30799 - Well Prepared 0.83 Inch Onnia sp Ordovician Trilobite Chalcedonized Gastropods 7 g Classification
Baker’s notes & crumb story
Description
7 g Classification
Mass:help 75
Arambourg and Joleaud 1943
Toernquistina
Enchodus saevus
30799 - Well Prepared 0.83 Inch Onnia sp Ordovician Trilobite Chalcedonized Gastropods 7 g ClassificationOnnia 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