †Elrathina
  †Emeraldella
  †Endoceras
   †Eryops
  †Euptychaspis
  †Fenestella
  †Forteyops
  †Genevievella
  †Girvanella
  †Gnathodus
  †Gogia
  †Goniatites
  †Gunterichthys – type locality for genus
  †Hamptonia
  †Haplophrentis
  †Hazelia
   †Helicoprion
  †Hematites
  †Hemirhodon
  †Hindia
  †Hintzeia
  †Homagnostus
  †Huronia
  †Hyolithellus
  †Hyolithes
  †Idiognathodus
  †Illaenus
  †Irvingella
  †Jeffersonia
  †Kanoshia
  †Kawina
  †Kingstonia
  †Kirkella
  †Komia
  †Kootenia
  †Lachnostoma
   †Leanchoilia
  †Lejopyge
  †Lepidodendron
  †Lepidodendron aculeatum
  †Lepidodendron obovatum
  †Lepidophyllum
  †Lepidostrobus
  †Leptomitus
  Lima
  Limatula
  Lingula
  †Lingulella
  †Llanoaspis
  †Lochriea
  †Lonchocephalus
  †Lyracystis
  †Margaretia
  †Margaretia dorus
  †Marpolia
  †Matthevia
   †Metacoceras
  †Meteoraspis
  †Micromitra
  Modiolus – report made of unidentified related form or using admittedly obsolete nomenclature
  †Mollisonia
  †Morania
  †Naraoia
  †Naticopsis
  †Neospirifer
  †Neospirifer cameratus
  †Neospirifer kansasensis
  †Neospirifer triplicatus
  †Neuropteris
  †Neuropteris gigantea
  †Neuropteris heterophylla
  †Niobe – tentative report
  †Nisusia
  †Norwoodia
  †Obolus
  †Ogygopsis
  †Olenellus
  †Olenoides
  †Olenoides nevadensis
  †Olenoides serratus
   †Ophiacodon
  †Ophiacodon navajovicus
  †Orthis
  †Oryctocephalus
  †Ottoia
  †Ottoia prolifica
  †Ozarkodina
  †Pagetia
  †Paladin
  Palaeoaplysina
  †Palaeoscolex
  †Pelagiella
  †Pentamerus
  †Peronopsis
  †Peronopsis interstricta
  †Perspicaris
  †Phillipsia
  †Phyllograptus
  Pinna – report made of unidentified related form or using admittedly obsolete nomenclature
  †Platycrinites
   †Platyhystrix – or unidentified comparable form
  †Platyhystrix rugosus
  †Prodentalium
  †Prohedinia
  †Protopliomerella
  †Protospongia
  †Ptychagnostus
  †Ptychagnostus atavus
  †Pugnax
  †Punka
  †Quadratia
  †Rayonnoceras
   †Receptaculites
  †Ribeiria
  †Rusophycus
  †Saukiella
  †Scenella
  †Schmalenseeia
  †Schwagerina
  †Scolicia
  †Selkirkia
  †Selkirkia columbia – or unidentified comparable form
  †Sidneyia
  †Sigillaria
  †Sigillaria brardii
   Sphenacodon
  †Sphenophyllum
  †Sphenophyllum angustifolium
  †Sphenophyllum verticillatum
  †Sphenopteris
  †Spinofacia – type locality for genus
  †Spirifer
  †Spirifer centronatus
  †Spirifer opimus
  †Spiriferina
  Spirorbis
  †Stenorhachis – tentative report
   †Stigmaria
  †Syringopora
  †Teichichnus – tentative report
  †Terranovella
  †Tetragraptus
  †Thalassinoides – tentative report
  †Tricrepicephalus
  †Trigonocercella
  †Trinodus
  †Triplagnostus
  †Trocholites
  †Tseajaia
  †Tseajaia campi – type locality for species
  †Tuzoia
   †Utaherpeton – type locality for genus
  †Vauxia
  †Walcottoceras – tentative report
  †
caption: Fossil of the Middle Ordovician graptolite Didymograptus
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