trilobite
['hen-of-the-woods, hen of the woods, Polyporus frondosus, Grifola frondosa', 'ground beetle, carabid beetle', 'hourglass', 'leatherback turtle, leatherback, leathery turtle, Dermochelys coriacea', 'sturgeon', 'projectile, missile', 'harvestman, daddy longlegs, Phalangium opilio']