page_title: List of the Mesozoic life of North Dakota
section_title: A
hierarchical_section_title: List of the Mesozoic life of North Dakota / A
caption_attribution_description: fossil skeleton of Archelon, a giant Cretaceous turtle
context_page_description: Acipenser
  †Adocus
  †Aletridelphys
  †Aletridelphys florencae
  †Alphadon
  †Alphadon marshi
  †Altacreodus
  †Altacreodus magnus
  †Amersinia
  †Amersinia FU082 – informal
  †Amersinia FU82 – informal
  †Amesoneuron
  †Amesoneuron FU037 – informal
  †Amesoneuron FU37 – informal
  †Ampelopsis
  †Ampelopsis acerifolia
  † Anomia
  †Anomia gryphorhyncha
  †Anzu
  †Anzu wyliei
  †Araliaephyllum
  †Araliaephyllum polevoi
  †Archelon
  †Artocarpus
  †Artocarpus lessigiana
  †Asimina
  †Asimina knowltonia
  Aspideretes
  Atractosteus
  †Avisaurus – or unidentified comparable form
  †Avisaurus archibaldi
  †Axestemys
  †Axestemys splendida
  Azolla
  †Azolla gigantea – type locality for species
context_section_description: Acipenser
  †Adocus
  †Aletridelphys
  †Aletridelphys florencae
   †Alphadon
  †Alphadon marshi
  †Altacreodus
  †Altacreodus magnus
  †Amersinia
  †Amersinia FU082 – informal
  †Amersinia FU82 – informal
  †Amesoneuron
  †Amesoneuron FU037 – informal
  †Amesoneuron FU37 – informal
  †Ampelopsis
  †Ampelopsis acerifolia
  † Anomia
  †Anomia gryphorhyncha
  †Anzu
  †Anzu wyliei
  †Araliaephyllum
  †Araliaephyllum polevoi
   †Archelon
  †Artocarpus
  †Artocarpus lessigiana
  †Asimina
  †Asimina knowltonia
  Aspideretes
  Atractosteus
  †Avisaurus – or unidentified comparable form
  †Avisaurus archibaldi
  †Axestemys
  †Axestemys splendida
  Azolla
  †Azolla gigantea – type locality for species
caption: Mounted fossilized skeleton of the Late Cretaceous sea turtle Archelon
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