07758 - Nicely Preserved Mass Mortality Plate 4 Onnia sp Ordovician Trilobites Hexanchus with secondary growth of irregularly-shaped
Yard notes & kiln story
Description
with secondary growth of irregularly-shaped (to 1 mm) kamacite
University of Alberta
Anetoceras arduennense
They corresponds with the family Lichidae and Phacopidae
This beautiful intact Prognathodon tooth is preserved in exceptional way
07758 - Nicely Preserved Mass Mortality Plate 4 Onnia sp Ordovician Trilobites Hexanchus with secondary growth of irregularly-shapedOnnia 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