page_title: List of the Mesozoic life of Montana
section_title: B
hierarchical_section_title: List of the Mesozoic life of Montana / B
caption_attribution_description: English: Skeletal reconstruction of Bambiraptor feinbergi.
context_page_description: This list of the Mesozoic 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 252.17 and 66 million years of age.
context_section_description: †Baculatisporites
   †Baculites
  †Baculites asper
  †Baculites codyensis
  †Baculites compressus
  †Baculites mariasensis
  †Baena
  †Baena callosa – type locality for species
  †Baioconodon
  †Baioconodon nordicus – or unidentified comparable form
  †Bakevellia
   †Bambiraptor – type locality for genus
  †Bambiraptor feinbergi – type locality for species
  Barbourula – or unidentified comparable form
  †Basilemys
  †Basilemys sinuosa – type locality for species
  †Batodon
  †Batodon tenuis
  †Belfria – type locality for genus
  †Belfria microphylla – type locality for species
   †Belonostomus
  †Belonostomus longirostris
  †Bernissartia
  †Biretisporites
  †Biretisporites deltoideus
  †Borealosuchus
  †Borealosuchus sternbergii
  †Boremys
  †Boremys pulchra
  †Borissiakoceras
  †Borissiakoceras orbiculatum
  Brachaelurus
  †Brachaelurus estesi
  †Brachyceratops – type locality for genus
  †Brachyceratops montanensis – type locality for species
  †Brachychampsa – type locality for genus
  †Brachychampsa montana – type locality for species
  †Brachychampsa montanus
   †Brachylophosaurus
  †Brachylophosaurus canadensis – type locality for species
  †Buccinammonites – type locality for genus
  †Buccinammonites minimus – type locality for species
caption: Diagram of the known fossil material of the Late Cretaceous dromaeosaurid ("raptor") Bambiraptor
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