Wikimedi'Òc

Dendrocrinus caduceus fossil crinoid (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, northeastern Warren County, southwestern Ohio, USA) 1 (15301593062).jpg - Natuur12

Dendrocrinus caduceus fossil crinoid (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, northeastern Warren County, southwestern Ohio, USA) 4 (15301969465).jpg - Natuur12

Dendrocrinus caduceus fossil crinoid (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, northeastern Warren County, southwestern Ohio, USA) 5 (15115409467).jpg - Natuur12

Dendrocrinus caduceus fossil crinoid (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, northeastern Warren County, southwestern Ohio, USA) 2 (15115196109).jpg - Natuur12

Dendrocrinus caduceus fossil crinoid (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, northeastern Warren County, southwestern Ohio, USA) 6 (15115257720).jpg - Natuur12

Dendrocrinus caduceus fossil crinoid (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, northeastern Warren County, southwestern Ohio, USA) 3 (15115410087).jpg - Natuur12

Flexicalymene meeki cephalon view.JPG - Wilson44691

Flexicalymene meeki pygidium view.JPG - Wilson44691

Isotelus maximus fossil trilobite (Upper Ordovician; Adams County, Ohio, USA) 1.jpg - Ser Amantio di Nicolao

Isotelus maximus fossil trilobite (Upper Ordovician; Adams County, Ohio, USA) 2.jpg - Ser Amantio di Nicolao

Isotelus maximus fossil trilobite (Upper Ordovician, Adams County, Ohio, USA) 3.jpg - Ser Amantio di Nicolao

Isotelus maximus fossil trilobite (Upper Ordovician, Adams County, Ohio, USA) 4.jpg - Ser Amantio di Nicolao

Ambonychia sp. (fossil bivalve) (Waynesville Formation, Upper Ordovician; Roaring Run, Warren County, Ohio, USA).jpg - Ser Amantio di Nicolao

Ctenodonta sp. (fossil bivalve) (Waynesville Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA).jpg - Ser Amantio di Nicolao

Nautiloid cephalopod in limestone (Waynesville Formation, Upper Ordovician; Roaring Run, Warren County, Ohio, USA) 2.jpg - Ser Amantio di Nicolao

Nautiloid cephalopod in limestone (Waynesville Formation, Upper Ordovician; Roaring Run, Warren County, Ohio, USA) 1.jpg - Ser Amantio di Nicolao

Nautiloid in fossiliferous limestone (Waynesville Formation or Liberty Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA).jpg - Ser Amantio di Nicolao

Flexicalymene retorsa minuens cephalon.jpg - Dwergenpaartje

Orthonybyoceras duseri, Late Ordovician, Waynesville Formation, Warren County, Ohio, USA - Houston Museum of Natural Science - DSC01658.JPG - Daderot