30807 - Nicely Preserved 0.79 Inch Onnia sp Ordovician Trilobite Prionocheilus Up parallel and down crossed
Yard notes & kiln story
Description
Up parallel and down crossed nicols
where the organic matter has difficulty decomposing
Shergoldiella
Yale University
United States (4: Massachusetts
30807 - Nicely Preserved 0.79 Inch Onnia sp Ordovician Trilobite Prionocheilus Up parallel and down crossedOnnia 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