Revision of a Cedarina

Before the revision: ugly residues of glue
around the fossil, inaccurate restoration and rough
chisel marks on the matrix

Before the revision: ugly residues
of glue around the fossil, inaccurate
restoration and rough chisel marks
on the matrix

Even the surface of the shell is "glued"

Even the surface
of the shell is "glued"

After the revision: the superfluous glue was removed,
the restorations of the long pleural spine and the right cheek spine
have been correctly renewed and the matrix smoothed

After the revision: the superfluous glue
was removed, the restorations of the
long pleural spine and the right cheek
spine have been correctly renewed
and the matrix smoothed

For comparison: before (left) and after (right) the revision

For comparison:
before (left) and after (right) the revision

Cedarina schachti is an extremely rare trilobite from the famous Weeks formation in Utah. This specimen was badly glued, roughly worked out and lost parts of the main spine and the right cheek spine were inaccurately restored.

During the revision of the fossil, excess glue was first removed, which was also smeared on the surface of the shell. Then it was time to correct the restoration, which is now much less noticeable and blends harmoniously with the fossil. Finally, the matrix was smoothed to get a better contrast to the fossil. Due to the revision, the new appearance is finally doing justice to the rarity and good preservation of this trilobite.

Fossil: Cedarina schachti

Locality: Northern House Range, Millard County, Utah (USA)

Formation: Cambrian, Weeks-Formation

Length of the fossil: 1.9 cm (0,74 inch)

Work required: 2 hours

Collection: Yuxi Wang