30273 - Outstanding 1.70 Inch Kettneraspis prescheri (Long Occipital Horn) Lower Devonian Trilobite Thescelosaurus 674’W Mass (g): >7000 Pieces:

674’W Mass (g): >7000 Pieces: many Class: Martian (shergottite) Shock stage: moderate Weathering grade: very low Fayalite (mol%): 19

this is a very educational specimen

showing some amazing features

Contracheirurus

The details of the anatomy of the superficial osseous structure of the root are extremely well preserved

30273 - Outstanding 1.70 Inch Kettneraspis prescheri (Long Occipital Horn) Lower Devonian Trilobite Thescelosaurus 674’W Mass (g): >7000 Pieces:Impressive 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