Английская Википедия:Arenicolites

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Файл:Arenicolites bedding plane.jpg
Trace fossils of Arenicolites in the bedding plane. Trace appears as pairs of circles. Scale bar=2 cm.
Файл:Arenicolites verticle slice.jpg
Arenicolites in vertical plane. The rock is cut with a rock saw with two oblique cuts. Scale bar = 1 cm.

Arenicolites is a U-shaped ichnotaxon (trace fossil)[1] dating from Ediacaran times onwards in South Australia. The trace shown by this fossil, is a pair of closely spaced circles on a bedding plane. In vertical section the traces are U- or J-shaped. They appear to be burrows made by a kind of worm.[2]

References

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Шаблон:Trace-fossil-stub