page_title: List of the Mesozoic life of Arizona
section_title: S
hierarchical_section_title: List of the Mesozoic life of Arizona / S
caption_attribution_description: English: Sonorasaurus thompsoni English: Sonorasaurus thompsoni
context_page_description: This list of the Mesozoic life of Arizona contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Arizona and are between 252.17 and 66 million years of age.
context_section_description: †Sarahsaurus – type locality for genus
  †Sarahsaurus aurifontanalis – type locality for species
  Scalpellum – tentative report
  †Scaphites
  †Scaphites larvaeformis
  †Sciponoceras
  †Sciponoceras gracile
  †Scutarx – type locality for genus
  †Scutarx deltatylus – type locality for species
  †Scutellosaurus – type locality for genus
  †Scutellosaurus lawleri – type locality for species
  †Segisaurus – type locality for genus
  †Segisaurus halli – type locality for species
  †Selaginella
  †Selaginella anasazia – type locality for species
   †Semionotus – or unidentified comparable form
  †Senis
  †Senis elongatus
  †Sergipia
  †Sergipia hartti – tentative report
  Serpula
  †Serpula implicata
  †Serpula intrica
  †Serpula large
  †Shuvosaurus
  †Shuvosaurus inexpectatus
  †Sinzowiella
  †Sinzowiella spathi
  †Smilosuchus – type locality for genus
  †Smilosuchus adamanensis – type locality for species
  †Smilosuchus gregorii – type locality for species
  †Smilosuchus lithodendrorum – type locality for species
  Solemya
  †Solemya obscura
   †Sonorasaurus – type locality for genus
  †Sonorasaurus thompsoni – type locality for species
  †Spathites
  †Spathites puercoensis
  Spirorbis
  Squilla – tentative report
  †Stagonolepis
  †Stanocephalosaurus – type locality for genus
  †Stanocephalosaurus birdi – type locality for species
  †Stanocephalosaurus new species – informal
  †Stoliczkaia
  †Stoliczkaia scotti
  †Stomohamites
  †Stylocyathus
  †Sumitomoceras
  †Sumitomoceras conlini
  †Synaptichnium
  †Synaptichnium cameronensis – type locality for species
  †Synaptichnium diabloensis – type locality for species
  †Syncyclonema
  †Syncyclonema spp.
  † Syntarsus
caption: Life restoration of the Early-Late Cretaceous brachiosaur Sonorasaurus
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