page_title: List of the Paleozoic life of Pennsylvania
section_title: A
hierarchical_section_title: List of the Paleozoic life of Pennsylvania / A
caption_attribution_description: English: Anomalocaris model at Dinosaur Museum, Canberra, Australia.
context_page_description: This list of the Paleozoic life of Pennsylvania contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Pennsylvania and are between 541 and 252.17 million years of age.
context_section_description: †Acanthopecten
  †Acanthopecten carboniferous
  †Acidaspis
  †Acidaspis cincinnatiensis
  †Acrothele
  †Acrothele decipiens
  †Acrothele yorkensis
  †Acrotreta
  †Actinomylacris
  †Actinomylacris similis – type locality for species
  †Actinopteria
  †Actinopteria boydi
  †Actinopteria boydii
  †Actinopteria decussata
  †Adelphobolbina
  †Adelphobolbina medialis
  †Adiantites
  †Adiantites mirabilis
  †Adiantites spectabilis – type locality for species
  †Adiantites ungeri – type locality for species
  †Adiatites
  †Adiatites cyclopteroides – type locality for species
  †Adiatites spectabilis – type locality for species
  †Aechmina
  †Agassizocrinus
  †Ageleodus
  †Ageleodus pectinatus
  †Aglaoglypta
  †Aglaoglypta maera
  †Aglaoglypta nactoides
  †Agnostus
  †Alcicornopteris
  †Alcicornopteris altoonensis – type locality for species
  †Alcicornopteris anthracitica – type locality for species
   †Alethopteris
  †Alethopteris densinervosa
  †Alethopteris ingbertensis
  †Alethopteris lonchitifolia
  †Alethopteris missouriensis
  †Alethopteris serli
  †Alethopteris westphalensis
  †Allanella
  †Allanella tullius
  †Alokistocare
  †Alokistocare aoris – type locality for species
  †Alokistocare nasutum – type locality for species
  †Ambocoelia
  †Ambocoelia gregaria
  †Ambocoelia umbonata
  †Amboneura – type locality for genus
  †Amboneura klosei – type locality for species
  †Americaspis
  †Amphiscapha
  †Amphiscapha catilloides
  †Amphissites
  †Anastomopora
  †Ancyrospora
  †Aneurospora
  †Aneurospora greggsii
  †Anisotrypa
  †Ankoura
  †Ankoura apicalis
  †Ankoura orbiculata – or unidentified comparable form
  †Ankoura sublettensis
   †Anomalocaris
  †Anomalocaris lineata
  †Anomomylacris – type locality for genus
  †Anomomylacris cubitalis – type locality for species
  †Anoplea
  †Anoplea nucleata
  †Anoplotheca
  †Anthracospirifer
  †Aparchites
  †Aparchites subrotunda
  †Aphthoroblattina
  †Aphthoroblattina fascigera – type locality for species
  †Aphyllum
  †Aphyllum fascicularium
  †Archaeopteridium
  †Archaeopteridium bellasylviana – type locality for species
  †Archaeopteris
  †Archaeopteris halliana
  †Archaeopteris latifolia
   †Archaeopteris macilenta
  †Archaeopteris minor
  †Archaeopteris roemeriana – or unidentified comparable form
  †Archaeopteris rogersi
  †Archaeosperma
  †Archaeosperma arnoldii
  †Archaeotriletes
  †Archaeotriletes senticosus
  †Archeopteris
  †Archeopteris latifolia
  †Archimylacris
  †Archimylacris parallelum
  †Archinacella
  †Armathyraster
  †Armathyraster paradoxis
  †Arthrophycus
  †Articulatae
   †Asaphiscus
  †Asaphiscus glaber
  †Asemoblatta – type locality for genus
  †Asemoblatta pennsylvanica – type locality for species
  †Astartella
  †Astartella vera
  †Atalotaenia – type locality for genus
  †Atalotaenia adela – type locality for species
  †Ateleocystites
  †Ateleocystites huxleyi
  †Athyris
  †Athyris angelica
  †Athyris spiriferiodes
  †Athyris spiriferoides
  †Atimoblatta – type locality for genus
  †Atimoblatta curvipennis – type locality for species
  †Atimoblatta flexuosa – type locality for species
  †Atimoblatta reducta – type locality for species
  †Atlanticocoelia
  †Atlanticocoelia acutiplicata
  †Atrypa
  †Atrypa recticularis
   †Atrypa reticularis
  †Aulocystis
  †Auroraspora
  †Auroraspora hyalina
  †Auroraspora macra
  †Auroraspora solisorta
  †Auroraspora torquata
  †Aviculopecten
  †Aviculopecten bellus
  †Aviculopecten equilatera
  †Aviculopecten occidentalis
caption: Restorative model of the Cambrian arthropod Anomalocaris
exif: {}