page_title: List of the Mesozoic life of Alaska
section_title: A
hierarchical_section_title: List of the Mesozoic life of Alaska / A
caption_attribution_description: English: Alaskacephale
context_page_description: This list of the Mesozoic life of Alaska contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Alaska and are between 252.17 and 66 million years of age.
context_section_description: Acila
  †Actinoceramus
  †Actinoceramus concentricus
  †Actinoceramus sulcatus
   †Alaskacephale – type locality for genus
  †Alaskacephale gangloffi – type locality for species
  †Allocotidus – type locality for genus
  †Allocotidus bruesi – type locality for species
  †Alpinophyllia
  †Alpinophyllia flexuosa
  †Amaltheus
  †Amblydactylus
  †Amblysiphonella
  †Amoeboceras
  †Ampakabastraea
  †Ampakabastraea cowichanensis
  †Ampakabastraea nodosa – or unidentified comparable form
  Amusium
  †Anagaudryceras
  †Anagaudryceras auranium
  †Anagaudryceras aurarium
  †Anagaudryceras inflatus
  †Anagaudryceras sacya – type locality for species
   †Anapachydiscus
  †Anapachydiscus nelchinensis – type locality for species
  †Anatomites
  †Anatomites externiplicatus
  †Anatomites septentrionalis – type locality for species
  †Andangularia
  †Andangularia wilsoni – type locality for species
  †Anomia
  †Anoptychia – tentative report
  †Anthostylis
  †Anthostylis acanthophora
  †Antiquilima – tentative report
  †Aopullina – tentative report
  †Aquilapollenites
  †Aquilapollenites decorus
  †Aquilapollenites fusiformis
  †Aquilapollenites quadrilobus
  †Aquilapollenites reticulatus
  †Aquilapollenites scabridus
  †Arcestes
  †Archaeocidaris – tentative report
  †Archaeodictyomitra
  †Archaeodictyomitra exigua – type locality for species
  †Archaeospongoprunum
  †Archaeospongoprunum helense – type locality for species
  †Arcthoplites
  †Arcthoplites belli
  †Arcthoplites talkeetnanus
  Arctica – tentative report
   †Arcticoceras
  †Arctocephalites
  †Arctocephalites alticostus
  †Arctocephalites costidensus – type locality for species
  †Arctocephalites pompeckji
  †Arctoceras
  †Arctoceras blomstrandi
  †Arctoceras tuberculatum
  †Arctoceras tuberculatus
  †Arctopteris
  †Arctopteris kolymensis – or unidentified related form
  †Arctopteris rarinervis
  †Areaseris
  †Areaseris nevadensis
  †Arieticeras
  †Arieticeras domarense – or unidentified related form
   †Arnioceras
  †Arnioceras arnouldi – or unidentified comparable form
  †Arpadites – tentative report
  †Aspenites
  †Aspenites acutus
  Astarte
  †Astarte carlottensis
  †Asthenoceras
  †Asthenoceras nannodes – or unidentified related form
  †Astraeomorpha
  †Astraeomorpha confusa
  †Astraeomorpha crassisepta
  †Astrocoenia – tentative report
  †Atractites
  †Atreta
  †Aucella
  †Aucella okensis
  †Aucella spitiensis
  †Aucella subokensis
  †Aucellina
  Avicula
  †Avicula soperi
   †Aviculopecten
  †Azonia
  †Azonia cribrata
  †Azonia pulchella
  †Azonia strictiparva
caption: Life restoration of the Late Cretaceous dome-headed dinosaur Alaskacephale and inset diagram depicting it with an anachronistic human to scale
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