Temporal range:
Burrows viewed from the side
Burrows viewed obliquely
Trace fossil classification Edit this classification
Ichnogenus: Treptichnus
Miller, 1889
  • T. apsorum Rindsberg & Kopasa-Merkel, 2005[1]
  • T. bifurcus Miller, 1889
  • T. pedum Seilacher, 1955
  • Phycodes
  • Manykodes
  • Trichophycus
  • Affinovendia

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 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 Ma).[1]

  1. ^ a b AK Rindsberg and DC Kopaska-Merkel. 2005. Treptichnus and Arenicolites from the Steven C. Minkin Paleozoic Footprint Site (Langsettian, Alabama, USA). Alabama Paleontological Society Monograph 1 : 121-141
  2. ^ a b DZIK, Jerzy (2005). "Behavioral and anatomical unity of the earliest burrowing animals and the cause of the "Cambrian explosion"" (PDF). Paleobiology. 31 (3): 503–521. doi:10.1666/0094-8373(2005)031[0503:BAAUOT]2.0.CO;2.
  3. ^ a b See e.g. paleodiversity in Baltoscandia: Trichophycus pedum
  4. ^ Srivastava, Purnima (June 2012). "Treptichnus pedum: An Ichnofossil Representing Ediacaran - Cambrian Boundary in the Nagaur Group, the Marwar Supergroup, Rajasthan, India" (PDF). Proc. Indian Natl. Sci. Acad. 78 (2): 161–169. Retrieved April 8, 2016.
  5. ^ Subcommission on Neoproterozoic Stratigraphy - URL retrieved June 22, 2009
  6. ^ International Commission on Stratigraphy, International Chronostratigraphic Chart, 2012,

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