Ben 10 Alien Force: All Aliens' First Appearances

So wouldn't it be neat if they use the subspecies concept on Other aliens? Since all of them clearly look different on there first appearance : r/Ben10

Ben 10 (Western Animation) - TV Tropes

Category:Alien Force Aliens, Ben 10 Wiki

Ben 10 Alien Portraits (Original Series) by dlee1293847 on DeviantArt

ben 10 pt 3 - flashbacks - alien force aliens by mundoautista2018 on DeviantArt

Ben 10: Alien Force First Ten Aliens by dlee1293847 on DeviantArt

Brainstorm, Ben 10 Wiki

So wouldn't it be neat if they use the subspecies concept on Other aliens? Since all of them clearly look different on there first appearance : r/Ben10

All 63 Ben's Aliens : r/Ben10

The First 10 Aliens in Ben 10 - ReelRundown

The First 10 Aliens in Ben 10 - ReelRundown