Found in Blacksmith Canyon, UT area. Research indicates there are exposures of Cambrian in/near this formation. Burgess Shale type Cambrian fossils are found nearby in the Wellsville mountains. Wondering if could be Yuknessia or Sphenoecium.
References:
https://kumip.ku.edu/cambria.../Utah-Localities&Geology.html
http://www.thefossilforum.com/index.php?/topic/58341-utah-fossil-id-not-the-trilobite/
https://core.ac.uk/download/pdf/32568435.pdf
https://www.researchgate.net/publication/331617957_The_Spence_Shale_Lagerstatte_an_Important_Window_into_Cambrian_Biodiversity