30633 - Well Preserved 0.79 Inch Scabriscutellum sp Middle Devonian Trilobite Reptile Fossils Under Study with a circular basal cross-section

with a circular basal cross-section

Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra

Cyphinioides

Flexicalymene meeki: Fossilworks (Paleobiology Database)

Norasaphus

30633 - Well Preserved 0.79 Inch Scabriscutellum sp Middle Devonian Trilobite Reptile Fossils Under Study with a circular basal cross-sectionScabriscutellum, Richter and Richter 1956 (trilobite) Trilobita Corynexochida Styginidae Ecology: nektobenthic carnivore Environments: marine, deep subtidal, shallow subtidal, reef, buildup or bioherm Age range: 409. 1 to 383. 7 Ma Distribution: Daleje of the Czech Republic Devonian of the Czech Republic, France, Germany, Morocco