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Climactichnites
''Climactichnites'' is an enigmatic, Cambrian fossil formed on or within sandy tidal flats around .
It has been interpreted in many different ways in the past, but is now known to be a trace fossil of a slug-like organism, thought to have moved by crawling to on-shore surfaces, or near-shore, or burrowing into the sediment.
==Morphology==
There are two species within this ichnogenus, ''C. wilsoni'' and'' C. youngi''. ''C. wilsoni'' consists of paired lateral ridges between which are undulating bars and furrows oriented at an angle to the direction of travel, whereas ''C. youngi'' lacks the paired lateral ridges and consists only of undulating transverse bars and furrows. An additional trace fossil, called ''Musculopodus'', is sometimes found at the beginning of ''Climactichnites'' trails and represents the body imprint of the animal while it was stationary.〔 ''Climactichnites'' range from 0.8 to 30 cm wide and may exceed ten feet long, making ''Climactichnites'' by far the largest Cambrian trace fossil.〔 Based on measured ratios of ''Musculopodus'' imprints, the animal itself is estimated to have reached 69 cm long.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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