Treptichnus Temporal range:
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Burrows viewed from the side | |
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Burrows viewed obliquely | |
Trace fossil classification ![]() | |
Ichnogenus: | †Treptichnus Miller, 1889 |
Ichnospecies | |
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Synonyms[2][3] | |
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Treptichnus (formerly named Phycodes, Manykodes by J. Dzik,[2] and also known as Trichophycus[3]) is the preserved burrow of an animal. As such, it is regarded as the earliest widespread complex trace fossil. Its earliest appearance, around 542 million years ago (mya),[4] which was contemporaneous with the last of the Ediacaran biota, is used to help define the dividing line, considered geologically at 541 mya, between the Ediacaran and Cambrian periods.[5][6] It is last seen in the fossil record during the Cenomanian (99.7 mya).[1]
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