Novavitia's quadrilobites are similar to Earth's (now extinct) trilobites, but with some major differences. Trilobites are named the way they are because they are horizontally separated into three parts (although they are also separated vertically into many parts.) Quadrilobites on the other hand, are separated vertically into four parts. Trilobites have legs with joints, while quadrilobites have legs that are essentially just one big muscle.

Quadrilobites feed by extending a series of tubes called ostubi from their mouth. These tubes vary in size in order to capture prey that varies in size. The quadrilobite will sneak up next to a group of prey, and then ambush them with its ostubi. Every ostubis leads directly to the throat.

Quadrilobite diagram:

As labeled in the diagram, quadrilobites also have a hard casing called the sublamina that protects the legs and internal organs.