Hi. Just a hunch but looks like a flattie. Selenopidae family.
Also called wall crab spiders.
Genus Selenops – BugGuide.Net
I see where you are going with the flattie. But do you think the way the legs are arranged that we could be looking at only the front half of a large spider. I think it could be the front half of a giant crab spider? Maybe in the genus Olios with those black chelicerae. Could it even be a shed skin with the way the legs are stretched out in front? I have never seen one in person
Hi. the reason Olios never crossed my mind is Utah seems quite north of their range. I did some enhancements and your suggestion looks spot on. The eyes are Sparassidae. So Olios gigantius is a good call. I played with a number of them years back, found a few on the Palomar observatory walls. ‘Golden huntsman’ The very dark mouth parts and dark booties I should have noticed. If the site will let me post a video, you can see one in action: (593) Animals Anonymous | Golden Huntsman Spider – YouTube So, I stand corrected on my first post.… Read more »
Fantastic clip. Thanks. We just don’t have anything like that here in Ireland.
I think parts of England are as far north these can be found. they are pantropical.
I agree. I only see legs and cephalothorax. No abdomen.