Planolites
Encyclopedia
Planolites is an ichnogenus found throughout the Phanerozoic
Phanerozoic
The Phanerozoic Eon is the current eon in the geologic timescale, and the one during which abundant animal life has existed. It covers roughly 542 million years and goes back to the time when diverse hard-shelled animals first appeared...

. Planolites are trace fossils made during the feeding process of ancient wormlike animals.
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