Wikimedi'Òc

Bryozoa 8679.jpg - Regiomontanus

IsotelusHypostome.JPG - Micha

Bryozoa Hallopora2.jpg - File Upload Bot (Magnus Manske)

Flexicalymene retrosa Ordovician Ohio.jpg - Antonov

Iocrinus subcrassus, crinoid, Late Ordovician, McMillan Formation, Butler County, Ohio, USA - Houston Museum of Natural Science - DSC01499.JPG - Daderot

Isotelus maximus, Asaphidae, Waynesville Formation, Adams County, Ohio, USA - Houston Museum of Natural Science - DSC01570.JPG - Daderot

Fossil bryozoan (Arnheim Formation, Upper Ordovician; Flat Run Quarry, Clay Township, far-sw Highland County, southwestern Ohio, USA) 1 (15023301040).jpg - Natuur12

Constellaria polystomella Liberty Formation.jpg - Wilson44691

Zygospira brachiopods in fossiliferous limestone (Point Pleasant Limestone, Upper Ordovician; Bear Creek Quarry, east of Neville, Ohio, USA) 1.jpg - Ser Amantio di Nicolao

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

Zygospira modesta (fossil brachiopods) in limestone (Upper Ordovician; southeastern Butler County, Ohio, USA).jpg - Ser Amantio di Nicolao

Isotelus maximus (fossil trilobite genal spine) (Liberty Formation, Upper Ordovician; Caesar Creek Lake's emergency spillway, Warren County, Ohio, USA).jpg - Ser Amantio di Nicolao

Tricopelta breviceps (fossil trilobite) (Upper Ordovician; Caesar Creek Lake's emergency spillway, Ohio, USA).jpg - Ser Amantio di Nicolao

Geodized fossil nautiloid (Upper Ordovician; Caesar Creek Lake's emergency spillway, 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

Geodized fossil nautiloid (Upper Ordovician; Caesar Creek Lake's emergency spillway, Ohio, USA) 3.jpg - Ser Amantio di Nicolao