Superb Gogia Eocrinoid From Middle Cambrian Utah

Gogia spiralis

Phylum Echinodermata, Eocrinoidea

Geological Time: Middle Cambrian

Size (25.4 mm = 1 inch): Fossil is 47 mm long with 13 mm stem and 38 mm wide on a 90 mm by 80 mm matrix

Fossil Site: Wheeler Formation, Millard County, Utah

Fossil Code: EC104

Price: $95.00

Description: Coming from the Cambrian Wheeler Formation deposits of Millard County, Utah this is a fine example of Gogia spiralis, a member of the Class Eocrinoidea. Eocrinoids (“dawn crnoids”), were among the earliest groups of Echinoderms. They had a vase-shaped body (calyx), covered by plates that were symmetrical and had a bifurcated brachiole, a slender arm-like structure for food-gathering that closely resembled those in cystoids. The early Eocrinoids were attached to the bottom by a thick holdfast. Later members had an elongated stalk much like the true crinoids which evolved later. This is a fine example which is well-centered on its matrix block. Once Gogia matured past the 4-armed stage (the species derives its name from the spiraled arms), they added arms in such a way as to have an odd-numbered total.

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