Extinct classes of monsters and their apex predator

Megabrute: Anjanath (old)

Direbrute: Drinotaurus

Cavebrute: Radobaan (old)

Omegabrute: titanxicliliesis

Atlanteron: athrojiuiles

Geoteron: tyuiliun

paleoteron: ahterion

paleoceran: eck-ete

swampiscine wyern: bufotodus (old)