Wen-Huang:

Affinity with trace fossil Spirophycus is suggested. "Deep sea environment" is a favored term used but absolute bathymetry remains a guess. See this link for discussions:

Best

Syed

Chapter Chapter 21. Deep-Sea Fans

Maybe ask Rene Hoffmann or Richard Hofmann for further advice.

This could be Helminthopsis, a characteristic deep-marine trace fossil.

Dear Dr. Zandkarimi,

Thank you very much for your answer. Can you designated a genus name for this fossil?

Best Regards

Wen-Huang

Dear Syed,

Thank you very much for your suggestion. Indeed, I also find some bathyal to abyssal benthonic foraminifers in this formation.

Best Regards

Wen-Huang

Dear Dr. Knaust,

Thank you very much for your suggestion. When I see this fossil, I also think it is Helminthopsis but I'm not sure.

Best Regards

Wen-Huang

Given what you provided, Helminthopsis? appears to be a reasonable assignment.

I think there may be more than one ichnotaxa here. Helminthopsis is a solid diagnosis for the traces displaying a smooth arcuate meander. However, there are some traces where there are more abrupt/sharp changes in direction (close to the edge of the shadow on the photo) which also potentially displaying branching. I think this may be a relatively poorly preserved form of Megagrapton. An association of these taxa would generally support a deep-marine/turbiditic setting.

Hope this helps and best regards!

John

I think you can ask to Drs. Mángano and Buatois. they made this book: https://www.springer.com/gp/book/9789401795999. They are specialist in ichnotaxas. Probably can tell you much more about your sample. Regards!