https://bravewords.com/news/iconic-metal-painter-joe-petagno-portrays-websterian-fossil-monster-worm-named-after-cannibal-corpse-bassist-alex-we...

a Devonian era bobbit worm.  Annelid from Satan's Anus is more like it.  but the art reminds me of an old TSR cover.

http://www.sci-news.com/paleontology/websteroprion-armstrongi-04645.html