30548 - Beautiful 1.26 Inch Flexicalymene retrorsa Ordovician Trilobite - Ohio USA Xystridura templatonensis Environments: offshore

Environments: offshore

PaleoDB taxon number: 157283

they are the most oxygen-poor silicate rocks known

Arizona State University

Subtaxa: Arthricocephalus (Arthricocephalites)

30548 - Beautiful 1.26 Inch Flexicalymene retrorsa Ordovician Trilobite - Ohio USA Xystridura templatonensis Environments: offshoreFlexicalymene retrorsa, Foerste 1910 PaleoDB taxon number: 367465 Alternative combination: Calymene meeki retrorsa Full reference: A. F. Foerste. 1910. Preliminary notes on Cincinnatian and Lexington fossils of Ohio, Indiana, Kentucky, and Tennessee. Bulletin of the Scientific Laboratories of Denison University 16(1): 17 100 Belongs to Flexicalymene according to B. R. Hunda and N. C. Hughes 2007 See also Foerste 1910 Sister taxa: Flexicalymene