This animal is almost all head.

Tardigrades lack several Hox genes and the mid-body region; most of their body aligns with an arthropod’s head.

Tardigrades: Evolution’s Head-First Body Plan

The lobopod-like luolishaniids from the Cambrian and Ordovician are possibly the closest fossil relatives of tardigrades. Entothryeos reconstruction shown.[56]

Shrunk from giants.

Evidence points to miniaturisation from lobopodian ancestors; fossils trace back about 500 million years to the Cambrian.

Tardigrades: Evolution’s Head-First Body Plan

DeepSwipeHomeApp StoreGoogle Play