Changaspis elongata - recent Ebay acquisition.

An example of the Chinese Early Cambrian trilobite, Changaspis elongata.

I recently purchased this on Ebay - was a great deal, and I really like spiny trilos.

Couldn't pass it up.

There are 9 trilobites or imprints visible on the matrix - (Mostly complete) many of which appear to be a different species, Arthricocephalus chauveaui. (perhaps meraspid forms of Arthricocephalus.)

Although they are tiny, they are cool looking, ...at least to me.

Interesting PDF:

ONTOGENY AND HETEROCHRONY IN THE EARLY CAMBRIAN ORYCTOCEPHALID TRILOBITES CHANGASPIS,

DUYUNASPIS AND BALANGIA FROM CHINA by KENNETH J. McNAMARA*, FENG YU! and ZHOU ZHIYI!

and

Ontogeny and Heterochrony in the Oryctocephalid Trilobite Arthricocephalus from the Early Cambrian of China.

As always, right click and select "Large" for best viewing.