Hyoliths with arms are mainly only known from localities like the Burgess Shale or Chengjiang. Here is a specimen from the Wheeler Shale of Utha. | |||
Location: | Millard Co., Utah, USA | ||
| Size Fossil: | about 18 mm long | ||
| Age: | Middle Cambriun, Wheeler Fm. (about 518 Mill. Y.) | ||