page_title: List of the Mesozoic life of Utah
section_title: S
hierarchical_section_title: List of the Mesozoic life of Utah / S
caption_attribution_description: English: Cropped image of taxon in file name
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: †Sabalites
  †Sabalites NE008 – informal
  Salix
  †Salix newberryana
   †Sauropelta – or unidentified comparable form
  †Scapherpeton
  †Schillerosaurus – type locality for genus
  †Schillerosaurus utahensis – type locality for species
  †Sciponoceras
  †Sciponoceras gracile
  †Scotiophryne
  †Scotiophryne pustulosa
  †Scoyenia
   †Seitaad – type locality for genus
  †Seitaad ruessi – type locality for species
  †Sementiconcha – type locality for genus
  †Sementiconcha recuperator – type locality for species
  †Semionotus
  †Semionotus kanabensis – type locality for species
  Serpula
  †Serpula intrica
  †Serpula large
  †Sexta
  †Sexta navicula – or unidentified related form
   †Siats – type locality for genus
  †Siats meekerorum – type locality for species
  †Simplicidium
  †Sinbadelphys
  †Sinbadelphys schmidti
  †Sinbadiella – type locality for genus
  †Sinbadiella pygmaea – type locality for species
  †Skolithos
  †Sohlites
  †Sohlites spinosus
  Solemya
  †Solemya obscura
  †Soleniscus
  †Spalacolestes
  †Spalacolestes cretulablatta
  †Spalacolestes inconcinnus – type locality for species
  †Spalacotheridium – type locality for genus
  †Spalacotheridium mckennai – type locality for species
  †Spalacotheridium noblei
   †Spheroolithus
  †Spheruprismatoolithus – type locality for genus
  †Spheruprismatoolithus condensis
  †Spheruprismatoolithus condensus – type locality for species
  Spirorbis – report made of unidentified related form or using admittedly obsolete nomenclature
  †Spirorbis valvata – or unidentified comparable form
  †Spongioolithus – type locality for genus
  †Spongioolithus hirschi – type locality for species
  †Squatirhina
  †Squatirhina americana
  †Stagonolepis
  †Stegopodus – type locality for genus
  †Stegopodus czerkasi – type locality for species
   †Stegosaurus
  †Stegosaurus stenops – or unidentified comparable form
  †Stegosaurus ungulatus
  †Stellatochara
  †Stellatochara obovata
  †Stemmatoceras
  †Stemmatoceras albertense – or unidentified related form
  †Stemmatoceras arcicostum
  †Stephanoceras
  †Stephanoceras nodosum – or unidentified related form
   †Stokesosaurus – type locality for genus
  †Stokesosaurus clevelandi – type locality for species
  Stomatopora
  †Stomohamites
  †Strobeus
  †Strobeus batteni
  †Submeekoceras
  †Submeekoceras mushbachanum
  †Symmetrocapulus – tentative report
  †Symmetrocapulus corrugatus
  †Symmetrodontoides
  †Symmetrodontoides foxi – type locality for species
  †Symmetrodontoides oligodontos – type locality for species
  †Syncyclonema
  †Synorichthys
  †Synorichthys stewarti
caption: Fossils of the dinosaur egg oogenus Spheroolithus
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