Beecher Bed trilobite at gem and mineral show

http://www.fossilmall.com/fossil-shows/tucson/TucsonFossilShow.htm

Anomalocaris fossil, Burgess Shale

http://burgess-shale.rom.on.ca/en/science/burgess-shale/03-fossils.php

Beecher Bed Trilobite, Pyritized

Agaricocrinus americanus

Crawfordsville, IN

http://www.fossilmuseum.net/index.htm

Ophiocordyceps is a parasitic fungus of ants like Camponotus leonardi. Fossil foliage reveals that this relationship has existed for at least 48 million years.

http://news.sciencemag.org/sciencenow/2010/08/scienceshot-zombies-thrived-on.html?ref=hp

Crinoid fossils with red arrow indicating arm lost to predation.

Crinoids were heavily preyed upon when fishes and sharks began diversifying, so crinoids began to develop thicker armor and spines.

http://news.sciencemag.org/sciencenow/2004/09/03-01.html

Crinoids

http://asoldasthehills.org/Echinoderms.html

Diania cactiformis is a 520 million year old organism with 20 legs, and possibly the closest relative to arthropods. Its body is soft, while its legs are hard and covered in spines. Though it doesn’t appear to have eyes, a mouth, or a head, it does have jointed legs.

http://blogs.discovermagazine.com/notrocketscience/2011/02/23/meet-diania-the-walking-cactus-an-early-cousin-of-lifes-great-winners/

This is probably one of the nicest crinoid fossils I’ve seen.

Lyriocrinus melissa of Waldron Shale Formation

check out more detailed picstures here:

http://weekstrilobites.com/Lyrocrinus.htm

Silurian crinoid arm found in Waldron Shale of Indiana