page_title: List of the Paleozoic life of Arkansas
section_title: S
hierarchical_section_title: List of the Paleozoic life of Arkansas / S
caption_attribution_description: English: Ancient in situ lycopsid, probably Sigillaria, with attached stigmarian roots. Specimen is from the Joggins Formation (Pennsylvanian), Cumberland Basin, Nova Scotia. Français&#160;: Tronc de lycopside fossilisé (probablement Sigillaria, avec collet et racines stigmariennes, trouvé dans la Formation de Joggins (Pennsylvanien), Bassin de Cumberland, Nouvelle-Écosse Deutsch: „In situ“ überlieferter Ausguss („Steinkern“) des Stumpfes eines Bärlapp-Baumes, wahrscheinlich Sigillaria, mit ansitzendem Wurzelwerk (Stigmaria). Das Exemplar befindet sich in der Joggins-Formation (Oberkarbon) des Cumberland-Beckens, Nova Scotia.
context_page_description: This list of the Paleozoic life of Arkansas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Arkansas and are between 541 and 252.17 million years of age.
context_section_description: †Sandia
  †Sanguinolites
  †Sanguinolites simulans – tentative report
  †Sansabella
  †Sansabella fayettevillensis
  †Sansabella reticulata
  †Savitrisporites
  †Savitrisporites nux
  †Schartymites
  †Schartymites paynei
  †Schellwienella
  †Schizodus
  †Schizodus chesterensis
  †Schizophoria
  †Schuchertella
  †Schulzospora
  †Schulzospora rara
  †Schumardella
  †Schumardella obsolecens
  †Sedenticellula
  †Sedgwickia
  †Seminolites
  †Septatrypa
  †Septatrypa havliceki
  †Septimyalina
  †Septimyalina perattenuata – or unidentified comparable form
  †Serenida
  †Serenida seminalis
  †Shaleria
  †Solenochilus
  †Solenochilus floweri – type locality for species
  †Solenochilus peculiare – or unidentified comparable form
  †Solenomorpha
  †Solenomorpha nitida
  †Spathelopsis – type locality for genus
  †Spathelopsis browni – type locality for species
   †Sphaerexochus
  †Sphaerexochus glaber – type locality for species
  †Sphenotus
  †Sphenotus branneri
  †Sphenotus dubius
  †Sphenotus meslerianus
  †Sphenotus pisinnus – type locality for species
  †Sphenotus washingtonensis
   †Spirifer
  †Spiriferellina
  †Staurocephalus
  †Staurocephalus lagena – type locality for species
  †Staurocephalus oarion – type locality for species
  †Stearoceras
  †Stearoceras gibbosum – or unidentified related form
  †Stearoceras smithi – type locality for species
  †Stenoglaphyrites
  †Stenoglaphyrites involutus – type locality for species
  †Stenoglaphyrites miseri – type locality for species
  †Stenopronorites
  †Sthenarocalymene
  †Sthenarocalymene scutula – type locality for species
    †Stigmaria
  †Stigmaria wedingtonensis
  †Stioderma
  †Stioderma hadra – type locality for species
  †Streptis
  †Streptis glomerata
  †Streptorhynchus
  †Strobeus
  †Stroboceras
  †Stroboceras gordoni – type locality for species
  †Stroboceras sulcatum – or unidentified comparable form
  †Sudeticeras
  †Sulcella
  †Sulcogirtyoceras
  †Sulcogirtyoceras jasperense – type locality for species
  †Sulcogirtyoceras limatum
  †Sutherlandia
  †Syngastrioceras
  †Syngastrioceras globosum
  †Syngastrioceras oblatum
  †Syngastrioceras scotti
  †Syntrophopsis
  †Syntrophopsis grandis – type locality for species
caption: Fossil preserved in situ of a Carboniferous tree-like club moss relative with attached Stigmaria rhizome system
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