page_title: List of the Paleozoic life of Montana
section_title: P
hierarchical_section_title: List of the Paleozoic life of Montana / P
caption_attribution_description: English: Fossil of Platyclymenia from Erfoud (Morocco)
context_page_description: This list of the Paleozoic life of Montana contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Montana and are between 541 and 252.17 million years of age.
context_section_description: †Paladin – tentative report
  †Palaeoneilo
  †Palaeoneilo elongata
  †Palaeonucula
  †Palaeonucula montanensis
  †Paleolimulus
  †Paleolimulus longispinus
  †Papilionichthys – type locality for genus
  †Papilionichthys stahlae – type locality for species
  †Parabolinoides
  †Paracyclus
  †Paraparchites
  †Paraphorhynchus
  †Paraphorhynchus ashboughense – type locality for species
  †Paraphorhynchus jeffersonense
  †Paraphorhynchus madisonense
  †Paraphorhynchus threeforkensis – type locality for species
  †Paraphorhynchus threeforksense
  †Paratarrasius – type locality for genus
  †Paratarrasius hibbardi – type locality for species
  †Pegmatrea – or unidentified related form
  †Pelagiella
  †Peltabellia
  †Peltabellia willistoni – type locality for species
  †Pennireptepora
   †Pentremites
  †Perditocardinia
  †Pericyclus
  †Pericyclus rockymontanus – type locality for species
  †Permophorus
  †Permophorus albequus
  †Pernoceras
  †Pernoceras crebriseptum
  †Peronopsis
  †Peronopsis scutalis – or unidentified comparable form
  †Petalorhynchus
  †Petalorhynchus beargulchensis – type locality for species
  †Petrocrania
  †Petrocrania modesta – or unidentified comparable form
  †Phestia
  †Phestia rugodorsata – type locality for species
  †Phiops – type locality for genus
  †Phiops aciculorum – type locality for species
  †Pinctus
  †Pinna
  †Pinna ludlovi
  †Plagioglypta
  †Platyceras
  †Platyceras niagarensis – or unidentified comparable form
   †Platyclymenia
  †Platyclymenia montana
  †Platycrinus
  †Platycrinus bozemanensis
  †Platycrinus incomptus
  †Plectodiscus
  †Plectodiscus latinautilus
  †Plectospira – tentative report
  †Plectospira problematica – or unidentified comparable form
  †Plethopeltis
  †Plethospira
  †Pleuroclymenia
  †Pleuroclymenia americana
  †Polidevcia
  †Polidevcia obesa
  †Polyosteorhynchus – type locality for genus
  †Polyosteorhynchus simplex – type locality for species
  †Polypora
  †Polyrhizodus
  †Polyrhizodus digitatus
  †Praepatokephalus
  †Presbynileus
  †Proceramala – type locality for genus
  †Proceramala montanensis – type locality for species
  †Procostatoria
  †Procostatoria sexradiata
  †Prodentalium
  †Prodentalium canna
  †Productella
  †Productella coloradensis
  †Productella coloradoense – or unidentified comparable form
  †Productella coloradoensis
  †Productella plicata – or unidentified comparable form
  †Productella spinerga – or unidentified comparable form
  †Productus
   †Proetus
  †Prographularia
  †Prographularia groenlandica – or unidentified comparable form
  †Promesus
  †Proplina
  †Proplina loganensis – type locality for species
  †Protopliomerops
  †Prototreta
  †Prototreta flabellata
  †Prototreta subcircularis
  †Prototreta trapeza
  †Psalikilus
  †Psalikilus paraspinosum
  †Psammodus
  †Pseudagnostus
  †Pseudoclelandia
  †Pseudodicellomus
  †Pseudogastrioceras
  †Pseudomonotis
  †Pseudopermophorus
  †Pseudopermophorus annettae – type locality for species
  †Pseudozygopleura
  †Pseudozygopleura scitula – or unidentified related form
  †Pterocephalia
  †Ptilograptus
  †Ptychagnostus
  †Ptychagnostus atavus
  †Ptychaspis
  †Ptychomalotoechia
  †Ptychomalotoechia sobrina
   †Ptychoparia
  †Ptyocephalus
  †Ptyocephalus montanensis – type locality for species
  †Pugnoides
  †Pugnoides parvulus
  †Punctolira
  †Punctolira punctolira
  †Punctospirifer
  †Punctospirifer transversus
  †Pustula
caption: Fossilized shell of the Late Devonian ammonoid cephalopod Platyclymenia
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