History Main / MonstrousMandibles

* In ''TabletopGame/Warhammer40000'', these are practically standard on the Tyranid HordeOfAlienLocusts in one form or another, even ones like lictors that [[{{Cthulhumanoid}} don't have visible mouths to begin with]].

* Larger zerg, particularily hydralisks, in ''Videogame/StarcraftII'' have a hybrid between Functional and Bifurcated, with an outer set of jaws splitting apart.

* In ''LightNovel/{{Overlord}}'', Cocytus has a set of Functionals that appear to be more for crushing than piercing.

* Creator/MarvelComics:
** Man-Spider -- ComicBook/SpiderMan's mutated monstrous form -- has a pair of chelicerae alongside his now fang-lined jaws.

** ''ComicBook/SpiderVerse'' When Kaine unleashes the Other's full power against the Inheritors, it transforms him into an enormous monster with fanged jaws and four chelicerae.

* ''Fanfic/AbraxasHrodvitnon'': In this ''Franchise/{{Godzilla}}'' Franchise/MonsterVerse fanfiction, [[Characters/AbraxasHrodvitnonMonsterX Monster X]] in their final form has the Functional type, in the form of two jawbone-like pieces on either side of their actual jaw which can apparently flex.

* In ''Literature/{{Worm}}'' Taylor/Skitter evokes this artificially with her mask, which is designed to resemble the mouthparts of a insect to make her seem more frightening.

* In the ''Series/DoctorWho'' episode "Utopia", the alien scientist Chantho -- an {{insectoid|Aliens}} [[RubberForeheadAliens Rubber-Forehead Alien]] -- has a large set of Decoratives framing a normal human mouth.
* In ''Series/{{The Strain|TVSeries}}'', the vampires have fleshy mandibles that are typically retracted into their throat but come up into the mouth when they feed. They aren't used to feed themselves but act as a sheathe for the "tongue" the vampires use to drink blood, making them a strange variation on Functionals.
* ''Series/{{Supernatural}}'': [[Characters/SupernaturalMonstersAndSupernaturalBeings Creatures from a parallel universe]], [[AllThereInTheManual called "canids" in the script]], that were introduced in the Season 13 episode "Wayward Sisters" have mouths of this type. To use the words of the Supernatural wiki, "the canids mouth reveals a mandible that when opened reveals a beak with tendrils."

[[folder:Web Comics]]

As MostWritersAreHuman, we're typically most accustomed to dealing with other humans, or at least other vertebrates, and thus anything that deviates too much from that template falls into the UncannyValley. Even with animals we're used to seeing a two-part, one-on-top-of-the-other jaw system on everything from whales to dogs to birds.[[note]]All of which do have one mandible, incidentally: the hinged lower jaw, with the fixed upper jaw being properly known as the maxilla.[[/note]] So adding, say, arthropod-style mouthparts to the jaw system we're used to, or even replacing it entirely, is a quick and easy way to make something seem strange and other.

* Actually averted with many insects that have piercing and sucking mouth parts rather than ones adapted for biting and chewing.