Colonel William A. Phillips

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"The slightest amount of sediment would trigger their senses, and Phacops rana would be hidden in a tiny shelter made of its own body. Although this safety feature often helped them to evade predators, occasionally it backfired and the trilobite would be buried under heavy sediment. Their fossils can still be found in balled-up positions 400 million years later."

Isn't that highly speculative? It's hard to judge how sensitive a creature's senses were when said creature went extinct 251 million year ago. Fossils of curled-up Trilobites might have occured like this, but I think it's a bit much to leap and use it to explain all curled-up fossils. 01:47, 27 August 2007 (UTC)

This should be merged into Phacops. FunkMonk (talk) 12:15, 11 February 2010 (UTC)[reply]