Appendages (tongue) – The character has a prehensile tongue.
Toad (Marvel) has this power.
An evil robot with a dangerous tongue appears in Sex Warrior, Toxic! #19 (Apocalypse).
The Banderhobb is much scarier than the Toad (D&D 4th Edition – Monster Manual 3).
Farrah has an out of control tongue that suggests some sort of Lovecraftian heritage (Glitterbomb #1, Image).
Fleshcrawler – Creature Collection I
Hound of Tindalos – Field Guide to Cthulhu Monsters
Rot Reaver – D&D 3.5 – Monster Manual III
Strain – Mister Quinlan – Vampire Hunter #1 (Dark Horse)
Some disgusting tongue action by a Deviant (Marvel) in Eternals V3 #5.