Could extinct animal still be alive

Ultra Predator
MemberCompsognathusMarch 20, 20143428 Views11 Repliesi had this done for a while but never posted it basicly i looked up cryptid animals and thouhg they could still be alive. i wonder if there was any that i miss or that i may be wrong on what they are.
Now here are some
Mokele-mbembe Surviving sauropod
Emela-ntouka surviving ceratopsians
Mbielu-mbielu-mbielu Mbielu-mbielu-mbielu surviving stegosauria
Mahamba Surviving sarcosuchus
Ndendeki surviving relative Carbonemys cofrinii
Ngoubou a surviving dwarf species of triceratops
Nguma-monene a surviving subspecies of spinosaurus
Burrunjor a surviving theropod dinosaur like a tyrannosauridae or carcharodontosaurid
Muhuru a surviving species of osteoderms.
Kongamato a surviving pterosaur
Trinity Alps giant salamander a surviving carabanesis amphibian like ichthyostega
Mapinguary a surviving Megatherium subspecies
Megalodon a giant shark to survive the last ice age
Queensland Tiger a surviving marsupial lion.
Megalania the giant surviving monitor lizard that is said to still roam australia and parts of indonesia
Alkali lake monster could be a relative of Crocodylus anthropophagus
Beast of Bynoe could be a surviving species of plesiosaurs
Tapire-iaurara Surving Mesonychids