Keywords: Densastroma pexisum section.jpg en Densastroma pexisum a stromatoporoid from the Silurian of Saaremaa Island Estonia In the upper left is the boring Osprioneides 2014-12-29 12 46 36 own Wilson44691 other versions cc-zero Uploaded with UploadWizard Silurian fossils Silurian Animalia Fossils of Estonia Stromatoporoidea fossils Trace fossils |