Trilobites
Order Agnostida , Suborder Eodiscina, Superfamily Eodiscoidea,
Family Eodiscidae
Geologic Age: Early Cambrian, (~520 million years ago)
Trilobites are 6 and 4.5 mm long
Stephen Formation, Burgess Shale, Burgess Pass, British Columbia, Canada
Remarks:
The eodiscids, and particularly the pagetiids, as seen here, exhibit features
that may link agnostids to more traditional trilobites, specifically, the
articulation and dorsal facial sutures in some species. They also share isopygous
agnostid cephalic and pygidial features (Fortey,
2001).
Also see: Canadian Trilobites
