Echinodermata, Subphylum Blastozoa, Class Eocrinoidea (also called
Dawn Crinoid, or Eocrinoid)
Order Ptychopariida, Family Menomoniidae
Time: Middle Cambrian
65mm for perspective, Bolaspidella 9 mm, brachiopods 2 mm
Site: Wheeler Shale, Millard County, Utah
Gogia is Cambrian cystoid that is among the earliest and most primitive
groups of echinoderms. For this reason they are sometimes called
a "dawn crinoids". They had a vase-shaped body (calyx),
covered by plates that were symmetrical and have a bifurcated brachiole,
a slender arm-like structure for food-gathering that closely resembled
those in cystoids.
association plate contains three complete dawn crinoids, in addition
to a Bolaspidella housensis trilobite and a few tiny brachiopods,
three distinct marine creatures coming out of the Cambrian explosion.
see: Utah Cambrian Explosion