07757 - Top Quality 0.75 Inch Onnia sp Ordovician Trilobite Coltraneia That is why only the

That is why only the most robust bones or the most stable parts are usually preserved

vesicular masses

In the matrix that still surrounds the tooth

The pathological deformations in this species and in this place are very rare

Precious natural association of 2 vertebrae bones of this huge Paleocene shark

07757 - Top Quality 0.75 Inch Onnia sp Ordovician Trilobite Coltraneia That is why only theOnnia sp, Bancroft 1933 (trilobite) Trilobita Asaphida Trinucleidae Parent taxon: Trinucleidae according to P. A. Jell and J. M. Adrain 2002 See also Sepkoski 2002 Ecology: fast moving low level epifaunal suspension feeder Age range: 460. 9 to 443. 7 Ma