page_title: List of the Mesozoic life of Utah
section_title: I
hierarchical_section_title: List of the Mesozoic life of Utah / I
caption_attribution_description: English: Life restoration of Iguanacolossus fortis. Polski: Rekonstrukcja przyżyciowa Iguanacolossus fortis.
context_page_description: This list of the Mesozoic life of Utah contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Utah and are between 252.17 and 66 million years of age.
context_section_description: †Icacinoxylon
  †Icacinoxylon pittiense – type locality for species
  †Idahocolumbites
  †Idahocolumbites cheneyi
   †Iguanacolossus – type locality for genus
  †Iguanacolossus fortis – type locality for species
  †Iguanodon
  †Iguanodon ottingeri – type locality for species
  Ilex
  †Ilex serrata
   †Inoceramus
  †Inoceramus albertensis – or unidentified comparable form
  †Inoceramus flavus
  †Inoceramus gilberti
  †Inoceramus koeneni
  †Inoceramus pictus
  †Inoceramus tenuistriatus – tentative report
  †Inoceramus undabundus
  †Inyoites
  †Inyoites beaverensis – type locality for species
  †Inyoites oweni
  †Iqualadelphis
  †Iqualadelphis lactea
  †Iridotriton – type locality for genus
  †Iridotriton hechti – type locality for species
  †Ischyrhiza – or unidentified comparable form
  Isocrinus
  †Isocrinus nicoleti
   Isognomon
  †Isognomon perplana – or unidentified comparable form
  †Iugomortiferum – type locality for genus
  †Iugomortiferum thoringtoni – type locality for species
caption: Life restoration of the Early Cretaceous Iguanodon relative Iguanacolossus
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