species, Similodonta ceryx, Similodonta collina, Similodonta djupvikensis, Similodonta magna, Similodonta recurva, Similodonta spjeldnaesi, Similodonta wahli...

the Sinnipee Group in Dane County A mid sized bivalve mollusk called Similodonta from Dane County A mass death plate of rhynchonellid and strophomenid...

degrees. While this is similar to the related genera Palaeoconcha and Similodonta, they are both noted for anterior-posterior angles of no less than ninety...

from fossils found in early Arenig sediments of South Wales. The genus Similodonta is known from several species which range across North America, Asia...

Reed Ashgillian  Scotland transferred to Similodonta in 1964 Nucula magna. Sp nov synonym Lamont Ashgillian  Scotland transferred to Similodonta in 1964...

transferred to Similodonta in 1964 Tellinomya recurva. Sp nov synonym Lamont Ashgillian Upper Richmond Group, Minnesota  USA transferred to Similodonta in 1964...

trinucleata – or unidentified related form †Siderella †Siderella scotti †Similodonta †Similodonta hermitagensis – or unidentified related form †Sinuites †Sinuites...

the Sinnipee Group in Dane County A mid sized bivalve mollusk called Similodonta from Dane County A fossil gastropod called Clathrospira from the Sinnipee...

†Schmidtella crassimarginata †Scotoharpes †Scotoharpes telleri †Scutellum †Similodonta †Sinuites †Sinuites cancellatus †Sinuites rectangularis – type locality...

Praenuculidae Similodonta ceryx Sp nov Valid Cope Middle Ordovician Gilfach Farm No. 1 Borehole  Wales oldest species in the genus Similodonta Trigonoconcha...

Pleurotomaria †Polygrammoceras †Proetus †Sactorthoceras †Saukiella †Scutellum †Similodonta †Skenidioides †Skolithos †Sowerbyella †Sphaerexochus †Strophomena †Strophomena...

Notes Images Ctenodonta spjeldnaesi. Sp nov synonym Soot-Reyn & Soot-Reyn Late Ordovician Upper Chasmops Shale  Norway transferred to Similodonta in 1964...

locality for species †Sigillaria †Sigillaria brardii †Sigillaria elegans †Similodonta – tentative report Solemya †Solenomorpha †Sowerbyella †Sphenophyllum...

for genus †Sigournea multidentata – type locality for species †Similodonta †Similodonta obliqua †Simulodonta †Simulodonta obliqua †Sinuites †Sinuites subcompressa...

†Prototaxites †Pseudopolygnathus †Pterotheca †Quadratia †Scytalocrinus †Similodonta †Solenopora †Sowerbyella †Sphenophyllum †Sphenophyllum cuneifolium †Sphenopteris...

Name Novelty Status Authors Age Unit Location Notes Images Similodonta wahli Sp nov Valid Isakar Late Ordovician Arina Formation  Estonia...

†Rigidella †Rioceras †Scenella †Scenella compressa †Scenella obtusa †Similodonta †Skenidioides †Sowerbyella †Spyroceras †Stigmatella †Strepsodiscus †Strophomena...

†Scofieldoceras depressum †Scofieldoceras shumardi †Scyphiodus †Scyphiodus primus †Similodonta †Simulites †Simulites concinnus †Sinuites †Sinuites cancellatus †Sinuites...

Name Novelty Status Authors Age Location Notes Images Similodonta. Gen et sp nov Valid Soot-Reyn Middle Ordovician to Middle Silurian  Canada ( Quebec)...

Palaeoconcha Paulinea Pensarnia Praeleda Praenucula (type genus) Trigonoconcha Similodonta Villicumia incertae sedis Pseudonucula A number of genera which were...

locality for genus †Sigournea multidentata – type locality for species †Similodonta †Skenidioides – tentative report †Sowerbyella †Sphenothallus †Spirifer...

†Silfonocrinus †Silfonocrinus siluricus †Silicaster †Silicaster esseri †Similodonta – tentative report †Sinuites †Sinuites cancellatus †Sinuites granistriatus...