Data Deficient

Hatzegopteryx

Hateg's giant sky-stalker

Helicoprion

Permian seas' spiral-toothed slicer

Xiphactinus

Not a dinosaur-Cretaceous sea predator

Snailfish

Snailfishes: clingers of the cold deep

Barreleye Fish (Barrel Eye)

A clear head with eyes that swivel

Pacific Spaghetti Eel

The eel that lives like a worm

Giant Wood Moth

Big moth, long childhood in wood

Xingu River Ray

Rio Xingu's Black Diamond Stingray

Volcano Snail

Armored snail of the iron vents

Irukandji Jellyfish

Small bell. Big sting.

Desert Wolf

Built to run, born to howl

Turtle Frog

Built like a turtle, lives like a mole

Long-Winged Kite Spider

Spines out, web set-kite spider ready

Tiger Trout

Built for bites, not breeding.

Asp Caterpillar

Looks like fur-stings like fire.

Puss Caterpillar

Soft look, sharp sting.

Giant Golden Mole

Gold in the soil, ghost of the forest

Golden Mole

Not true moles-Africa's sand swimmers

Chilesaurus

Chile's dinosaur mash-up

Crocodile Shark

Big eyes, open ocean, tiny lamniform

Tiktaalik

The Arctic "fishapod" in transition

Dragon Snake (Javan Tubercle Snake, Javan Mudsnake)

Dragon-hide scales in a leaf-litter life

Therizinosaurus

Scythe-clawed plant-eater theropod

Antiguan Racer Snake

Antigua's comeback snake