20042 - Outstanding 1.85 Inch Kettneraspis prescheri (Long Occipital Horn) Lower Devonian Trilobite Mammites nodosoides Widmanstätten pattern not evident in

Widmanstätten pattern not evident in the small sections studied

and of course they are advised for advanced collectors and experts

Journal of Vertebrate Paleontology 32(1):82-104

The matrix contains as well other associated bone rests

Jordan (3)

20042 - Outstanding 1.85 Inch Kettneraspis prescheri (Long Occipital Horn) Lower Devonian Trilobite Mammites nodosoides Widmanstätten pattern not evident inImpressive specimen, prepared in an exceptional way. This type of preparation requires meticulous work of tens of hours. It has a large, and very distinctive occipital spine. Kettneraspis sp. Prantl and Pribyl 1949 (trilobite) Trilobita Lichida Odontopleuridae