The Natural Canvas Fossils / 1637 Fossil of Softbodied Invertebrates - Arthropods, Worms, Jellyfish and Precambrian problematica Purchase here: ncanvas@aol.com

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Hyolithids

Middle Cambrian, Utah, USA

Group of several hyolithids oriented in the same direction on slab. Average size 1". Hyolithids are enigmatic animals that have variously been classified as molluscs, worms and even in their own phylum, but no clear picture has emerged.

$8