It took me a while to remember the term, but this, uh genre, of artistic expression is referred to as momento mori. There are a few translations but the one closest is probably moment of death.

The genre arguably started with the building of the pyramids, which were transported and built in part, from the blood and flesh of countless slave labor, and then over time the genre found widespread use in western art with depections of the death of JC, along with divine judgment, etc., and has continued on from there and evidently now extends for some to the idea of ant colonies which are entombed in a variety of media.