One of the mysteries of the English language finally explained.
A fossilized trail or trace fossil occurring in Cambrian sandstone and attributed to an early slug-like organism; (also) an organism responsible for such a trail. Now only (in form Climactichnites) as an ichnogenus name.
Mid 19th century; earliest use found in Quarterly Journal of the Geological Society of London. From scientific Latin Climactichnites, genus name, irregularly from ancient Greek κλῖμαξ ladder + ἴχνος footstep + scientific Latin -ites.
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