page_title: List of the Mesozoic life of Utah
section_title: P
hierarchical_section_title: List of the Mesozoic life of Utah / P
caption_attribution_description: Italiano: fossil Placenticeras meeki
context_page_description: This list of the Mesozoic 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 252.17 and 66 million years of age.
context_section_description: †Pachyomphalus
  †Pachyomphalus americanus – type locality for species
   †Pagiophyllum
  †Paiutemys – type locality for genus
  †Paiutemys tibert – type locality for species
  †Palaeophycus – or unidentified comparable form
  †Palaeopiceoxylon
  †Palaeopiceoxylon thinosu
  †Palaeopiceoxylon thinosus
  †Palaeoscincosaurus
  †Palaeoscincosaurus pharkidodon – type locality for species
  †Paleoaster
  †Paleoaster inquirenda
  †Palmulasaurus – type locality for genus
  †Palmulasaurus quadratus – type locality for species
  †Parachondroceras
  †Parachondroceras andrewsi
  †Parachondroceras filicostatum – or unidentified comparable form
  †Paracimexomys
  †Paracimexomys judithae – or unidentified comparable form
  †Paracimexomys magnus
  †Paracimexomys perplexus – type locality for species
  †Paracimexomys priscus – or unidentified comparable form
  †Paracimexomys robisoni – type locality for species
  †Paraglyphanodon – type locality for genus
  †Paraglyphanodon gazini – type locality for species
  †Paraglyphanodon utahensis – type locality for species
  †Parallelodon – tentative report
  †Parallelodon beyrichii – or unidentified related form
  †Paramacellodus
  †Paramacellodus oweni – or unidentified comparable form
  †Paranyctoides
  †Paraphyllanthoxylon
  †Paraphyllanthoxylon utahense
  †Parasaniwa
  †Parasaniwa cynochoros – type locality for species
  †Parasaniwa wyomingensis – or unidentified comparable form
   †Parasaurolophus
  †Parasaurolophus cyrtocristatus
  †Pariadens
  †Pariadens kirklandi – type locality for species
  †Pariadens mckennai – type locality for species
  †Parmicorbula
  †Paronychodon – or unidentified comparable form
  †Parotosuchus
  †Parotosuchus nov. spec. – informal
  †Parussuria
  †Parussuria compressa
  †Patulopora
  †Patulopora cutleri
  †Paullia
  †Pediomys – report made of unidentified related form or using admittedly obsolete nomenclature
  †Pegmavalvula
  †Pegmavalvula triassica
  †Pelecypodichnus
  †Peloroplites – type locality for genus
  †Peloroplites cedrimontanus – type locality for species
  †Peneteius – type locality for genus
  †Peneteius saueri – type locality for species
  †Pentasauropus
  †Periallus
  †Periallus woodsidensis
  †Perissoptera
  †Permophorus
  †Permophorus bregeri – or unidentified comparable form
  †Permophorus triassicus
  †Pernopecten
  †Phelopteria
  †Phelopteria minuta – or unidentified comparable form
  †Phlebopteris
   Pholadomya
  †Pholadomya inaequiplicata
  †Pholadomya kingi
  †Piarorhynchella
  †Piarorhynchella triassica
  †Piarorhynchella triassicus
  †Picopsis
  †Pinacosuchus – type locality for genus
  †Pinacosuchus mantiensis – type locality for species
  Pinna
  †Pinna kingi
  †Pistia – report made of unidentified related form or using admittedly obsolete nomenclature
  †Pistia corrugata
  †Pityoxylon
   †Placenticeras
  †Placenticeras cumminsi
  Placopsilina
  †Plagioglypta
  †Plagiostoma
  †Plagiostoma occidentalis
  †Plagiostoma ziona
  †Planicoxa – type locality for genus
  †Planicoxa venenica – type locality for species
  †Planolites
  †Plataninium
  †Plesiopinna
  †Pleuromya
  †Pleuromya musculoides – or unidentified comparable form
  †Pleuromya prima – type locality for species
  †Pleuromya subcompressa
  †Pleuronautilus
  †Pleuronectites
  Pleurotomaria – tentative report
  Plicatula
  †Plicatula ferryi – or unidentified comparable form
  †Podozamites
  †Polyacrodus – tentative report
  †Polyglyphanodon – type locality for genus
  †Polyglyphanodon sternbergi – type locality for species
  †Polygyrina
   †Poposaurus
  †Poposaurus gracilis
  †Preflorianites
  †Preflorianites toulai
  †Preprismatoolithus
  †Preprismatoolithus coloradensis
  †Priacodon
  †Primaderma – type locality for genus
  †Primaderma nessovi – type locality for species
  †Prismatoolithus
  †Prismatoolithus jenseni – type locality for species
  †Procerithium – tentative report
  †Promathildia
  †Promathildia spirocostata – type locality for species
  †Promyalina
  †Promyalina putiatinensis
  †Promyalina spathi
  †Promysidiella
  †Pronoella
  †Pronoella cinnabarensis – or unidentified comparable form
  †Pronoella uintahensis
  †Proplacenticeras
  †Proplacenticeras stantoni
  †Prorokia
  †Prorokia fontenellensis
  †Protalphadon
  †Protocardia
  †Protogusarella
  †Protogusarella smithi
  †Protopis
  †Protopis waageni – or unidentified related form
  †Prot
caption: Fossilized shell of the Late Cretaceous ammonoid cephalopod Placenticeras
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