The Natural Canvas Fossils / 5730 Fossil Echinoderms - Echinoids, Crinoids, Cystoids, Carpoids, Starfish and other extinct forms Purchase here: ncanvas@aol.com

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Big Helicoplacoid

Early Cambrian, California, USA

Helicoplacus gilberti -- 42mm helicoplacoid echinoderm on 76mm x 49mm slab. Huge for this genus. Probably the largest we have ever had. Helicoplacoids are among the most primitive echinoderms known and are found complete only in California.

$529