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The fish swimming trace Undichna unisulca from the Silurian of Sweden: probably the oldest vertebrate locomotion trace fossil

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The fish swimming trace Undichna unisulca is reported from a sandstone block collected from the Upper Silurian (Ludlow) Burgsvik Formation of Gotland, Sweden. It represents the oldest record of a vertebrate trace (apart from coprolites), predating previous finds from the Lower Devonian by at least 10 Ma. A thelodont or acanthodian fish may have produced the sinusoidal trails with the aid of their caudal or anal fins while browsing slowly over the sediment whilst searching for food.
Original languageEnglish
Pages (from-to)469-472
Number of pages4
JournalLethaia
Volume51
Issue number4
Early online date8 May 2018
DOIs
Publication statusPublished - Oct 2018

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  • The fish swimming trace

    Rights statement: This is the peer reviewed version of the following article: Knaust, D. & Minter, N.J. 2018: The fish swimming trace Undichna unisulca from the Silurian of Sweden: probably the oldest vertebrate locomotion trace fossil. Lethaia, https://doi.org/10.1111/let.12272, which has been published in final form at https://onlinelibrary.wiley.com/doi/abs/10.1111/let.12272. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

    Accepted author manuscript (Post-print), 817 KB, PDF document

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