Multiple Soft-Bodied Fossil Aglaspids (Tremaglaspis) - Morocco
This aglaspid has frequently been referred to as Leptaglaspis schmidti in the past, but Tremaglaspis appears to be more accurate.
Aglaspids are a rare type of arthropod which was probably related to trilobites. For a while was regarded as the ancestors to horseshoe crabs, though this theory has fallen out of favor.
A paper on these aglaspids can be found at the link below.
Ordovician faunas of Burgess Shale type